The perf_evlist__prepare_workload() method works by forking and then
waiting on a fd that must be written to to allow the workload to be
exec()ed.
But if the tool calling it fails to, say, set up the events with which
it wants to sample the workload for, it will not call
perf_evlist__start_workload(), but even in this case the workload ended
up running:
[acme@zoo linux]$ trace /bin/echo workload ends up running, it should not...
Couldn't mmap the events: Operation not permitted
workload ends up running, it should not...
[acme@zoo linux]$
So check if at least one byte was written before letting exec() be
called.
Now the expected behaviour:
[acme@zoo linux]$ trace /bin/echo workload ends up running, it should not...
Couldn't mmap the events: Operation not permitted
[acme@zoo linux]$
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-oh1ixo8m74rf295a05gfjw8b@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
I'm seeing the following build error on arm64:
In file included from util/event.c:3:0:
util/event.h:95:17: error: 'PERF_REGS_MAX' undeclared here (not in a function)
u64 cache_regs[PERF_REGS_MAX];
^
This patch adds a PERF_REGS_MAX definition for arm64.
Signed-off-by: Mark Salter <msalter@redhat.com>
Acked-by: Jean Pihet <jean.pihet@linaro.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1406325766-8085-1-git-send-email-msalter@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This reverts commit deaff8b659.
This commit makes CLOEXEC feature undetected for normal users,
because per-cpu events are priviledged.
Reported-by: Peter Zijlstra <peterz@infradead.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/20140728065844.GK6758@twins.programming.kicks-ass.net
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Developer stuff:
o More prep work to support Intel PT: (Adrian Hunter)
- Polishing 'script' BTS output
- 'inject' can specify --kallsym
- VDSO is per machine, not a global var
- Expose data addr lookup functions previously private to 'script'
- Large mmap fixes in events processing
o Fix build on gcc 4.4.7 (Arnaldo Carvalho de Melo)
o Event ordering fixes (Jiri Olsa)
o Include standard stringify macros in power pc code (Sukadev Bhattiprolu)
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=W4Hp
-----END PGP SIGNATURE-----
Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core
Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:
Infrastructure changes:
o More prep work to support Intel PT: (Adrian Hunter)
- Polishing 'script' BTS output
- 'inject' can specify --kallsym
- VDSO is per machine, not a global var
- Expose data addr lookup functions previously private to 'script'
- Large mmap fixes in events processing
o Fix build on gcc 4.4.7 (Arnaldo Carvalho de Melo)
o Event ordering fixes (Jiri Olsa)
o Include standard stringify macros in power pc code (Sukadev Bhattiprolu)
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
There's no need to check cloned event's permission once the
parent was already checked.
Also the code is checking 'current' process permissions, which
is not owner process for cloned events, thus could end up with
wrong permission check result.
Reported-by: Alexander Yarygin <yarygin@linux.vnet.ibm.com>
Tested-by: Alexander Yarygin <yarygin@linux.vnet.ibm.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1405079782-8139-1-git-send-email-jolsa@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
iQEcBAABAgAGBQJT1VYNAAoJEHm+PkMAQRiGQJwIAKSYp1Uqz5O/e5r0V1TlZKT4
1B4Njopl57PwSrJQWcGEuH2yHyM896vfPO4L6BJIOfyWzh8kwpQqclDt6uhXoF/v
OsO1zb/7/j+n/pDZsePqP9AyIgErsHEBgUbhecDqzjN++ITPcZjQ6TIMPglZaumN
jFAdAZuAaEwqAk8jqN2wlm689Fh9MuUEarHXbXLCqu5RgLrWhFGhp/cTWY62aqnZ
XfEeQ9KtpRZmlR/IYjerbb1eRH7ZdJsZ88WngLX9dj/JdNxHWBkWQBXGAusXk5Fk
y6LsIV3TjyBdrRKJ1Ifyg/2EIXHNBs8HxTFGXpjtp2HPuMLDxZOWOWikb9URtNg=
=Fjf4
-----END PGP SIGNATURE-----
Merge tag 'v3.16-rc7' into perf/core, to merge in the latest fixes before applying new changes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Pull perf fixes from Thomas Gleixner:
"A bunch of fixes for perf and kprobes:
- revert a commit that caused a perf group regression
- silence dmesg spam
- fix kprobe probing errors on ia64 and ppc64
- filter kprobe faults from userspace
- lockdep fix for perf exit path
- prevent perf #GP in KVM guest
- correct perf event and filters"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
kprobes: Fix "Failed to find blacklist" probing errors on ia64 and ppc64
kprobes/x86: Don't try to resolve kprobe faults from userspace
perf/x86/intel: Avoid spamming kernel log for BTS buffer failure
perf/x86/intel: Protect LBR and extra_regs against KVM lying
perf: Fix lockdep warning on process exit
perf/x86/intel/uncore: Fix SNB-EP/IVT Cbox filter mappings
perf/x86/intel: Use proper dTLB-load-misses event on IvyBridge
perf: Revert ("perf: Always destroy groups on exit")
Pull x86 fixes from Peter Anvin:
"A couple of crash fixes, plus a fix that on 32 bits would cause a
missing -ENOSYS for nonexistent system calls"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86, cpu: Fix cache topology for early P4-SMT
x86_32, entry: Store badsys error code in %eax
x86, MCE: Robustify mcheck_init_device
Pull vfs fixes from Christoph Hellwig:
"A vfsmount leak fix, and a compile warning fix"
* 'vfs-for-3.16' of git://git.infradead.org/users/hch/vfs:
fs: umount on symlink leaks mnt count
direct-io: fix uninitialized warning in do_direct_IO()
with some isochronous workloads (regression since v3.16-rc1).
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2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=xNu7
-----END PGP SIGNATURE-----
Merge tag 'firewire-fix-vt6315' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394
Pull firewire regression fix from Stefan Richter:
"IEEE 1394 (FireWire) subsystem fix: MSI don't work on VIA PCIe
controllers with some isochronous workloads (regression since
v3.16-rc1)"
* tag 'firewire-fix-vt6315' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394:
firewire: ohci: disable MSI for VIA VT6315 again
Michel Dänzer and a couple of other people reported inexplicable random
oopses in the scheduler, and the cause turns out to be gcc mis-compiling
the load_balance() function when debugging is enabled. The gcc bug
apparently goes back to gcc-4.5, but slight optimization changes means
that it now showed up as a problem in 4.9.0 and 4.9.1.
The instruction scheduling problem causes gcc to schedule a spill
operation to before the stack frame has been created, which in turn can
corrupt the spilled value if an interrupt comes in. There may be other
effects of this bug too, but that's the code generation problem seen in
Michel's case.
This is fixed in current gcc HEAD, but the workaround as suggested by
Markus Trippelsdorf is pretty simple: use -fno-var-tracking-assignments
when compiling the kernel, which disables the gcc code that causes the
problem. This can result in slightly worse debug information for
variable accesses, but that is infinitely preferable to actual code
generation problems.
Doing this unconditionally (not just for CONFIG_DEBUG_INFO) also allows
non-debug builds to verify that the debug build would be identical: we
can do
export GCC_COMPARE_DEBUG=1
to make gcc internally verify that the result of the build is
independent of the "-g" flag (it will make the compiler build everything
twice, toggling the debug flag, and compare the results).
Without the "-fno-var-tracking-assignments" option, the build would fail
(even with 4.8.3 that didn't show the actual stack frame bug) with a gcc
compare failure.
See also gcc bugzilla:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61801
Reported-by: Michel Dänzer <michel@daenzer.net>
Suggested-by: Markus Trippelsdorf <markus@trippelsdorf.de>
Cc: Jakub Jelinek <jakub@redhat.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Shortly before 3.16-rc1, Dave Jones reported:
WARNING: CPU: 3 PID: 19721 at fs/xfs/xfs_aops.c:971
xfs_vm_writepage+0x5ce/0x630 [xfs]()
CPU: 3 PID: 19721 Comm: trinity-c61 Not tainted 3.15.0+ #3
Call Trace:
xfs_vm_writepage+0x5ce/0x630 [xfs]
shrink_page_list+0x8f9/0xb90
shrink_inactive_list+0x253/0x510
shrink_lruvec+0x563/0x6c0
shrink_zone+0x3b/0x100
shrink_zones+0x1f1/0x3c0
try_to_free_pages+0x164/0x380
__alloc_pages_nodemask+0x822/0xc90
alloc_pages_vma+0xaf/0x1c0
handle_mm_fault+0xa31/0xc50
etc.
970 if (WARN_ON_ONCE((current->flags & (PF_MEMALLOC|PF_KSWAPD)) ==
971 PF_MEMALLOC))
I did not respond at the time, because a glance at the PageDirty block
in shrink_page_list() quickly shows that this is impossible: we don't do
writeback on file pages (other than tmpfs) from direct reclaim nowadays.
Dave was hallucinating, but it would have been disrespectful to say so.
However, my own /var/log/messages now shows similar complaints
WARNING: CPU: 1 PID: 28814 at fs/ext4/inode.c:1881 ext4_writepage+0xa7/0x38b()
WARNING: CPU: 0 PID: 27347 at fs/ext4/inode.c:1764 ext4_writepage+0xa7/0x38b()
from stressing some mmotm trees during July.
Could a dirty xfs or ext4 file page somehow get marked PageSwapBacked,
so fail shrink_page_list()'s page_is_file_cache() test, and so proceed
to mapping->a_ops->writepage()?
Yes, 3.16-rc1's commit 68711a7463 ("mm, migration: add destination
page freeing callback") has provided such a way to compaction: if
migrating a SwapBacked page fails, its newpage may be put back on the
list for later use with PageSwapBacked still set, and nothing will clear
it.
Whether that can do anything worse than issue WARN_ON_ONCEs, and get
some statistics wrong, is unclear: easier to fix than to think through
the consequences.
Fixing it here, before the put_new_page(), addresses the bug directly,
but is probably the worst place to fix it. Page migration is doing too
many parts of the job on too many levels: fixing it in
move_to_new_page() to complement its SetPageSwapBacked would be
preferable, except why is it (and newpage->mapping and newpage->index)
done there, rather than down in migrate_page_move_mapping(), once we are
sure of success? Not a cleanup to get into right now, especially not
with memcg cleanups coming in 3.17.
Reported-by: Dave Jones <davej@redhat.com>
Signed-off-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull drm fixes from Dave Airlie:
"This is radeon and intel fixes, and is a small bit larger than I'm
guessing you'd like it to be.
- i915: fixes 32-bit highmem i915 blank screen, semaphore hang and
runtime pm fix
- radeon: gpuvm stability fix for hangs since 3.15, and hang/reboot
regression on TN/RL devices,
The only slightly controversial one is the change to use GB for the
vm_size, which I'm letting through as its a new interface we defined
in this merge window, and I'd prefer to have the released kernel have
the final interface rather than changing it later"
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
drm/radeon: fix cut and paste issue for hawaii.
drm/radeon: fix irq ring buffer overflow handling
drm/i915: Simplify i915_gem_release_all_mmaps()
drm/radeon: fix error handling in radeon_vm_bo_set_addr
drm/i915: fix freeze with blank screen booting highmem
drm/i915: Reorder the semaphore deadlock check, again
drm/radeon/TN: only enable bapm on MSI systems
drm/radeon: fix VM IB handling
drm/radeon: fix handling of radeon_vm_bo_rmv v3
drm/radeon: let's use GB for vm_size (v2)
Here contains only the fixes for the new FireWire bebob driver.
All fairly trivial and local fixes, so safe to apply.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2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=2EEt
-----END PGP SIGNATURE-----
Merge tag 'sound-3.16-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"Here contains only the fixes for the new FireWire bebob driver. All
fairly trivial and local fixes, so safe to apply"
* tag 'sound-3.16-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: bebob: Correction for return value of special_clk_ctl_put() in error
ALSA: bebob: Correction for return value of .put callback
ALSA: bebob: Use different labels for digital input/output
ALSA: bebob: Fix a missing to unlock mutex in error handling case
Do not split the PARPORT-related symbols with the new kconfig
symbol ARCH_MIGHT_HAVE_PC_PARPORT. The split was causing incorrect
display of these symbols -- they were not being displayed together
as they should be.
Fixes: d90c3eb315 "Kconfig cleanup (PARPORT_PC dependencies)"
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Mark Salter <msalter@redhat.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: stable@vger.kernel.org # for 3.13, 3.14, 3.15
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.11 (GNU/Linux)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=tFJe
-----END PGP SIGNATURE-----
Merge tag 'blackfin-3.16-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/realmz6/blackfin-linux
Pull blackfin fixes from Steven Miao:
"smc nor flash PM fix, pinctrl group fix, update defconfig, and build
fixes"
* tag 'blackfin-3.16-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/realmz6/blackfin-linux:
blackfin: vmlinux.lds.S: reserve 32 bytes space at the end of data section for XIP kernel
defconfig: BF609: update spi config name
irq: blackfin sec: drop duplicated sec priority set
blackfin: bind different groups of one pinmux function to different state name
blackfin: fix some bf5xx boards build for missing <linux/gpio.h>
pm: bf609: cleanup smc nor flash
drop smc pin state change code, pin state will be saved in pinctrl-adi2 driver
cleanup nor flash init/exit for pm suspend/resume
Signed-off-by: Steven Miao <realmz6@gmail.com>
Pull parisc fixes from Helge Deller:
"We have two trivial patches in here. One removes the SA_RESTORER
#define since on parisc we don't have the sa_restorer field in struct
sigaction, the other patch removes an unnecessary memset().
The SA_RESTORER removal patch is scheduled for stable trees, since
without it some userspace apps don't build"
* 'parisc-3.16-6' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: Eliminate memset after alloc_bootmem_pages
parisc: Remove SA_RESTORER define
Pull fuse fixes from Miklos Szeredi:
"These two pathes fix issues with the kernel-userspace protocol changes
in v3.15"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
fuse: add FUSE_NO_OPEN_SUPPORT flag to INIT
fuse: s_time_gran fix
Currently we store PERF_RECORD_FINISHED_ROUND event each time
we go throught mmap buffers no matter if it contains any data,
which is useless.
Forcing the PERF_RECORD_FINISHED_ROUND event to be stored any
time we finished the round AND wrote at least one event.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: David Ahern <dsahern@gmail.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1406300177-31805-19-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
The PERF_RECORD_FINISHED_ROUND synthetic record governs queue flushing
in reporting, so it needs to be stored for any kind of event.
The lack of such periodic flushing made the tools use more memory than
needed, as the reordering was being done only after processing all
events. This was the case when no tracepoints were in the mix.
Forcing the PERF_RECORD_FINISHED_ROUND event to be stored for all event
types.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: David Ahern <dsahern@gmail.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1406300177-31805-18-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Let perf inject take --kallsyms parameter the same as perf script and
perf report do.
That is needed for decoding Instruction Trace data using a copy of
/proc/kcore for the kernel object because the kallsyms path is used to
locate that copy.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1406035081-14301-30-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Move some functions and functionality related to the use of
'addr' out of builtin-script so they can be reused.
The moved functions are: is_bts_event() and sample_addr_correlates_sym()
and a new function perf_event__preprocess_sample_addr() is created from
bits of print_sample_addr().
perf_event__preprocess_sample_addr() is the equivalent of
perf_event__preprocess_sample() but for 'addr' instead of 'ip'.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1406035081-14301-31-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This fix was necessary after
9c15a24b03 ("x86/mce: Improve mcheck_init_device() error handling")
went in. What this patch did was, among others, check the return value
of misc_register and exit early if it encountered an error. Original
code sloppily didn't do that.
However,
cef12ee52b ("xen/mce: Add mcelog support for Xen platform")
made it so that xen's init routine xen_late_init_mcelog runs first. This
was needed for the xen mcelog device which is supposed to be independent
from the baremetal one.
Initially it was reported that misc_register() fails often on xen and
that's why it needed fixing. However, it is *supposed* to fail by
design, when running in dom0 so that the xen mcelog device file gets
registered first.
And *then* you need the notifier *not* unregistered on the error path so
that the timer does get deleted properly in the CPU hotplug notifier.
Btw, this fix is needed also on baremetal in the unlikely event that
misc_register(&mce_chrdev_device) fails there too.
I was unsure whether to rush it in now and decided to delay it to 3.17.
However, xen people wanted it promoted as it breaks xen when doing cpu
hotplug there. So, after a bit of simmering in tip/master for initial
smoke testing, let's move it to 3.16. It fixes a semi-regression which
got introduced in 3.16 so no need for stable tagging.
tip/x86/ras contains that exact same commit but we can't remove it
there as it is not the last one. It won't cause any merge issues, as I
confirmed locally but I should state here the special situation of this
one fix explicitly anyway.
Thanks.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=z/P/
-----END PGP SIGNATURE-----
x86: Merge tag 'ras_urgent' into x86/urgent
Promote one fix for 3.16
This fix was necessary after
9c15a24b03 ("x86/mce: Improve mcheck_init_device() error handling")
went in. What this patch did was, among others, check the return value
of misc_register and exit early if it encountered an error. Original
code sloppily didn't do that.
However,
cef12ee52b ("xen/mce: Add mcelog support for Xen platform")
made it so that xen's init routine xen_late_init_mcelog runs first. This
was needed for the xen mcelog device which is supposed to be independent
from the baremetal one.
Initially it was reported that misc_register() fails often on xen and
that's why it needed fixing. However, it is *supposed* to fail by
design, when running in dom0 so that the xen mcelog device file gets
registered first.
And *then* you need the notifier *not* unregistered on the error path so
that the timer does get deleted properly in the CPU hotplug notifier.
Btw, this fix is needed also on baremetal in the unlikely event that
misc_register(&mce_chrdev_device) fails there too.
I was unsure whether to rush it in now and decided to delay it to 3.17.
However, xen people wanted it promoted as it breaks xen when doing cpu
hotplug there. So, after a bit of simmering in tip/master for initial
smoke testing, let's move it to 3.16. It fixes a semi-regression which
got introduced in 3.16 so no need for stable tagging.
tip/x86/ras contains that exact same commit but we can't remove it
there as it is not the last one. It won't cause any merge issues, as I
confirmed locally but I should state here the special situation of this
one fix explicitly anyway.
Thanks.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This is a halfway fix for hawaii acceleration. More fixes to come
but hopefully isolated to userspace.
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
two more radeon fixes.
* 'drm-fixes-3.16' of git://people.freedesktop.org/~agd5f/linux:
drm/radeon: fix irq ring buffer overflow handling
drm/radeon: fix error handling in radeon_vm_bo_set_addr
This time in time! Just 32bit-pae fix from Hugh, semaphores fun from Chris
and a fix for runtime pm cherry-picked from next.
Paulo is still working on a fix for runtime pm when X does cursor fun when
the display is off, but that one isn't ready yet.
* tag 'drm-intel-fixes-2014-07-24' of git://anongit.freedesktop.org/drm-intel:
drm/i915: Simplify i915_gem_release_all_mmaps()
drm/i915: fix freeze with blank screen booting highmem
drm/i915: Reorder the semaphore deadlock check, again
alloc_bootmem and related function always return zeroed region of
memory. Thus a memset after calls to these functions is unnecessary.
The following Coccinelle semantic patch was used for making the change:
@@
expression E,E1;
@@
E = \(alloc_bootmem\|alloc_bootmem_low\|alloc_bootmem_pages\|alloc_bootmem_low_pages\)(...)
... when != E
- memset(E,0,E1);
Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Helge Deller <deller@gmx.de>
The sa_restorer field in struct sigaction is obsolete and no longer in
the parisc implementation. However, the core code assumes the field is
present if SA_RESTORER is defined. So, the define needs to be removed.
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Cc: <stable@vger.kernel.org>
Signed-off-by: Helge Deller <deller@gmx.de>
The stringify macros are defined in tools/perf/util/util.h and don't
need to be redfined specfiically for powerpc.
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Michael Ellerman <michaele@au1.ibm.com>
Link: http://lkml.kernel.org/r/20140724074718.GB18829@us.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Temperature limit clamps are applied after converting the temperature
from milli-degrees C to degrees C, so either the clamp limit needs
to be specified in degrees C, not milli-degrees C, or clamping must
happen before converting to degrees C. Use the latter method to avoid
overflows.
vrm is an u8, so the written value needs to be limited to [0, 255].
Cc: Axel Lin <axel.lin@ingics.com>
Cc: stable@vger.kernel.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Currently umount on symlink blocks following umount:
/vz is separate mount
# ls /vz/ -al | grep test
drwxr-xr-x. 2 root root 4096 Jul 19 01:14 testdir
lrwxrwxrwx. 1 root root 11 Jul 19 01:16 testlink -> /vz/testdir
# umount -l /vz/testlink
umount: /vz/testlink: not mounted (expected)
# lsof /vz
# umount /vz
umount: /vz: device is busy. (unexpected)
In this case mountpoint_last() gets an extra refcount on path->mnt
Signed-off-by: Vasily Averin <vvs@openvz.org>
Acked-by: Ian Kent <raven@themaw.net>
Acked-by: Jeff Layton <jlayton@primarydata.com>
Cc: stable@vger.kernel.org
Signed-off-by: Christoph Hellwig <hch@lst.de>
The following warnings:
fs/direct-io.c: In function ‘__blockdev_direct_IO’:
fs/direct-io.c:1011:12: warning: ‘to’ may be used uninitialized in this function [-Wmaybe-uninitialized]
fs/direct-io.c:913:16: note: ‘to’ was declared here
fs/direct-io.c:1011:12: warning: ‘from’ may be used uninitialized in this function [-Wmaybe-uninitialized]
fs/direct-io.c:913:10: note: ‘from’ was declared here
are false positive because dio_get_page() either fails, or sets both
'from' and 'to'.
Paul Bolle said ...
Maybe it's better to move initializing "to" and "from" out of
dio_get_page(). That _might_ make it easier for both the the reader and
the compiler to understand what's going on. Something like this:
Christoph Hellwig said ...
The fix of moving the code definitively looks nicer, while I think
uninitialized_var is horrible wart that won't get anywhere near my code.
Boaz Harrosh: I agree with Christoph and Paul
Signed-off-by: Boaz Harrosh <boaz@plexistor.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Pull nfsd bugfix from Bruce Fields:
"Another regression from the xdr encoding rewrite"
* 'for-3.16' of git://linux-nfs.org/~bfields/linux:
NFSD: Fix crash encoding lock reply on 32-bit
- resolve FIXMEs in double exception handler for window overflow. This
fix makes native building of linux on xtensa host possible;
- fix sysmem region removal issue introduced in 3.15.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)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=khlu
-----END PGP SIGNATURE-----
Merge tag 'xtensa-next-20140721' of git://github.com/czankel/xtensa-linux
Pull Xtensa fixes from Chris Zankel:
- resolve FIXMEs in double exception handler for window overflow. This
fix makes native building of linux on xtensa host possible;
- fix sysmem region removal issue introduced in 3.15.
* tag 'xtensa-next-20140721' of git://github.com/czankel/xtensa-linux:
xtensa: fix sysmem reservation at the end of existing block
xtensa: add fixup for double exception raised in window overflow
- An IRQ handling fix for the STi driver, also for stable
- Another IRQ fix for the RCAR GPIO driver
- A MAINTAINERS entry
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=pzyJ
-----END PGP SIGNATURE-----
Merge tag 'pinctrl-v3.16-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
Pull pin control fixes from Linus Walleij:
"Here are three pin control fixes for the v3.16 series. Sorry that
some of these arrive late, the summer heat in Sweden makes me slow.
- an IRQ handling fix for the STi driver, also for stable
- another IRQ fix for the RCAR GPIO driver
- a MAINTAINERS entry"
* tag 'pinctrl-v3.16-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
gpio: rcar: Add support for DT IRQ flags
MAINTAINERS: Add entry for the Renesas pin controller driver
pinctrl: st: Fix irqmux handler
Pull libata regression fix from Tejun Heo:
"The last libata/for-3.16-fixes pull contained a regression introduced
by 1871ee134b ("libata: support the ata host which implements a
queue depth less than 32") which in turn was a fix for a regression
introduced earlier while changing queue tag order to accomodate hard
drives which perform poorly if tags are not allocated in circular
order (ugh...).
The regression happens only for SAS controllers making use of libata
to serve ATA devices. They don't fill an ata_host field which is used
by the new tag allocation function leading to NULL dereference.
This patch adds a new intermediate field ata_host->n_tags which is
initialized for both SAS and !SAS cases to fix the issue"
* 'for-3.16-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
libata: introduce ata_host->n_tags to avoid oops on SAS controllers
Pull powerpc fixes from Ben Herrenschmidt:
"Here is a handful of powerpc fixes for 3.16. They are all pretty
simple and self contained and should still make this release"
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
powerpc: use _GLOBAL_TOC for memmove
powerpc/pseries: dynamically added OF nodes need to call of_node_init
powerpc: subpage_protect: Increase the array size to take care of 64TB
powerpc: Fix bugs in emulate_step()
powerpc: Disable doorbells on Power8 DD1.x
