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Kirill A. Shutemov
26db39027c cris: fix potential NULL-pointer dereference 
Add missing check for memory allocation fail.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Mikael Starvik <starvik@axis.com>
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2013-11-15 09:32:15 +09:00
Kirill A. Shutemov
09ef493985 x86: add missed pgtable_pmd_page_ctor/dtor calls for preallocated pmds 
In split page table lock case, we embed spinlock_t into struct page.
For obvious reason, we don't want to increase size of struct page if
spinlock_t is too big, like with DEBUG_SPINLOCK or DEBUG_LOCK_ALLOC or
on -rt kernel.  So we disable split page table lock, if spinlock_t is
too big.

This patchset allows to allocate the lock dynamically if spinlock_t is
big.  In this page->ptl is used to store pointer to spinlock instead of
spinlock itself.  It costs additional cache line for indirect access,
but fix page fault scalability for multi-threaded applications.

LOCK_STAT depends on DEBUG_SPINLOCK, so on current kernel enabling
LOCK_STAT to analyse scalability issues breaks scalability.  ;)

The patchset mostly fixes this.  Results for ./thp_memscale -c 80 -b 512M
on 4-socket machine:

baseline, no CONFIG_LOCK_STAT:	9.115460703 seconds time elapsed
baseline, CONFIG_LOCK_STAT=y:	53.890567123 seconds time elapsed
patched, no CONFIG_LOCK_STAT:	8.852250368 seconds time elapsed
patched, CONFIG_LOCK_STAT=y:	11.069770759 seconds time elapsed

Patch count is scary, but most of them trivial. Overview:

 Patches 1-4	Few bug fixes. No dependencies to other patches.
		Probably should applied as soon as possible.

 Patch 5	Changes signature of pgtable_page_ctor(). We will use it
		for dynamic lock allocation, so it can fail.

 Patches 6-8	Add missing constructor/destructor calls on few archs.
		It's fixes NR_PAGETABLE accounting and prepare to use
		split ptl.

 Patches 9-33	Add pgtable_page_ctor() fail handling to all archs.

 Patches 34	Finally adds support of dynamically-allocated page->pte.
		Also contains documentation for split page table lock.

This patch (of 34):

I've missed that we preallocate few pmds on pgd_alloc() if X86_PAE
enabled.  Let's add missed constructor/destructor calls.

I haven't noticed it during testing since prep_new_page() clears
page->mapping and therefore page->ptl.  It's effectively equal to
spin_lock_init(&page->ptl).

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chen Liqin <liqin.chen@sunplusct.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Howells <dhowells@redhat.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
Cc: Lennox Wu <lennox.wu@gmail.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Mikael Starvik <starvik@axis.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Richard Kuo <rkuo@codeaurora.org>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2013-11-15 09:32:15 +09:00
Kirill A. Shutemov
9491846fca x86, mm: enable split page table lock for PMD level 
Enable PMD split page table lock for X86_64 and PAE.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Tested-by: Alex Thorlton <athorlton@sgi.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: "Eric W . Biederman" <ebiederm@xmission.com>
Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Jones <davej@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Robin Holt <robinmholt@gmail.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Hugh Dickins <hughd@google.com>
Reviewed-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2013-11-15 09:32:15 +09:00
Kirill A. Shutemov
e009bb30c8 mm: implement split page table lock for PMD level 
The basic idea is the same as with PTE level: the lock is embedded into
struct page of table's page.

We can't use mm->pmd_huge_pte to store pgtables for THP, since we don't
take mm->page_table_lock anymore.  Let's reuse page->lru of table's page
for that.

pgtable_pmd_page_ctor() returns true, if initialization is successful
and false otherwise.  Current implementation never fails, but assumption
that constructor can fail will help to port it to -rt where spinlock_t
is rather huge and cannot be embedded into struct page -- dynamic
allocation is required.

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Tested-by: Alex Thorlton <athorlton@sgi.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "Eric W . Biederman" <ebiederm@xmission.com>
Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Jones <davej@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Robin Holt <robinmholt@gmail.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Hugh Dickins <hughd@google.com>
Reviewed-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2013-11-15 09:32:15 +09:00
Kirill A. Shutemov
c4088ebdca mm: convert the rest to new page table lock api 
Only trivial cases left. Let's convert them altogether.

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Tested-by: Alex Thorlton <athorlton@sgi.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "Eric W . Biederman" <ebiederm@xmission.com>
Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Jones <davej@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Robin Holt <robinmholt@gmail.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2013-11-15 09:32:15 +09:00
Kirill A. Shutemov
cb900f4121 mm, hugetlb: convert hugetlbfs to use split pmd lock 
Hugetlb supports multiple page sizes. We use split lock only for PMD
level, but not for PUD.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Tested-by: Alex Thorlton <athorlton@sgi.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "Eric W . Biederman" <ebiederm@xmission.com>
Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Jones <davej@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Robin Holt <robinmholt@gmail.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2013-11-15 09:32:14 +09:00
Kirill A. Shutemov
c389a250ab mm, thp: do not access mm->pmd_huge_pte directly 
Currently mm->pmd_huge_pte protected by page table lock.  It will not
work with split lock.  We have to have per-pmd pmd_huge_pte for proper
access serialization.

For now, let's just introduce wrapper to access mm->pmd_huge_pte.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Tested-by: Alex Thorlton <athorlton@sgi.com>
Cc: Alex Thorlton <athorlton@sgi.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: "Eric W . Biederman" <ebiederm@xmission.com>
Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Jones <davej@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Robin Holt <robinmholt@gmail.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2013-11-15 09:32:14 +09:00
Kirill A. Shutemov
117b0791ac mm, thp: move ptl taking inside page_check_address_pmd() 
With split page table lock we can't know which lock we need to take
before we find the relevant pmd.

Let's move lock taking inside the function.

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Tested-by: Alex Thorlton <athorlton@sgi.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "Eric W . Biederman" <ebiederm@xmission.com>
Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Jones <davej@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Robin Holt <robinmholt@gmail.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2013-11-15 09:32:14 +09:00
Kirill A. Shutemov
bf929152e9 mm, thp: change pmd_trans_huge_lock() to return taken lock 
With split ptlock it's important to know which lock
pmd_trans_huge_lock() took.  This patch adds one more parameter to the
function to return the lock.

In most places migration to new api is trivial.  Exception is
move_huge_pmd(): we need to take two locks if pmd tables are different.

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Tested-by: Alex Thorlton <athorlton@sgi.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "Eric W . Biederman" <ebiederm@xmission.com>
Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Jones <davej@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Robin Holt <robinmholt@gmail.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2013-11-15 09:32:14 +09:00
Kirill A. Shutemov
9a86cb7bdc mm: introduce api for split page table lock for PMD level 
Basic api, backed by mm->page_table_lock for now. Actual implementation
will be added later.

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Tested-by: Alex Thorlton <athorlton@sgi.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "Eric W . Biederman" <ebiederm@xmission.com>
Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Jones <davej@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Robin Holt <robinmholt@gmail.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2013-11-15 09:32:14 +09:00
Kirill A. Shutemov
e1f56c89b0 mm: convert mm->nr_ptes to atomic_long_t 
With split page table lock for PMD level we can't hold mm->page_table_lock
while updating nr_ptes.

Let's convert it to atomic_long_t to avoid races.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Tested-by: Alex Thorlton <athorlton@sgi.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: "Eric W . Biederman" <ebiederm@xmission.com>
Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Jones <davej@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Robin Holt <robinmholt@gmail.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2013-11-15 09:32:14 +09:00
Kirill A. Shutemov
57c1ffcefb mm: rename USE_SPLIT_PTLOCKS to USE_SPLIT_PTE_PTLOCKS 
We're going to introduce split page table lock for PMD level.  Let's
rename existing split ptlock for PTE level to avoid confusion.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Tested-by: Alex Thorlton <athorlton@sgi.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: "Eric W . Biederman" <ebiederm@xmission.com>
Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Jones <davej@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Robin Holt <robinmholt@gmail.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2013-11-15 09:32:14 +09:00
Kirill A. Shutemov
e9bb18c7b9 mm: avoid increase sizeof(struct page) due to split page table lock 
Alex Thorlton noticed that some massively threaded workloads work poorly,
if THP enabled.  This patchset fixes this by introducing split page table
lock for PMD tables.  hugetlbfs is not covered yet.

This patchset is based on work by Naoya Horiguchi.

: akpm result summary:
:
: THP off, v3.12-rc2: 18.059261877 seconds time elapsed
: THP off, patched:   16.768027318 seconds time elapsed
:
: THP on, v3.12-rc2:  42.162306788 seconds time elapsed
: THP on, patched:    8.397885779 seconds time elapsed
:
: HUGETLB, v3.12-rc2: 47.574936948 seconds time elapsed
: HUGETLB, patched:   19.447481153 seconds time elapsed

THP off, v3.12-rc2:
-------------------

 Performance counter stats for './thp_memscale -c 80 -b 512m' (5 runs):

    1037072.835207 task-clock                #   57.426 CPUs utilized            ( +-  3.59% )
            95,093 context-switches          #    0.092 K/sec                    ( +-  3.93% )
               140 cpu-migrations            #    0.000 K/sec                    ( +-  5.28% )
        10,000,550 page-faults               #    0.010 M/sec                    ( +-  0.00% )
 2,455,210,400,261 cycles                    #    2.367 GHz                      ( +-  3.62% ) [83.33%]
 2,429,281,882,056 stalled-cycles-frontend   #   98.94% frontend cycles idle     ( +-  3.67% ) [83.33%]
 1,975,960,019,659 stalled-cycles-backend    #   80.48% backend  cycles idle     ( +-  3.88% ) [66.68%]
    46,503,296,013 instructions              #    0.02  insns per cycle
                                             #   52.24  stalled cycles per insn  ( +-  3.21% ) [83.34%]
     9,278,997,542 branches                  #    8.947 M/sec                    ( +-  4.00% ) [83.34%]
        89,881,640 branch-misses             #    0.97% of all branches          ( +-  1.17% ) [83.33%]

      18.059261877 seconds time elapsed                                          ( +-  2.65% )

THP on, v3.12-rc2:
------------------

 Performance counter stats for './thp_memscale -c 80 -b 512m' (5 runs):

    3114745.395974 task-clock                #   73.875 CPUs utilized            ( +-  1.84% )
           267,356 context-switches          #    0.086 K/sec                    ( +-  1.84% )
                99 cpu-migrations            #    0.000 K/sec                    ( +-  1.40% )
            58,313 page-faults               #    0.019 K/sec                    ( +-  0.28% )
 7,416,635,817,510 cycles                    #    2.381 GHz                      ( +-  1.83% ) [83.33%]
 7,342,619,196,993 stalled-cycles-frontend   #   99.00% frontend cycles idle     ( +-  1.88% ) [83.33%]
 6,267,671,641,967 stalled-cycles-backend    #   84.51% backend  cycles idle     ( +-  2.03% ) [66.67%]
   117,819,935,165 instructions              #    0.02  insns per cycle
                                             #   62.32  stalled cycles per insn  ( +-  4.39% ) [83.34%]
    28,899,314,777 branches                  #    9.278 M/sec                    ( +-  4.48% ) [83.34%]
        71,787,032 branch-misses             #    0.25% of all branches          ( +-  1.03% ) [83.33%]

      42.162306788 seconds time elapsed                                          ( +-  1.73% )

HUGETLB, v3.12-rc2:
-------------------

 Performance counter stats for './thp_memscale_hugetlbfs -c 80 -b 512M' (5 runs):

    2588052.787264 task-clock                #   54.400 CPUs utilized            ( +-  3.69% )
           246,831 context-switches          #    0.095 K/sec                    ( +-  4.15% )
               138 cpu-migrations            #    0.000 K/sec                    ( +-  5.30% )
            21,027 page-faults               #    0.008 K/sec                    ( +-  0.01% )
 6,166,666,307,263 cycles                    #    2.383 GHz                      ( +-  3.68% ) [83.33%]
 6,086,008,929,407 stalled-cycles-frontend   #   98.69% frontend cycles idle     ( +-  3.77% ) [83.33%]
 5,087,874,435,481 stalled-cycles-backend    #   82.51% backend  cycles idle     ( +-  4.41% ) [66.67%]
   133,782,831,249 instructions              #    0.02  insns per cycle
                                             #   45.49  stalled cycles per insn  ( +-  4.30% ) [83.34%]
    34,026,870,541 branches                  #   13.148 M/sec                    ( +-  4.24% ) [83.34%]
        68,670,942 branch-misses             #    0.20% of all branches          ( +-  3.26% ) [83.33%]

      47.574936948 seconds time elapsed                                          ( +-  2.09% )

THP off, patched:
-----------------

 Performance counter stats for './thp_memscale -c 80 -b 512m' (5 runs):

     943301.957892 task-clock                #   56.256 CPUs utilized            ( +-  3.01% )
            86,218 context-switches          #    0.091 K/sec                    ( +-  3.17% )
               121 cpu-migrations            #    0.000 K/sec                    ( +-  6.64% )
        10,000,551 page-faults               #    0.011 M/sec                    ( +-  0.00% )
 2,230,462,457,654 cycles                    #    2.365 GHz                      ( +-  3.04% ) [83.32%]
 2,204,616,385,805 stalled-cycles-frontend   #   98.84% frontend cycles idle     ( +-  3.09% ) [83.32%]
 1,778,640,046,926 stalled-cycles-backend    #   79.74% backend  cycles idle     ( +-  3.47% ) [66.69%]
    45,995,472,617 instructions              #    0.02  insns per cycle
                                             #   47.93  stalled cycles per insn  ( +-  2.51% ) [83.34%]
     9,179,700,174 branches                  #    9.731 M/sec                    ( +-  3.04% ) [83.35%]
        89,166,529 branch-misses             #    0.97% of all branches          ( +-  1.45% ) [83.33%]

      16.768027318 seconds time elapsed                                          ( +-  2.47% )

THP on, patched:
----------------

 Performance counter stats for './thp_memscale -c 80 -b 512m' (5 runs):

     458793.837905 task-clock                #   54.632 CPUs utilized            ( +-  0.79% )
            41,831 context-switches          #    0.091 K/sec                    ( +-  0.97% )
                98 cpu-migrations            #    0.000 K/sec                    ( +-  1.66% )
            57,829 page-faults               #    0.126 K/sec                    ( +-  0.62% )
 1,077,543,336,716 cycles                    #    2.349 GHz                      ( +-  0.81% ) [83.33%]
 1,067,403,802,964 stalled-cycles-frontend   #   99.06% frontend cycles idle     ( +-  0.87% ) [83.33%]
   864,764,616,143 stalled-cycles-backend    #   80.25% backend  cycles idle     ( +-  0.73% ) [66.68%]
    16,129,177,440 instructions              #    0.01  insns per cycle
                                             #   66.18  stalled cycles per insn  ( +-  7.94% ) [83.35%]
     3,618,938,569 branches                  #    7.888 M/sec                    ( +-  8.46% ) [83.36%]
        33,242,032 branch-misses             #    0.92% of all branches          ( +-  2.02% ) [83.32%]

       8.397885779 seconds time elapsed                                          ( +-  0.18% )

HUGETLB, patched:
-----------------

 Performance counter stats for './thp_memscale_hugetlbfs -c 80 -b 512M' (5 runs):

     395353.076837 task-clock                #   20.329 CPUs utilized            ( +-  8.16% )
            55,730 context-switches          #    0.141 K/sec                    ( +-  5.31% )
               138 cpu-migrations            #    0.000 K/sec                    ( +-  4.24% )
            21,027 page-faults               #    0.053 K/sec                    ( +-  0.00% )
   930,219,717,244 cycles                    #    2.353 GHz                      ( +-  8.21% ) [83.32%]
   914,295,694,103 stalled-cycles-frontend   #   98.29% frontend cycles idle     ( +-  8.35% ) [83.33%]
   704,137,950,187 stalled-cycles-backend    #   75.70% backend  cycles idle     ( +-  9.16% ) [66.69%]
    30,541,538,385 instructions              #    0.03  insns per cycle
                                             #   29.94  stalled cycles per insn  ( +-  3.98% ) [83.35%]
     8,415,376,631 branches                  #   21.286 M/sec                    ( +-  3.61% ) [83.36%]
        32,645,478 branch-misses             #    0.39% of all branches          ( +-  3.41% ) [83.32%]

      19.447481153 seconds time elapsed                                          ( +-  2.00% )

This patch (of 11):

CONFIG_GENERIC_LOCKBREAK increases sizeof(spinlock_t) to 8 bytes.  It
leads to increase sizeof(struct page) by 4 bytes on 32-bit system if split
page table lock is in use, since page->ptl shares space in union with
longs and pointers.

Let's disable split page table lock on 32-bit systems with
GENERIC_LOCKBREAK enabled.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Alex Thorlton <athorlton@sgi.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: "Eric W . Biederman" <ebiederm@xmission.com>
Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Jones <davej@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Robin Holt <robinmholt@gmail.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2013-11-15 09:32:13 +09:00
Kirill A. Shutemov
b77d88d493 mm: drop actor argument of do_generic_file_read() 
There's only one caller of do_generic_file_read() and the only actor is
file_read_actor().  No reason to have a callback parameter.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Cc: Matthew Wilcox <willy@linux.intel.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2013-11-15 09:32:13 +09:00
Andrew Morton
a0dce7f0ac drivers/memstick/core/ms_block.c: fix spelling of MSB_RP_RECIVE_STATUS_REG 
Cc: Maxim Levitsky <maximlevitsky@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2013-11-15 09:32:13 +09:00
Linus Torvalds
4fbf888acc Ext4 updates for 3.13. Mostly bug fixes and cleanups. 
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Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

Pull ext4 changes from Ted Ts'o:
 "Ext4 updates for 3.13.  Mostly bug fixes and cleanups"

* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: add prototypes for macro-generated functions
  ext4: return non-zero st_blocks for inline data
  ext4: use prandom_u32() instead of get_random_bytes()
  ext4: remove unreachable code after ext4_can_extents_be_merged()
  ext4: remove unreachable code in ext4_can_extents_be_merged()
  ext4: avoid bh leak in retry path of ext4_expand_extra_isize_ea()
  ext4: don't count free clusters from a corrupt block group
  ext4: fix FITRIM in no journal mode
  ext4: drop set but otherwise unused variable from ext4_add_dirent_to_inline()
  ext4: change ext4_read_inline_dir() to return 0 on success
  ext4: pair trace_ext4_writepages & trace_ext4_writepages_result
  ext4: add ratelimiting to ext4 messages
  ext4: fix performance regression in ext4_writepages
  ext4: fixup kerndoc annotation of mpage_map_and_submit_extent()
  ext4: fix assertion in ext4_add_complete_io()
 2013-11-14 17:19:58 +09:00
Linus Torvalds
7e1a1e9378 xfs: update for v3.13-rc1 
For 3.13-rc1 we have an eclectic assortment of bugfixes, cleanups, and
 refactoring.  Bugfixes that stand out are the fix for the AGF/AGI
 deadlock, incore extent list fixes, verifier fixes for v4 superblocks
 and growfs, and memory leaks.  There are some asserts, warnings, and
 strings that were cleaned up.  There was further rearrangement of code
 to make libxfs and the kernel sync up more easily, differences between
 v2 and v3 directory code were abstracted using an ops vector,
 xfs_inactive was reworked, and the preallocation/hole punching code was
 refactored.
 
 - simplify kmem_zone_zalloc
 - add traces for AGF/AGI read ops
 - add additional AIL traces
 - fix xfs_remove AGF vs AGI deadlock
 - fix the extent count of new incore extent page in the indirection array
 - don't fail bad secondary superblocks verification on v4 filesystems
   due to unzeroed bits after v4 fields
 - fix possible NULL dereference in xlog_verify_iclog
 - remove redundant assert in xfs_dir2_leafn_split
 - prevent stack overflows from page cache allocation
 - fix some sparse warnings
 - fix directory block format verifier to check the leaf entry count
 - abstract the differences in dir2/dir3 via an ops vector
 - continue process of reorganization to make libxfs/kernel code merges easier
 - refactor the preallocation and hole punching code
 - fix for growfs and verifiers
 - remove unnecessary scary corruption error when probing non-xfs filesystems
 - remove extra newlines from strings passed to printk
 - prevent deadlock trying to cover an active log
 - rework xfs_inactive()
 - add the inode directory type support to XFS_IOC_FSGEOM
 - cleanup (remove) usage of is_bad_inode
 - fix miscalculation in xfs_iext_realloc_direct which results in oversized
   direct extent list
 - remove unnecessary count arg to xfs_iomap_write_allocate
 - fix memory leak in xlog_recover_add_to_trans
 - check superblock instead of block magic to determine if dtype field
   is present
 - fix lockdep annotation due to project quotas
 - fix regression in xfs_node_toosmall which can lead to incorrect directory
   btree node collapse
 - make log recovery verify filesystem uuid of recovering blocks
 - fix XFS_IOC_FREE_EOFBLOCKS definition
 - remove invalid assert in xfs_inode_free
 - fix for AIL lock regression
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Merge tag 'xfs-for-linus-v3.13-rc1' of git://oss.sgi.com/xfs/xfs

Pull xfs update from Ben Myers:
 "For 3.13-rc1 we have an eclectic assortment of bugfixes, cleanups, and
  refactoring.  Bugfixes that stand out are the fix for the AGF/AGI
  deadlock, incore extent list fixes, verifier fixes for v4 superblocks
  and growfs, and memory leaks.  There are some asserts, warnings, and
  strings that were cleaned up.  There was further rearrangement of code
  to make libxfs and the kernel sync up more easily, differences between
  v2 and v3 directory code were abstracted using an ops vector,
  xfs_inactive was reworked, and the preallocation/hole punching code
  was refactored.

   - simplify kmem_zone_zalloc
   - add traces for AGF/AGI read ops
   - add additional AIL traces
   - fix xfs_remove AGF vs AGI deadlock
   - fix the extent count of new incore extent page in the indirection
     array
   - don't fail bad secondary superblocks verification on v4 filesystems
     due to unzeroed bits after v4 fields
   - fix possible NULL dereference in xlog_verify_iclog
   - remove redundant assert in xfs_dir2_leafn_split
   - prevent stack overflows from page cache allocation
   - fix some sparse warnings
   - fix directory block format verifier to check the leaf entry count
   - abstract the differences in dir2/dir3 via an ops vector
   - continue process of reorganization to make libxfs/kernel code
     merges easier
   - refactor the preallocation and hole punching code
   - fix for growfs and verifiers
   - remove unnecessary scary corruption error when probing non-xfs
     filesystems
   - remove extra newlines from strings passed to printk
   - prevent deadlock trying to cover an active log
   - rework xfs_inactive()
   - add the inode directory type support to XFS_IOC_FSGEOM
   - cleanup (remove) usage of is_bad_inode
   - fix miscalculation in xfs_iext_realloc_direct which results in
     oversized direct extent list
   - remove unnecessary count arg to xfs_iomap_write_allocate
   - fix memory leak in xlog_recover_add_to_trans
   - check superblock instead of block magic to determine if dtype field
     is present
   - fix lockdep annotation due to project quotas
   - fix regression in xfs_node_toosmall which can lead to incorrect
     directory btree node collapse
   - make log recovery verify filesystem uuid of recovering blocks
   - fix XFS_IOC_FREE_EOFBLOCKS definition
   - remove invalid assert in xfs_inode_free
   - fix for AIL lock regression"

* tag 'xfs-for-linus-v3.13-rc1' of git://oss.sgi.com/xfs/xfs: (49 commits)
  xfs: simplify kmem_{zone_}zalloc
  xfs: add tracepoints to AGF/AGI read operations
  xfs: trace AIL manipulations
  xfs: xfs_remove deadlocks due to inverted AGF vs AGI lock ordering
  xfs: fix the extent count when allocating an new indirection array entry
  xfs: be more forgiving of a v4 secondary sb w/ junk in v5 fields
  xfs: fix possible NULL dereference in xlog_verify_iclog
  xfs:xfs_dir2_node.c: pointer use before check for null
  xfs: prevent stack overflows from page cache allocation
  xfs: fix static and extern sparse warnings
  xfs: validity check the directory block leaf entry count
  xfs: make dir2 ftype offset pointers explicit
  xfs: convert directory vector functions to constants
  xfs: convert directory vector functions to constants
  xfs: vectorise encoding/decoding directory headers
  xfs: vectorise DA btree operations
  xfs: vectorise directory leaf operations
  xfs: vectorise directory data operations part 2
  xfs: vectorise directory data operations
  xfs: vectorise remaining shortform dir2 ops
  ...
 2013-11-14 17:16:35 +09:00
Linus Torvalds
fcd7476f9e Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull perf updates from Ingo Molnar:
 "A number of fixes:

   - Fix segfault on perf trace -i perf.data, from Namhyung Kim.

   - Fix segfault with --no-mmap-pages, from David Ahern.

   - Don't force a refresh during progress update in the TUI, greatly
     reducing startup costs, fix from Patrick Palka.

   - Fix sw clock event period test wrt not checking if using >
     max_sample_freq.

   - Handle throttle events in 'object code reading' test, fix from
     Adrian Hunter.

   - Prevent condition that all sort keys are elided, fix from Namhyung
     Kim.

   - Round mmap pages to power 2, from David Ahern.

  And a number of late arrival changes:

   - Add summary only option to 'perf trace', suppressing the decoding
     of events, from David Ahern

   - 'perf trace --summary' formatting simplifications, from Pekka
     Enberg.

   - Beautify fifth argument of mmap() as fd, in 'perf trace', from
     Namhyung Kim.

   - Add direct access to dynamic arrays in libtraceevent, from Steven
     Rostedt.

   - Synthesize non-exec MMAP records when --data used, allowing the
     resolution of data addresses to symbols (global variables, etc), by
     Arnaldo Carvalho de Melo.

   - Code cleanups by David Ahern and Adrian Hunter"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits)
  tools lib traceevent: Add direct access to dynamic arrays
  perf target: Shorten perf_target__ to target__
  perf tests: Handle throttle events in 'object code reading' test
  perf evlist: Refactor mmap_pages parsing
  perf evlist: Round mmap pages to power 2 - v2
  perf record: Fix segfault with --no-mmap-pages
  perf trace: Add summary only option
  perf trace: Simplify '--summary' output
  perf trace: Change syscall summary duration order
  perf tests: Compensate lower sample freq with longer test loop
  perf trace: Fix segfault on perf trace -i perf.data
  perf trace: Separate tp syscall field caching into init routine to be reused
  perf trace: Beautify fifth argument of mmap() as fd
  perf tests: Use lower sample_freq in sw clock event period test
  perf tests: Check return of perf_evlist__open sw clock event period test
  perf record: Move existing write_output into helper function
  perf record: Use correct return type for write()
  perf tools: Prevent condition that all sort keys are elided
  perf machine: Simplify synthesize_threads method
  perf machine: Introduce synthesize_threads method out of open coded equivalent
  ...
 2013-11-14 16:56:32 +09:00
Linus Torvalds
d320e203ba Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull two x86 fixes from Ingo Molnar.

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/microcode/amd: Tone down printk(), don't treat a missing firmware file as an error
  x86/dumpstack: Fix printk_address for direct addresses
 2013-11-14 16:55:56 +09:00
Linus Torvalds
fe8a45df36 Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull scheduler fixes from Ingo Molnar:
 "Four bugfixes and one performance fix"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/fair: Avoid integer overflow
  sched: Optimize task_sched_runtime()
  sched/numa: Cure update_numa_stats() vs. hotplug
  sched/numa: Fix NULL pointer dereference in task_numa_migrate()
  sched: Fix endless sync_sched/rcu() loop inside _cpu_down()
 2013-11-14 16:55:11 +09:00
Linus Torvalds
5e30025a31 Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull core locking changes from Ingo Molnar:
 "The biggest changes:

   - add lockdep support for seqcount/seqlocks structures, this
     unearthed both bugs and required extra annotation.

   - move the various kernel locking primitives to the new
     kernel/locking/ directory"

* 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (21 commits)
  block: Use u64_stats_init() to initialize seqcounts
  locking/lockdep: Mark __lockdep_count_forward_deps() as static
  lockdep/proc: Fix lock-time avg computation
  locking/doc: Update references to kernel/mutex.c
  ipv6: Fix possible ipv6 seqlock deadlock
  cpuset: Fix potential deadlock w/ set_mems_allowed
  seqcount: Add lockdep functionality to seqcount/seqlock structures
  net: Explicitly initialize u64_stats_sync structures for lockdep
  locking: Move the percpu-rwsem code to kernel/locking/
  locking: Move the lglocks code to kernel/locking/
  locking: Move the rwsem code to kernel/locking/
  locking: Move the rtmutex code to kernel/locking/
  locking: Move the semaphore core to kernel/locking/
  locking: Move the spinlock code to kernel/locking/
  locking: Move the lockdep code to kernel/locking/
  locking: Move the mutex code to kernel/locking/
  hung_task debugging: Add tracepoint to report the hang
  x86/locking/kconfig: Update paravirt spinlock Kconfig description
  lockstat: Report avg wait and hold times
  lockdep, x86/alternatives: Drop ancient lockdep fixup message
  ...
 2013-11-14 16:30:30 +09:00
Linus Torvalds
7971e23a66 Merge branch 'x86-trace-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull x86/trace changes from Ingo Molnar:
 "This adds page fault tracepoints which have zero runtime cost in the
  disabled case via IDT trickery (no NOPs in the page fault hotpath)"

* 'x86-trace-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86, trace: Change user|kernel_page_fault to page_fault_user|kernel
  x86, trace: Add page fault tracepoints
  x86, trace: Delete __trace_alloc_intr_gate()
  x86, trace: Register exception handler to trace IDT
  x86, trace: Remove __alloc_intr_gate()
 2013-11-14 16:25:10 +09:00
Linus Torvalds
f0d55cc1a6 fbdev changes for 3.13 
Nothing particularly stands out in this pull request. The biggest part of the
 changes are cleanups.
 
 Maybe one fix to mention is the "fb: reorder the lock sequence to fix potential
 dead lock" which hopefully fixes the fb locking issues reported by multiple
 persons.
 
 There are also a few commits that have changes to arch/arm/mach-at91 and
 arch/avr32, which have been acked by the maintainers.
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Merge tag 'fbdev-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux

Pull fbdev changes from Tomi Valkeinen:
 "Nothing particularly stands out in this pull request.  The biggest
  part of the changes are cleanups.

  Maybe one fix to mention is the "fb: reorder the lock sequence to fix
  potential dead lock" which hopefully fixes the fb locking issues
  reported by multiple persons.

  There are also a few commits that have changes to arch/arm/mach-at91
  and arch/avr32, which have been acked by the maintainers"

* tag 'fbdev-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux: (143 commits)
  fb: reorder the lock sequence to fix potential dead lock
  fbdev: shmobile-lcdcfb: Convert to clk_prepare/unprepare
  fbdev: shmobile-hdmi: Convert to clk_prepare/unprepare
  omapdss: Add new panel driver for Topolly td028ttec1 LCD.
  video: exynos_mipi_dsi: Unlock the mutex before returning
  video: da8xx-fb: remove unwanted define
  video: Remove unnecessary semicolons
  simplefb: use write-combined remapping
  simplefb: fix unmapping fb during destruction
  OMAPDSS: connector-dvi: fix releasing i2c_adapter
  OMAPDSS: DSI: fix perf measuring ifdefs
  framebuffer: Use fb_<level>
  framebuffer: Add fb_<level> convenience logging macros
  efifb: prevent null-deref when iterating dmi_list
  fbdev: fix error return code in metronomefb_probe()
  video: xilinxfb: Fix for "Use standard variable name convention"
  OMAPDSS: Fix de_level in videomode_to_omap_video_timings()
  video: xilinxfb: Simplify error path
  video: xilinxfb: Use devm_kzalloc instead of kzalloc
  video: xilinxfb: Use standard variable name convention
  ...
 2013-11-14 14:44:20 +09:00
Linus Torvalds
549608eadb Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux 
Pull thermal management updates from Zhang Rui:
 "This time we only have a few changes as there are no soc thermal
  changes from Eduardo.  The only big change is the introduction of
  TMON, a tool to help visualize, tune, and test the thermal subsystem.
  The rest is mostly cleanups and fixes all over.

  Specifics:

   - introduce TMON, a tool base on thermal sysfs I/F.  It can be used
     to visualize, tune and test the thermal subsystem.

   - fix a zone/cooling device binding problem, when both thermal zone
     bind parameters and .bind() callback are available"

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux:
  tools/thermal: Introduce tmon, a tool for thermal subsystem
  thermal: Fix binding problem when there is thermal zone params
  thermal: cpu_cooling: fix return value check in cpufreq_cooling_register()
  Thermal: Check for validity before doing kfree
  thermal/intel_powerclamp: Add newer CPU models
  Thermal: Tidy up error handling in powerclamp_init
  thermal: Kconfig: cosmetic fixes
  ACPI/thermal : Remove zone disabled warning
  typo in drivers/thermal/Kconfig: lpatform instead of platform
 2013-11-14 14:42:31 +09:00
Linus Torvalds
2f466d33f5 PCI changes for the v3.13 merge window: 
Resource management
     - Fix host bridge window coalescing (Alexey Neyman)
     - Pass type, width, and prefetchability for window alignment (Wei Yang)
 
   PCI device hotplug
     - Convert acpiphp, acpiphp_ibm to dynamic debug (Lan Tianyu)
 
   Power management
     - Remove pci_pm_complete() (Liu Chuansheng)
 
   MSI
     - Fail initialization if device is not in PCI_D0 (Yijing Wang)
 
   MPS (Max Payload Size)
     - Use pcie_get_mps() and pcie_set_mps() to simplify code (Yijing Wang)
     - Use pcie_set_readrq() to simplify code (Yijing Wang)
     - Use cached pci_dev->pcie_mpss to simplify code (Yijing Wang)
 
   SR-IOV
     - Enable upstream bridges even for VFs on virtual buses (Bjorn Helgaas)
     - Use pci_is_root_bus() to avoid catching virtual buses (Wei Yang)
 
   Virtualization
     - Add x86 MSI masking ops (Konrad Rzeszutek Wilk)
 
   Freescale i.MX6
     - Support i.MX6 PCIe controller (Sean Cross)
     - Increase link startup timeout (Marek Vasut)
     - Probe PCIe in fs_initcall() (Marek Vasut)
     - Fix imprecise abort handler (Tim Harvey)
     - Remove redundant of_match_ptr (Sachin Kamat)
 
   Renesas R-Car
     - Support Gen2 internal PCIe controller (Valentine Barshak)
 
   Samsung Exynos
     - Add MSI support (Jingoo Han)
     - Turn off power when link fails (Jingoo Han)
     - Add Jingoo Han as maintainer (Jingoo Han)
     - Add clk_disable_unprepare() on error path (Wei Yongjun)
     - Remove redundant of_match_ptr (Sachin Kamat)
 
   Synopsys DesignWare
     - Add irq_create_mapping() (Pratyush Anand)
     - Add header guards (Seungwon Jeon)
 
   Miscellaneous
     - Enable native PCIe services by default on non-ACPI (Andrew Murray)
     - Cleanup _OSC usage and messages (Bjorn Helgaas)
     - Remove pcibios_last_bus boot option on non-x86 (Bjorn Helgaas)
     - Convert bus code to use bus_, drv_, and dev_groups (Greg Kroah-Hartman)
     - Remove unused pci_mem_start (Myron Stowe)
     - Make sysfs functions static (Sachin Kamat)
     - Warn on invalid return from driver probe (Stephen M. Cameron)
     - Remove Intel Haswell D3 delays (Todd E Brandt)
     - Call pci_set_master() in core if driver doesn't do it (Yinghai Lu)
     - Use pci_is_pcie() to simplify code (Yijing Wang)
     - Use PCIe capability accessors to simplify code (Yijing Wang)
     - Use cached pci_dev->pcie_cap to simplify code (Yijing Wang)
     - Removed unused "is_pcie" from struct pci_dev (Yijing Wang)
     - Simplify sysfs CPU affinity implementation (Yijing Wang))
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Merge tag 'pci-v3.13-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI changes from Bjorn Helgaas:
 "Resource management
    - Fix host bridge window coalescing (Alexey Neyman)
    - Pass type, width, and prefetchability for window alignment (Wei Yang)

  PCI device hotplug
    - Convert acpiphp, acpiphp_ibm to dynamic debug (Lan Tianyu)

  Power management
    - Remove pci_pm_complete() (Liu Chuansheng)

  MSI
    - Fail initialization if device is not in PCI_D0 (Yijing Wang)

  MPS (Max Payload Size)
    - Use pcie_get_mps() and pcie_set_mps() to simplify code (Yijing Wang)
    - Use pcie_set_readrq() to simplify code (Yijing Wang)
    - Use cached pci_dev->pcie_mpss to simplify code (Yijing Wang)

  SR-IOV
    - Enable upstream bridges even for VFs on virtual buses (Bjorn Helgaas)
    - Use pci_is_root_bus() to avoid catching virtual buses (Wei Yang)

  Virtualization
    - Add x86 MSI masking ops (Konrad Rzeszutek Wilk)

  Freescale i.MX6
    - Support i.MX6 PCIe controller (Sean Cross)
    - Increase link startup timeout (Marek Vasut)
    - Probe PCIe in fs_initcall() (Marek Vasut)
    - Fix imprecise abort handler (Tim Harvey)
    - Remove redundant of_match_ptr (Sachin Kamat)

  Renesas R-Car
    - Support Gen2 internal PCIe controller (Valentine Barshak)

  Samsung Exynos
    - Add MSI support (Jingoo Han)
    - Turn off power when link fails (Jingoo Han)
    - Add Jingoo Han as maintainer (Jingoo Han)
    - Add clk_disable_unprepare() on error path (Wei Yongjun)
    - Remove redundant of_match_ptr (Sachin Kamat)

  Synopsys DesignWare
    - Add irq_create_mapping() (Pratyush Anand)
    - Add header guards (Seungwon Jeon)

  Miscellaneous
    - Enable native PCIe services by default on non-ACPI (Andrew Murray)
    - Cleanup _OSC usage and messages (Bjorn Helgaas)
    - Remove pcibios_last_bus boot option on non-x86 (Bjorn Helgaas)
    - Convert bus code to use bus_, drv_, and dev_groups (Greg Kroah-Hartman)
    - Remove unused pci_mem_start (Myron Stowe)
    - Make sysfs functions static (Sachin Kamat)
    - Warn on invalid return from driver probe (Stephen M. Cameron)
    - Remove Intel Haswell D3 delays (Todd E Brandt)
    - Call pci_set_master() in core if driver doesn't do it (Yinghai Lu)
    - Use pci_is_pcie() to simplify code (Yijing Wang)
    - Use PCIe capability accessors to simplify code (Yijing Wang)
    - Use cached pci_dev->pcie_cap to simplify code (Yijing Wang)
    - Removed unused "is_pcie" from struct pci_dev (Yijing Wang)
    - Simplify sysfs CPU affinity implementation (Yijing Wang)"

* tag 'pci-v3.13-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (79 commits)
  PCI: Enable upstream bridges even for VFs on virtual buses
  PCI: Add pci_upstream_bridge()
  PCI: Add x86_msi.msi_mask_irq() and msix_mask_irq()
  PCI: Warn on driver probe return value greater than zero
  PCI: Drop warning about drivers that don't use pci_set_master()
  PCI: Workaround missing pci_set_master in pci drivers
  powerpc/pci: Use pci_is_pcie() to simplify code [fix]
  PCI: Update pcie_ports 'auto' behavior for non-ACPI platforms
  PCI: imx6: Probe the PCIe in fs_initcall()
  PCI: Add R-Car Gen2 internal PCI support
  PCI: imx6: Remove redundant of_match_ptr
  PCI: Report pci_pme_active() kmalloc failure
  mn10300/PCI: Remove useless pcibios_last_bus
  frv/PCI: Remove pcibios_last_bus
  PCI: imx6: Increase link startup timeout
  PCI: exynos: Remove redundant of_match_ptr
  PCI: imx6: Fix imprecise abort handler
  PCI: Fail MSI/MSI-X initialization if device is not in PCI_D0
  PCI: imx6: Remove redundant dev_err() in imx6_pcie_probe()
  x86/PCI: Coalesce multiple overlapping host bridge windows
  ...
 2013-11-14 14:02:00 +09:00
Linus Torvalds
f9300eaaac ACPI and power management updates for 3.13-rc1 
- New power capping framework and the the Intel Running Average Power
    Limit (RAPL) driver using it from Srinivas Pandruvada and Jacob Pan.
 
  - Addition of the in-kernel switching feature to the arm_big_little
    cpufreq driver from Viresh Kumar and Nicolas Pitre.
 
  - cpufreq support for iMac G5 from Aaro Koskinen.
 
  - Baytrail processors support for intel_pstate from Dirk Brandewie.
 
  - cpufreq support for Midway/ECX-2000 from Mark Langsdorf.
 
  - ARM vexpress/TC2 cpufreq support from Sudeep KarkadaNagesha.
 
  - ACPI power management support for the I2C and SPI bus types from
    Mika Westerberg and Lv Zheng.
 
  - cpufreq core fixes and cleanups from Viresh Kumar, Srivatsa S Bhat,
    Stratos Karafotis, Xiaoguang Chen, Lan Tianyu.
 
  - cpufreq drivers updates (mostly fixes and cleanups) from Viresh Kumar,
    Aaro Koskinen, Jungseok Lee, Sudeep KarkadaNagesha, Lukasz Majewski,
    Manish Badarkhe, Hans-Christian Egtvedt, Evgeny Kapaev.
 
  - intel_pstate updates from Dirk Brandewie and Adrian Huang.
 
  - ACPICA update to version 20130927 includig fixes and cleanups and
    some reduction of divergences between the ACPICA code in the kernel
    and ACPICA upstream in order to improve the automatic ACPICA patch
    generation process.  From Bob Moore, Lv Zheng, Tomasz Nowicki,
    Naresh Bhat, Bjorn Helgaas, David E Box.
 
  - ACPI IPMI driver fixes and cleanups from Lv Zheng.
 
  - ACPI hotplug fixes and cleanups from Bjorn Helgaas, Toshi Kani,
    Zhang Yanfei, Rafael J Wysocki.
 
  - Conversion of the ACPI AC driver to the platform bus type and
    multiple driver fixes and cleanups related to ACPI from Zhang Rui.
 
  - ACPI processor driver fixes and cleanups from Hanjun Guo, Jiang Liu,
    Bartlomiej Zolnierkiewicz, Mathieu Rhéaume, Rafael J Wysocki.
 
  - Fixes and cleanups and new blacklist entries related to the ACPI
    video support from Aaron Lu, Felipe Contreras, Lennart Poettering,
    Kirill Tkhai.
 
  - cpuidle core cleanups from Viresh Kumar and Lorenzo Pieralisi.
 
  - cpuidle drivers fixes and cleanups from Daniel Lezcano, Jingoo Han,
    Bartlomiej Zolnierkiewicz, Prarit Bhargava.
 
  - devfreq updates from Sachin Kamat, Dan Carpenter, Manish Badarkhe.
 
  - Operation Performance Points (OPP) core updates from Nishanth Menon.
 
  - Runtime power management core fix from Rafael J Wysocki and update
    from Ulf Hansson.
 
  - Hibernation fixes from Aaron Lu and Rafael J Wysocki.
 
  - Device suspend/resume lockup detection mechanism from Benoit Goby.
 
  - Removal of unused proc directories created for various ACPI drivers
    from Lan Tianyu.
 
  - ACPI LPSS driver fix and new device IDs for the ACPI platform scan
    handler from Heikki Krogerus and Jarkko Nikula.
 
  - New ACPI _OSI blacklist entry for Toshiba NB100 from Levente Kurusa.
 
  - Assorted fixes and cleanups related to ACPI from Andy Shevchenko,
    Al Stone, Bartlomiej Zolnierkiewicz, Colin Ian King, Dan Carpenter,
    Felipe Contreras, Jianguo Wu, Lan Tianyu, Yinghai Lu, Mathias Krause,
    Liu Chuansheng.
 
  - Assorted PM fixes and cleanups from Andy Shevchenko, Thierry Reding,
    Jean-Christophe Plagniol-Villard.
 
 /
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Merge tag 'pm+acpi-3.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI and power management updates from Rafael J Wysocki:

 - New power capping framework and the the Intel Running Average Power
   Limit (RAPL) driver using it from Srinivas Pandruvada and Jacob Pan.

 - Addition of the in-kernel switching feature to the arm_big_little
   cpufreq driver from Viresh Kumar and Nicolas Pitre.

 - cpufreq support for iMac G5 from Aaro Koskinen.

 - Baytrail processors support for intel_pstate from Dirk Brandewie.

 - cpufreq support for Midway/ECX-2000 from Mark Langsdorf.

 - ARM vexpress/TC2 cpufreq support from Sudeep KarkadaNagesha.

 - ACPI power management support for the I2C and SPI bus types from Mika
   Westerberg and Lv Zheng.

 - cpufreq core fixes and cleanups from Viresh Kumar, Srivatsa S Bhat,
   Stratos Karafotis, Xiaoguang Chen, Lan Tianyu.

 - cpufreq drivers updates (mostly fixes and cleanups) from Viresh
   Kumar, Aaro Koskinen, Jungseok Lee, Sudeep KarkadaNagesha, Lukasz
   Majewski, Manish Badarkhe, Hans-Christian Egtvedt, Evgeny Kapaev.

 - intel_pstate updates from Dirk Brandewie and Adrian Huang.

 - ACPICA update to version 20130927 includig fixes and cleanups and
   some reduction of divergences between the ACPICA code in the kernel
   and ACPICA upstream in order to improve the automatic ACPICA patch
   generation process.  From Bob Moore, Lv Zheng, Tomasz Nowicki, Naresh
   Bhat, Bjorn Helgaas, David E Box.

 - ACPI IPMI driver fixes and cleanups from Lv Zheng.

 - ACPI hotplug fixes and cleanups from Bjorn Helgaas, Toshi Kani, Zhang
   Yanfei, Rafael J Wysocki.

 - Conversion of the ACPI AC driver to the platform bus type and
   multiple driver fixes and cleanups related to ACPI from Zhang Rui.

 - ACPI processor driver fixes and cleanups from Hanjun Guo, Jiang Liu,
   Bartlomiej Zolnierkiewicz, Mathieu Rhéaume, Rafael J Wysocki.

 - Fixes and cleanups and new blacklist entries related to the ACPI
   video support from Aaron Lu, Felipe Contreras, Lennart Poettering,
   Kirill Tkhai.

 - cpuidle core cleanups from Viresh Kumar and Lorenzo Pieralisi.

 - cpuidle drivers fixes and cleanups from Daniel Lezcano, Jingoo Han,
   Bartlomiej Zolnierkiewicz, Prarit Bhargava.

 - devfreq updates from Sachin Kamat, Dan Carpenter, Manish Badarkhe.

 - Operation Performance Points (OPP) core updates from Nishanth Menon.

 - Runtime power management core fix from Rafael J Wysocki and update
   from Ulf Hansson.

 - Hibernation fixes from Aaron Lu and Rafael J Wysocki.

 - Device suspend/resume lockup detection mechanism from Benoit Goby.

 - Removal of unused proc directories created for various ACPI drivers
   from Lan Tianyu.

 - ACPI LPSS driver fix and new device IDs for the ACPI platform scan
   handler from Heikki Krogerus and Jarkko Nikula.

 - New ACPI _OSI blacklist entry for Toshiba NB100 from Levente Kurusa.

 - Assorted fixes and cleanups related to ACPI from Andy Shevchenko, Al
   Stone, Bartlomiej Zolnierkiewicz, Colin Ian King, Dan Carpenter,
   Felipe Contreras, Jianguo Wu, Lan Tianyu, Yinghai Lu, Mathias Krause,
   Liu Chuansheng.

 - Assorted PM fixes and cleanups from Andy Shevchenko, Thierry Reding,
   Jean-Christophe Plagniol-Villard.

* tag 'pm+acpi-3.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (386 commits)
  cpufreq: conservative: fix requested_freq reduction issue
  ACPI / hotplug: Consolidate deferred execution of ACPI hotplug routines
  PM / runtime: Use pm_runtime_put_sync() in __device_release_driver()
  ACPI / event: remove unneeded NULL pointer check
  Revert "ACPI / video: Ignore BIOS initial backlight value for HP 250 G1"
  ACPI / video: Quirk initial backlight level 0
  ACPI / video: Fix initial level validity test
  intel_pstate: skip the driver if ACPI has power mgmt option
  PM / hibernate: Avoid overflow in hibernate_preallocate_memory()
  ACPI / hotplug: Do not execute "insert in progress" _OST
  ACPI / hotplug: Carry out PCI root eject directly
  ACPI / hotplug: Merge device hot-removal routines
  ACPI / hotplug: Make acpi_bus_hot_remove_device() internal
  ACPI / hotplug: Simplify device ejection routines
  ACPI / hotplug: Fix handle_root_bridge_removal()
  ACPI / hotplug: Refuse to hot-remove all objects with disabled hotplug
  ACPI / scan: Start matching drivers after trying scan handlers
  ACPI: Remove acpi_pci_slot_init() headers from internal.h
  ACPI / blacklist: fix name of ThinkPad Edge E530
  PowerCap: Fix build error with option -Werror=format-security
  ...

Conflicts:
	arch/arm/mach-omap2/opp.c
	drivers/Kconfig
	drivers/spi/spi.c
 2013-11-14 13:41:48 +09:00
Linus Torvalds
7f2dc5c4bc A set of device-mapper changes for 3.13. 
Improve reliability of buffer allocations for dm messages with a small
 number of arguments, a couple path group initialization fixes for dm
 multipath, a fix for resizing a dm array, various fixes and
 optimizations for dm cache, a fix for device mapper's Kconfig menu
 indentation.
 
 Features added include:
 - dm crypt support for activating legacy CBC TrueCrypt containers
   (useful for forensics of these old TCRYPT containers)
 - reduced dm-cache memory requirements for each block in the cache
 - basic support for shrinking a dm-cache's cache (fast) device
 - most notably, dm-cache support for managing cache coherency when
   deploying dm-cache with sophisticated origin volumes (that support
   hardware snapshots and/or clustering): these changes come in the form
   of a new passthrough operation mode and a cache block invalidation
   interface.
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Merge tag 'dm-3.13-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm

Pull device mapper changes from Mike Snitzer:
 "A set of device-mapper changes for 3.13.

  Improve reliability of buffer allocations for dm messages with a small
  number of arguments, a couple path group initialization fixes for dm
  multipath, a fix for resizing a dm array, various fixes and
  optimizations for dm cache, a fix for device mapper's Kconfig menu
  indentation.

  Features added include:
   - dm crypt support for activating legacy CBC TrueCrypt containers
     (useful for forensics of these old TCRYPT containers)
   - reduced dm-cache memory requirements for each block in the cache
   - basic support for shrinking a dm-cache's cache (fast) device
   - most notably, dm-cache support for managing cache coherency when
     deploying dm-cache with sophisticated origin volumes (that support
     hardware snapshots and/or clustering): these changes come in the
     form of a new passthrough operation mode and a cache block
     invalidation interface"

* tag 'dm-3.13-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: (32 commits)
  dm cache: resolve small nits and improve Documentation
  dm cache: add cache block invalidation support
  dm cache: add remove_cblock method to policy interface
  dm cache policy mq: reduce memory requirements
  dm cache metadata: check the metadata version when reading the superblock
  dm cache: add passthrough mode
  dm cache: cache shrinking support
  dm cache: promotion optimisation for writes
  dm cache: be much more aggressive about promoting writes to discarded blocks
  dm cache policy mq: implement writeback_work() and mq_{set,clear}_dirty()
  dm cache: optimize commit_if_needed
  dm space map disk: optimise sm_disk_dec_block
  MAINTAINERS: add reference to device-mapper's linux-dm.git tree
  dm: fix Kconfig menu indentation
  dm: allow remove to be deferred
  dm table: print error on preresume failure
  dm crypt: add TCW IV mode for old CBC TCRYPT containers
  dm crypt: properly handle extra key string in initialization
  dm cache: log error message if dm_kcopyd_copy() fails
  dm cache: use cell_defer() boolean argument consistently
  ...
 2013-11-14 12:35:48 +09:00
Linus Torvalds
82cb6acea4 MTD merge for 3.13 
* Unify some compile-time differences so that we have fewer uses of
    #ifdef CONFIG_OF in atmel_nand
  * Other general cleanups (removing unused functions, options, variables,
    fields; use correct interfaces)
  * Fix BUG() for new odd-sized NAND, which report non-power-of-2 dimensions via
    ONFI
  * Miscellaneous driver fixes (SPI NOR flash; BCM47xx NAND flash; etc.)
  * Improve differentiation between SLC and MLC NAND -- this clarifies an ABI
    issue regarding the MTD "type" (in sysfs and in ioctl(MEMGETINFO)), where
    the MTD_MLCNANDFLASH type was present but inconsistently used
  * Extend GPMI NAND to support multi-chip-select NAND for some platforms
  * Many improvements to the OMAP2/3 NAND driver, including an expanded DT
    binding to bring us closer to mainline support for some OMAP systems
  * Fix a deadlock in the error path of the Atmel NAND driver probe
  * Correct the error codes from MTD mmap() to conform to POSIX and the Linux
    Programmer's Manual. This is an acknowledged change in the MTD ABI, but I
    can't imagine somebody relying on the non-standard -ENOSYS error code
    specifically. Am I just being unimaginative? :)
  * Fix a few important GPMI NAND bugs (one regression from 3.12 and one
    long-standing race condition)
  * More? Read the log!
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Merge tag 'for-linus-20131112' of git://git.infradead.org/linux-mtd

Pull MTD changes from Brian Norris:
 - Unify some compile-time differences so that we have fewer uses of
   #ifdef CONFIG_OF in atmel_nand
 - Other general cleanups (removing unused functions, options,
   variables, fields; use correct interfaces)
 - Fix BUG() for new odd-sized NAND, which report non-power-of-2
   dimensions via ONFI
 - Miscellaneous driver fixes (SPI NOR flash; BCM47xx NAND flash; etc.)
 - Improve differentiation between SLC and MLC NAND -- this clarifies an
   ABI issue regarding the MTD "type" (in sysfs and in the MEMGETINFO
   ioctl), where the MTD_MLCNANDFLASH type was present but
   inconsistently used
 - Extend GPMI NAND to support multi-chip-select NAND for some platforms
 - Many improvements to the OMAP2/3 NAND driver, including an expanded
   DT binding to bring us closer to mainline support for some OMAP
   systems
 - Fix a deadlock in the error path of the Atmel NAND driver probe
 - Correct the error codes from MTD mmap() to conform to POSIX and the
   Linux Programmer's Manual.  This is an acknowledged change in the MTD
   ABI, but I can't imagine somebody relying on the non-standard -ENOSYS
   error code specifically.  Am I just being unimaginative? :)
 - Fix a few important GPMI NAND bugs (one regression from 3.12 and one
   long-standing race condition)
 - More? Read the log!

* tag 'for-linus-20131112' of git://git.infradead.org/linux-mtd: (98 commits)
  mtd: gpmi: fix the NULL pointer
  mtd: gpmi: fix kernel BUG due to racing DMA operations
  mtd: mtdchar: return expected errors on mmap() call
  mtd: gpmi: only scan two chips for imx6
  mtd: gpmi: Use devm_kzalloc()
  mtd: atmel_nand: fix bug driver will in a dead lock if no nand detected
  mtd: nand: use a local variable to simplify the nand_scan_tail
  mtd: nand: remove deprecated IRQF_DISABLED
  mtd: dataflash: Say if we find a device we don't support
  mtd: nand: omap: fix error return code in omap_nand_probe()
  mtd: nand_bbt: kill NAND_BBT_SCANALLPAGES
  mtd: m25p80: fixup device removal failure path
  mtd: mxc_nand: Include linux/of.h header
  mtd: remove duplicated include from mtdcore.c
  mtd: m25p80: add support for Macronix mx25l3255e
  mtd: nand: omap: remove selection of BCH ecc-scheme via KConfig
  mtd: nand: omap: updated devm_xx for all resource allocation and free calls
  mtd: nand: omap: use drivers/mtd/nand/nand_bch.c wrapper for BCH ECC instead of lib/bch.c
  mtd: nand: omap: clean-up ecc layout for BCH ecc schemes
  mtd: nand: omap2: clean-up BCHx_HW and BCHx_SW ECC configurations in device_probe
  ...
 2013-11-14 12:31:43 +09:00
Linus Torvalds
0d522ee749 SCSI for-linus on 20131110 
This patch set is driver updates for qla4xxx, scsi_debug, pm80xx, fcoe/libfc,
 eas2r, lpfc, be2iscsi and megaraid_sas plus some assorted bug fixes and
 cleanups.
 
 Signed-off-by: James Bottomley <JBottomley@Parallels.com>
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Merge tag 'scsi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull first round of SCSI updates from James Bottomley:
 "This patch set is driver updates for qla4xxx, scsi_debug, pm80xx,
  fcoe/libfc, eas2r, lpfc, be2iscsi and megaraid_sas plus some assorted
  bug fixes and cleanups"

* tag 'scsi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (106 commits)
  [SCSI] scsi_error: Escalate to LUN reset if abort fails
  [SCSI] Add 'eh_deadline' to limit SCSI EH runtime
  [SCSI] remove check for 'resetting'
  [SCSI] dc395: Move 'last_reset' into internal host structure
  [SCSI] tmscsim: Move 'last_reset' into host structure
  [SCSI] advansys: Remove 'last_reset' references
  [SCSI] dpt_i2o: return SCSI_MLQUEUE_HOST_BUSY when in reset
  [SCSI] dpt_i2o: Remove DPTI_STATE_IOCTL
  [SCSI] megaraid_sas: Fix synchronization problem between sysPD IO path and AEN path
  [SCSI] lpfc: Fix typo on NULL assignment
  [SCSI] scsi_dh_alua: ALUA handler attach should succeed while TPG is transitioning
  [SCSI] scsi_dh_alua: ALUA check sense should retry device internal reset unit attention
  [SCSI] esas2r: Cleanup snprinf formatting of firmware version
  [SCSI] esas2r: Remove superfluous mask of pcie_cap_reg
  [SCSI] esas2r: Fixes for big-endian platforms
  [SCSI] esas2r: Directly call kernel functions for atomic bit operations
  [SCSI] lpfc 8.3.43: Update lpfc version to driver version 8.3.43
  [SCSI] lpfc 8.3.43: Fixed not processing task management IOCB response status
  [SCSI] lpfc 8.3.43: Fixed spinlock hang.
  [SCSI] lpfc 8.3.43: Fixed invalid Total_Data_Placed value received for els and ct command responses
  ...
 2013-11-14 12:25:38 +09:00
Linus Torvalds
5eea9be8b2 Merge branch 'for-3.13/drivers' of git://git.kernel.dk/linux-block 
Pull block driver updates from Jens Axboe:
 "This is the block driver pull request for 3.13.  As with the core pull
  request just sent out, this was rebased on top of the core branch
  again after the immutable series was pulled.  This also means that
  bcache gets to sit the initial pull over.  I will send a second driver
  pull request in the merge window to get those fixes in, once they have
  been rebased and tested on top of the non-immutable stack.

  This pull request contains:

   - Add support for the sTec Kronos pci-e flash card from sTec.  Also
     has various cleanups for this driver, from myself, Bart, Mike
     Snizter, and Wei Yongjun.

   - Add surprise removal support for the micron mtip32xx driver from
     Micron.

   - Floppy documentation fix from Ben Harris.

   - debugfs bug fix for pktcdvd from Dan Carpenter.

   - Fix for the mtip32xx driver stack usage in the debugfs path,
     dynamically allocating those buffers instead.  From David Milburn.

   - Disable cpqarray in Kconfig.  The plan is to remove it on request
     of HP, but lets disable it for a few revisions just to see if
     anyone yells.

   - drbd fixes from Lars Ellenberg and Philipp Reisner.

   - Elevator switch fix for the s390 block driver from Heiko Carstens.

   - loop crash fix on IO to unassigned device from Mikulas Patocka.

   - A series of bug fixes for the IBM rsxx pci-e flash driver from
     Philip J Kelleher.

   - cciss probe fix from Stephen Cameron.

   - Xen block front/back fixes from Roger Pau Monne and Vegard Nossum"

* 'for-3.13/drivers' of git://git.kernel.dk/linux-block: (41 commits)
  floppy: Correct documentation of driver options when used as a module.
  pktcdvd: debugfs functions return NULL on error
  xen-blkfront: restore the non-persistent data path
  skd: fix formatting in skd_s1120.h
  skd: reorder construct/destruct code
  skd: cleanup skd_do_inq_page_da()
  skd: remove SKD_OMIT_FROM_SRC_DIST ifdefs
  skd: remove redundant skdev->pdev assignment from skd_pci_probe()
  skd: use <asm/unaligned.h>
  skd: remove SCSI subsystem specific includes
  skd: register block device only if some devices are present
  skd: fix error messages in skd_init()
  skd: fix error paths in skd_init()
  skd: fix unregister_blkdev() placement
  skd: more removal of bio-based code
  skd: cleanup the skd_*() function block wrapping
  skd: rip out bio path
  skd: fix error return code in skd_pci_probe()
  s390/dasd: hold request queue sysfs lock when calling elevator_init()
  cciss: return 0 from driver probe function on success, not 1
  ...
 2013-11-14 12:13:05 +09:00
Linus Torvalds
0910c0bdf7 Merge branch 'for-3.13/core' of git://git.kernel.dk/linux-block 
Pull block IO core updates from Jens Axboe:
 "This is the pull request for the core changes in the block layer for
  3.13.  It contains:

   - The new blk-mq request interface.

     This is a new and more scalable queueing model that marries the
     best part of the request based interface we currently have (which
     is fully featured, but scales poorly) and the bio based "interface"
     which the new drivers for high IOPS devices end up using because
     it's much faster than the request based one.

     The bio interface has no block layer support, since it taps into
     the stack much earlier.  This means that drivers end up having to
     implement a lot of functionality on their own, like tagging,
     timeout handling, requeue, etc.  The blk-mq interface provides all
     these.  Some drivers even provide a switch to select bio or rq and
     has code to handle both, since things like merging only works in
     the rq model and hence is faster for some workloads.  This is a
     huge mess.  Conversion of these drivers nets us a substantial code
     reduction.  Initial results on converting SCSI to this model even
     shows an 8x improvement on single queue devices.  So while the
     model was intended to work on the newer multiqueue devices, it has
     substantial improvements for "classic" hardware as well.  This code
     has gone through extensive testing and development, it's now ready
     to go.  A pull request is coming to convert virtio-blk to this
     model will be will be coming as well, with more drivers scheduled
     for 3.14 conversion.

   - Two blktrace fixes from Jan and Chen Gang.

   - A plug merge fix from Alireza Haghdoost.

   - Conversion of __get_cpu_var() from Christoph Lameter.

   - Fix for sector_div() with 64-bit divider from Geert Uytterhoeven.

   - A fix for a race between request completion and the timeout
     handling from Jeff Moyer.  This is what caused the merge conflict
     with blk-mq/core, in case you are looking at that.

   - A dm stacking fix from Mike Snitzer.

   - A code consolidation fix and duplicated code removal from Kent
     Overstreet.

   - A handful of block bug fixes from Mikulas Patocka, fixing a loop
     crash and memory corruption on blk cg.

   - Elevator switch bug fix from Tomoki Sekiyama.

  A heads-up that I had to rebase this branch.  Initially the immutable
  bio_vecs had been queued up for inclusion, but a week later, it became
  clear that it wasn't fully cooked yet.  So the decision was made to
  pull this out and postpone it until 3.14.  It was a straight forward
  rebase, just pruning out the immutable series and the later fixes of
  problems with it.  The rest of the patches applied directly and no
  further changes were made"

* 'for-3.13/core' of git://git.kernel.dk/linux-block: (31 commits)
  block: replace IS_ERR and PTR_ERR with PTR_ERR_OR_ZERO
  block: replace IS_ERR and PTR_ERR with PTR_ERR_OR_ZERO
  block: Do not call sector_div() with a 64-bit divisor
  kernel: trace: blktrace: remove redundent memcpy() in compat_blk_trace_setup()
  block: Consolidate duplicated bio_trim() implementations
  block: Use rw_copy_check_uvector()
  block: Enable sysfs nomerge control for I/O requests in the plug list
  block: properly stack underlying max_segment_size to DM device
  elevator: acquire q->sysfs_lock in elevator_change()
  elevator: Fix a race in elevator switching and md device initialization
  block: Replace __get_cpu_var uses
  bdi: test bdi_init failure
  block: fix a probe argument to blk_register_region
  loop: fix crash if blk_alloc_queue fails
  blk-core: Fix memory corruption if blkcg_init_queue fails
  block: fix race between request completion and timeout handling
  blktrace: Send BLK_TN_PROCESS events to all running traces
  blk-mq: don't disallow request merges for req->special being set
  blk-mq: mq plug list breakage
  blk-mq: fix for flush deadlock
  ...
 2013-11-14 12:08:14 +09:00
Linus Torvalds
2821fe6b00 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 
Pull VFS fixes from Al Viro:
 "Several fixes, mostly for regressions in the last pile.  Howeover,
  prepend_path() forgetting to reininitalize dentry/vfsmount is in 3.12
  as well and qib_fs had been leaking all along..."

The unpaired RCU lock issue was also independently reported by Dave
Jones with his fuzzer tool..

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  qib_fs: fix (some) dcache abuses
  prepend_path() needs to reinitialize dentry/vfsmount/mnt on restarts
  fix unpaired rcu lock in prepend_path()
  locks: missing unlock on error in generic_add_lease()
  aio: checking for NULL instead of IS_ERR
 2013-11-14 08:56:27 +09:00
Linus Torvalds
f47671e2d8 Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 
Pull ARM updates from Russell King:
 "Included in this series are:

   1. BE8 (modern big endian) changes for ARM from Ben Dooks
   2. big.Little support from Nicolas Pitre and Dave Martin
   3. support for LPAE systems with all system memory above 4GB
   4. Perf updates from Will Deacon
   5. Additional prefetching and other performance improvements from Will.
   6. Neon-optimised AES implementation fro Ard.
   7. A number of smaller fixes scattered around the place.

  There is a rather horrid merge conflict in tools/perf - I was never
  notified of the conflict because it originally occurred between Will's
  tree and other stuff.  Consequently I have a resolution which Will
  forwarded me, which I'll forward on immediately after sending this
  mail.

  The other notable thing is I'm expecting some build breakage in the
  crypto stuff on ARM only with Ard's AES patches.  These were merged
  into a stable git branch which others had already pulled, so there's
  little I can do about this.  The problem is caused because these
  patches have a dependency on some code in the crypto git tree - I
  tried requesting a branch I can pull to resolve these, and all I got
  each time from the crypto people was "we'll revert our patches then"
  which would only make things worse since I still don't have the
  dependent patches.  I've no idea what's going on there or how to
  resolve that, and since I can't split these patches from the rest of
  this pull request, I'm rather stuck with pushing this as-is or
  reverting Ard's patches.

  Since it should "come out in the wash" I've left them in - the only
  build problems they seem to cause at the moment are with randconfigs,
  and since it's a new feature anyway.  However, if by -rc1 the
  dependencies aren't in, I think it'd be best to revert Ard's patches"

I resolved the perf conflict roughly as per the patch sent by Russell,
but there may be some differences.  Any errors are likely mine.  Let's
see how the crypto issues work out..

* 'for-linus' of git://git.linaro.org/people/rmk/linux-arm: (110 commits)
  ARM: 7868/1: arm/arm64: remove atomic_clear_mask() in "include/asm/atomic.h"
  ARM: 7867/1: include: asm: use 'int' instead of 'unsigned long' for 'oldval' in atomic_cmpxchg().
  ARM: 7866/1: include: asm: use 'long long' instead of 'u64' within atomic.h
  ARM: 7871/1: amba: Extend number of IRQS
  ARM: 7887/1: Don't smp_cross_call() on UP devices in arch_irq_work_raise()
  ARM: 7872/1: Support arch_irq_work_raise() via self IPIs
  ARM: 7880/1: Clear the IT state independent of the Thumb-2 mode
  ARM: 7878/1: nommu: Implement dummy early_paging_init()
  ARM: 7876/1: clear Thumb-2 IT state on exception handling
  ARM: 7874/2: bL_switcher: Remove cpu_hotplug_driver_{lock,unlock}()
  ARM: footbridge: fix build warnings for netwinder
  ARM: 7873/1: vfp: clear vfp_current_hw_state for dying cpu
  ARM: fix misplaced arch_virt_to_idmap()
  ARM: 7848/1: mcpm: Implement cpu_kill() to synchronise on powerdown
  ARM: 7847/1: mcpm: Factor out logical-to-physical CPU translation
  ARM: 7869/1: remove unused XSCALE_PMU Kconfig param
  ARM: 7864/1: Handle 64-bit memory in case of 32-bit phys_addr_t
  ARM: 7863/1: Let arm_add_memory() always use 64-bit arguments
  ARM: 7862/1: pcpu: replace __get_cpu_var_uses
  ARM: 7861/1: cacheflush: consolidate single-CPU ARMv7 cache disabling code
  ...
 2013-11-14 08:51:29 +09:00
Linus Torvalds
8ceafbfa91 Merge branch 'for-linus-dma-masks' of git://git.linaro.org/people/rmk/linux-arm 
Pull DMA mask updates from Russell King:
 "This series cleans up the handling of DMA masks in a lot of drivers,
  fixing some bugs as we go.

  Some of the more serious errors include:
   - drivers which only set their coherent DMA mask if the attempt to
     set the streaming mask fails.
   - drivers which test for a NULL dma mask pointer, and then set the
     dma mask pointer to a location in their module .data section -
     which will cause problems if the module is reloaded.

  To counter these, I have introduced two helper functions:
   - dma_set_mask_and_coherent() takes care of setting both the
     streaming and coherent masks at the same time, with the correct
     error handling as specified by the API.
   - dma_coerce_mask_and_coherent() which resolves the problem of
     drivers forcefully setting DMA masks.  This is more a marker for
     future work to further clean these locations up - the code which
     creates the devices really should be initialising these, but to fix
     that in one go along with this change could potentially be very
     disruptive.

  The last thing this series does is prise away some of Linux's addition
  to "DMA addresses are physical addresses and RAM always starts at
  zero".  We have ARM LPAE systems where all system memory is above 4GB
  physical, hence having DMA masks interpreted by (eg) the block layers
  as describing physical addresses in the range 0..DMAMASK fails on
  these platforms.  Santosh Shilimkar addresses this in this series; the
  patches were copied to the appropriate people multiple times but were
  ignored.

  Fixing this also gets rid of some ARM weirdness in the setup of the
  max*pfn variables, and brings ARM into line with every other Linux
  architecture as far as those go"

* 'for-linus-dma-masks' of git://git.linaro.org/people/rmk/linux-arm: (52 commits)
  ARM: 7805/1: mm: change max*pfn to include the physical offset of memory
  ARM: 7797/1: mmc: Use dma_max_pfn(dev) helper for bounce_limit calculations
  ARM: 7796/1: scsi: Use dma_max_pfn(dev) helper for bounce_limit calculations
  ARM: 7795/1: mm: dma-mapping: Add dma_max_pfn(dev) helper function
  ARM: 7794/1: block: Rename parameter dma_mask to max_addr for blk_queue_bounce_limit()
  ARM: DMA-API: better handing of DMA masks for coherent allocations
  ARM: 7857/1: dma: imx-sdma: setup dma mask
  DMA-API: firmware/google/gsmi.c: avoid direct access to DMA masks
  DMA-API: dcdbas: update DMA mask handing
  DMA-API: dma: edma.c: no need to explicitly initialize DMA masks
  DMA-API: usb: musb: use platform_device_register_full() to avoid directly messing with dma masks
  DMA-API: crypto: remove last references to 'static struct device *dev'
  DMA-API: crypto: fix ixp4xx crypto platform device support
  DMA-API: others: use dma_set_coherent_mask()
  DMA-API: staging: use dma_set_coherent_mask()
  DMA-API: usb: use new dma_coerce_mask_and_coherent()
  DMA-API: usb: use dma_set_coherent_mask()
  DMA-API: parport: parport_pc.c: use dma_coerce_mask_and_coherent()
  DMA-API: net: octeon: use dma_coerce_mask_and_coherent()
  DMA-API: net: nxp/lpc_eth: use dma_coerce_mask_and_coherent()
  ...
 2013-11-14 07:55:21 +09:00
Al Viro
441a9d0e1e qib_fs: fix (some) dcache abuses 
* lookup_one_len() really wants i_mutex held on directory.
* leaks galore - just mount ipathfs, then
cd /sys/bus/pci/drivers/qib_ib; echo *:*:*.* >unbind
on a box with that card present and try to umount ipathfs...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2013-11-13 08:08:19 -05:00
Peter Zijlstra
90d3839b90 block: Use u64_stats_init() to initialize seqcounts 
Now that seqcounts are lockdep enabled objects, we need to explicitly
initialize runtime allocated seqcounts so that lockdep can track them.

Without this patch, Fengguang was seeing:

  [    4.127282] INFO: trying to register non-static key.
  [    4.128027] the code is fine but needs lockdep annotation.
  [    4.128027] turning off the locking correctness validator.
  [    4.128027] CPU: 0 PID: 96 Comm: kworker/u4:1 Not tainted 3.12.0-next-20131108-10601-gbad570d #2
  [    4.128027] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
  [    ...     ]
  [    4.128027] Call Trace:
  [    4.128027]  [<7908e744>] ? console_unlock+0x353/0x380
  [    4.128027]  [<79dc7cf2>] dump_stack+0x48/0x60
  [    4.128027]  [<7908953e>] __lock_acquire.isra.26+0x7e3/0xceb
  [    4.128027]  [<7908a1c5>] lock_acquire+0x71/0x9a
  [    4.128027]  [<794079aa>] ? blk_throtl_bio+0x1c3/0x485
  [    4.128027]  [<7940658b>] throtl_update_dispatch_stats+0x7c/0x153
  [    4.128027]  [<794079aa>] ? blk_throtl_bio+0x1c3/0x485
  [    4.128027]  [<794079aa>] blk_throtl_bio+0x1c3/0x485
  ...

Use u64_stats_init() for all affected data structures, which initializes
the seqcount.

Reported-and-Tested-by: Fengguang Wu <fengguang.wu@intel.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
[ Folded in another fix from the mailing list as well as a fix to that fix. Tweaked commit message. ]
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1384314134-6895-1-git-send-email-john.stultz@linaro.org
[ So I actually think that the two SOBs from PeterZ are the right depiction of the patch route. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2013-11-13 13:54:08 +01:00
Fengguang Wu
5216d530bb locking/lockdep: Mark __lockdep_count_forward_deps() as static 
There are new Sparse warnings:

  >> kernel/locking/lockdep.c:1235:15: sparse: symbol '__lockdep_count_forward_deps' was not declared. Should it be static?
  >> kernel/locking/lockdep.c:1261:15: sparse: symbol '__lockdep_count_backward_deps' was not declared. Should it be static?

Please consider folding the attached diff :-)

Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/527d1787.ThzXGoUspZWehFDl\%fengguang.wu@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2013-11-13 13:50:17 +01:00
Al Viro
ede4cebce1 prepend_path() needs to reinitialize dentry/vfsmount/mnt on restarts 
... and equivalent is needed in 3.12; it's broken there as well

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2013-11-13 07:45:40 -05:00
Li Zhong
4ec6c2aeab fix unpaired rcu lock in prepend_path() 
Signed-off-by: Li Zhong <zhong@linux.vnet.ibm.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2013-11-13 07:43:10 -05:00
Michal Nazarewicz
85b088e934 sched/fair: Avoid integer overflow 
sa->runnable_avg_sum is of type u32 but after shifting it by NICE_0_SHIFT
bits it is promoted to u64.  This of course makes no sense, since the
result will never be more then 32-bit long.  Casting sa->runnable_avg_sum
to u64 before it is shifted, fixes this problem.

Reviewed-by: Ben Segall <bsegall@google.com>
Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1384112521-25177-1-git-send-email-mpn@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2013-11-13 13:33:55 +01:00
Peter Zijlstra
911b2898b3 sched: Optimize task_sched_runtime() 
Large multi-threaded apps like to hit this using do_sys_times() and
then queue up on the rq->lock.

Avoid when possible.

Larry reported ~20% performance increase his test case.

Reported-by: Larry Woodman <lwoodman@redhat.com>
Suggested-by: Paul Turner <pjt@google.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/20131111172925.GG26898@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2013-11-13 13:33:54 +01:00
Peter Zijlstra
5eca82a9ac sched/numa: Cure update_numa_stats() vs. hotplug 
Because we're completely unserialized against hotplug its well
possible to try and generate numa stats for an offlined node.

Bail out early (and avoid a /0) in this case. The resulting stats are
all 0 which should result in an undesirable balance target -- not to
mention that actually trying to migrate to an offline CPU will fail.

Reported-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Mel Gorman <mgorman@suse.de>
Link: http://lkml.kernel.org/n/tip-orja0qylcvyhxfsuebcyL5sI@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2013-11-13 13:33:52 +01:00
Rik van Riel
46a73e8a1c sched/numa: Fix NULL pointer dereference in task_numa_migrate() 
The cpusets code can split up the scheduler's domain tree into
smaller domains.  Some of those smaller domains may not cross
NUMA nodes at all, leading to a NULL pointer dereference on the
per-cpu sd_numa pointer.

Tasks cannot be migrated out of their domain, so the patch
also sets p->numa_preferred_nid to whereever they are, to
prevent the migration from being retried over and over again.

Reported-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Mel Gorman <mgorman@suse.de>
Link: http://lkml.kernel.org/n/tip-oosqomw0Jput0Jkvoowhrqtu@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2013-11-13 13:33:51 +01:00
Michael wang
106dd5afde sched: Fix endless sync_sched/rcu() loop inside _cpu_down() 
Commit 6acce3ef8:

	sched: Remove get_online_cpus() usage

tries to do sync_sched/rcu() inside _cpu_down() but triggers:

	INFO: task swapper/0:1 blocked for more than 120 seconds.
	...
	[<ffffffff811263dc>] synchronize_rcu+0x2c/0x30
	[<ffffffff81d1bd82>] _cpu_down+0x2b2/0x340
	...

It was caused by that in the rcu boost case we rely on smpboot thread to
finish the rcu callback, which has already been parked before sync in here
and leads to the endless sync_sched/rcu().

This patch exchanges the sequence of smpboot_park_threads() and
sync_sched/rcu() to fix the bug.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Tested-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Michael Wang <wangyun@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/5282EDC0.6060003@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2013-11-13 13:33:50 +01:00
Dan Carpenter
4fdb793ffe locks: missing unlock on error in generic_add_lease() 
We should unlock here before returning.

Fixes: df4e8d2c1d ('locks: implement delegations')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2013-11-13 07:30:53 -05:00
Dan Carpenter
7f62656be8 aio: checking for NULL instead of IS_ERR 
alloc_anon_inode() returns an ERR_PTR(), it doesn't return NULL.

Fixes: 71ad7490c1 ('rework aio migrate pages to use aio fs')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2013-11-13 07:30:53 -05:00
Linus Torvalds
42a2d923cc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 
Pull networking updates from David Miller:

 1) The addition of nftables.  No longer will we need protocol aware
    firewall filtering modules, it can all live in userspace.

    At the core of nftables is a, for lack of a better term, virtual
    machine that executes byte codes to inspect packet or metadata
    (arriving interface index, etc.) and make verdict decisions.

    Besides support for loading packet contents and comparing them, the
    interpreter supports lookups in various datastructures as
    fundamental operations.  For example sets are supports, and
    therefore one could create a set of whitelist IP address entries
    which have ACCEPT verdicts attached to them, and use the appropriate
    byte codes to do such lookups.

    Since the interpreted code is composed in userspace, userspace can
    do things like optimize things before giving it to the kernel.

    Another major improvement is the capability of atomically updating
    portions of the ruleset.  In the existing netfilter implementation,
    one has to update the entire rule set in order to make a change and
    this is very expensive.

    Userspace tools exist to create nftables rules using existing
    netfilter rule sets, but both kernel implementations will need to
    co-exist for quite some time as we transition from the old to the
    new stuff.

    Kudos to Patrick McHardy, Pablo Neira Ayuso, and others who have
    worked so hard on this.

 2) Daniel Borkmann and Hannes Frederic Sowa made several improvements
    to our pseudo-random number generator, mostly used for things like
    UDP port randomization and netfitler, amongst other things.

    In particular the taus88 generater is updated to taus113, and test
    cases are added.

 3) Support 64-bit rates in HTB and TBF schedulers, from Eric Dumazet
    and Yang Yingliang.

 4) Add support for new 577xx tigon3 chips to tg3 driver, from Nithin
    Sujir.

 5) Fix two fatal flaws in TCP dynamic right sizing, from Eric Dumazet,
    Neal Cardwell, and Yuchung Cheng.

 6) Allow IP_TOS and IP_TTL to be specified in sendmsg() ancillary
    control message data, much like other socket option attributes.
    From Francesco Fusco.

 7) Allow applications to specify a cap on the rate computed
    automatically by the kernel for pacing flows, via a new
    SO_MAX_PACING_RATE socket option.  From Eric Dumazet.

 8) Make the initial autotuned send buffer sizing in TCP more closely
    reflect actual needs, from Eric Dumazet.

 9) Currently early socket demux only happens for TCP sockets, but we
    can do it for connected UDP sockets too.  Implementation from Shawn
    Bohrer.

10) Refactor inet socket demux with the goal of improving hash demux
    performance for listening sockets.  With the main goals being able
    to use RCU lookups on even request sockets, and eliminating the
    listening lock contention.  From Eric Dumazet.

11) The bonding layer has many demuxes in it's fast path, and an RCU
    conversion was started back in 3.11, several changes here extend the
    RCU usage to even more locations.  From Ding Tianhong and Wang
    Yufen, based upon suggestions by Nikolay Aleksandrov and Veaceslav
    Falico.

12) Allow stackability of segmentation offloads to, in particular, allow
    segmentation offloading over tunnels.  From Eric Dumazet.

13) Significantly improve the handling of secret keys we input into the
    various hash functions in the inet hashtables, TCP fast open, as
    well as syncookies.  From Hannes Frederic Sowa.  The key fundamental
    operation is "net_get_random_once()" which uses static keys.

    Hannes even extended this to ipv4/ipv6 fragmentation handling and
    our generic flow dissector.

14) The generic driver layer takes care now to set the driver data to
    NULL on device removal, so it's no longer necessary for drivers to
    explicitly set it to NULL any more.  Many drivers have been cleaned
    up in this way, from Jingoo Han.

15) Add a BPF based packet scheduler classifier, from Daniel Borkmann.

16) Improve CRC32 interfaces and generic SKB checksum iterators so that
    SCTP's checksumming can more cleanly be handled.  Also from Daniel
    Borkmann.

17) Add a new PMTU discovery mode, IP_PMTUDISC_INTERFACE, which forces
    using the interface MTU value.  This helps avoid PMTU attacks,
    particularly on DNS servers.  From Hannes Frederic Sowa.

18) Use generic XPS for transmit queue steering rather than internal
    (re-)implementation in virtio-net.  From Jason Wang.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1622 commits)
  random32: add test cases for taus113 implementation
  random32: upgrade taus88 generator to taus113 from errata paper
  random32: move rnd_state to linux/random.h
  random32: add prandom_reseed_late() and call when nonblocking pool becomes initialized
  random32: add periodic reseeding
  random32: fix off-by-one in seeding requirement
  PHY: Add RTL8201CP phy_driver to realtek
  xtsonic: add missing platform_set_drvdata() in xtsonic_probe()
  macmace: add missing platform_set_drvdata() in mace_probe()
  ethernet/arc/arc_emac: add missing platform_set_drvdata() in arc_emac_probe()
  ipv6: protect for_each_sk_fl_rcu in mem_check with rcu_read_lock_bh
  vlan: Implement vlan_dev_get_egress_qos_mask as an inline.
  ixgbe: add warning when max_vfs is out of range.
  igb: Update link modes display in ethtool
  netfilter: push reasm skb through instead of original frag skbs
  ip6_output: fragment outgoing reassembled skb properly
  MAINTAINERS: mv643xx_eth: take over maintainership from Lennart
  net_sched: tbf: support of 64bit rates
  ixgbe: deleting dfwd stations out of order can cause null ptr deref
  ixgbe: fix build err, num_rx_queues is only available with CONFIG_RPS
  ...
 2013-11-13 17:40:34 +09:00
Linus Torvalds
5cbb3d216e Merge branch 'akpm' (patches from Andrew Morton) 
Merge first patch-bomb from Andrew Morton:
 "Quite a lot of other stuff is banked up awaiting further
  next->mainline merging, but this batch contains:

   - Lots of random misc patches
   - OCFS2
   - Most of MM
   - backlight updates
   - lib/ updates
   - printk updates
   - checkpatch updates
   - epoll tweaking
   - rtc updates
   - hfs
   - hfsplus
   - documentation
   - procfs
   - update gcov to gcc-4.7 format
   - IPC"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (269 commits)
  ipc, msg: fix message length check for negative values
  ipc/util.c: remove unnecessary work pending test
  devpts: plug the memory leak in kill_sb
  ./Makefile: export initial ramdisk compression config option
  init/Kconfig: add option to disable kernel compression
  drivers: w1: make w1_slave::flags long to avoid memory corruption
  drivers/w1/masters/ds1wm.cuse dev_get_platdata()
  drivers/memstick/core/ms_block.c: fix unreachable state in h_msb_read_page()
  drivers/memstick/core/mspro_block.c: fix attributes array allocation
  drivers/pps/clients/pps-gpio.c: remove redundant of_match_ptr
  kernel/panic.c: reduce 1 byte usage for print tainted buffer
  gcov: reuse kbasename helper
  kernel/gcov/fs.c: use pr_warn()
  kernel/module.c: use pr_foo()
  gcov: compile specific gcov implementation based on gcc version
  gcov: add support for gcc 4.7 gcov format
  gcov: move gcov structs definitions to a gcc version specific file
  kernel/taskstats.c: return -ENOMEM when alloc memory fails in add_del_listener()
  kernel/taskstats.c: add nla_nest_cancel() for failure processing between nla_nest_start() and nla_nest_end()
  kernel/sysctl_binary.c: use scnprintf() instead of snprintf()
  ...
 2013-11-13 15:45:43 +09:00
Linus Torvalds
9bc9ccd7db Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 
Pull vfs updates from Al Viro:
 "All kinds of stuff this time around; some more notable parts:

   - RCU'd vfsmounts handling
   - new primitives for coredump handling
   - files_lock is gone
   - Bruce's delegations handling series
   - exportfs fixes

  plus misc stuff all over the place"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (101 commits)
  ecryptfs: ->f_op is never NULL
  locks: break delegations on any attribute modification
  locks: break delegations on link
  locks: break delegations on rename
  locks: helper functions for delegation breaking
  locks: break delegations on unlink
  namei: minor vfs_unlink cleanup
  locks: implement delegations
  locks: introduce new FL_DELEG lock flag
  vfs: take i_mutex on renamed file
  vfs: rename I_MUTEX_QUOTA now that it's not used for quotas
  vfs: don't use PARENT/CHILD lock classes for non-directories
  vfs: pull ext4's double-i_mutex-locking into common code
  exportfs: fix quadratic behavior in filehandle lookup
  exportfs: better variable name
  exportfs: move most of reconnect_path to helper function
  exportfs: eliminate unused "noprogress" counter
  exportfs: stop retrying once we race with rename/remove
  exportfs: clear DISCONNECTED on all parents sooner
  exportfs: more detailed comment for path_reconnect
  ...
 2013-11-13 15:34:18 +09:00
Linus Torvalds
f023029427 dlm for 3.13 
This set includes a single fix to resolve to a race that could cause
 lockspace shutdown to incorrectly return -EBUSY.
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Merge tag 'dlm-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm

Pull dlm fix from David Teigland:
 "This set includes a single fix to resolve to a race that could cause
  lockspace shutdown to incorrectly return -EBUSY"

* tag 'dlm-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm:
  dlm: Avoid that dlm_release_lockspace() incorrectly returns -EBUSY
 2013-11-13 15:31:13 +09:00