linux_dsm_epyc7002/arch
Kirill A. Shutemov c164e038ee mm: fix huge zero page accounting in smaps report
As a small zero page, huge zero page should not be accounted in smaps
report as normal page.

For small pages we rely on vm_normal_page() to filter out zero page, but
vm_normal_page() is not designed to handle pmds.  We only get here due
hackish cast pmd to pte in smaps_pte_range() -- pte and pmd format is not
necessary compatible on each and every architecture.

Let's add separate codepath to handle pmds.  follow_trans_huge_pmd() will
detect huge zero page for us.

We would need pmd_dirty() helper to do this properly.  The patch adds it
to THP-enabled architectures which don't yet have one.

[akpm@linux-foundation.org: use do_div to fix 32-bit build]
Signed-off-by: "Kirill A. Shutemov" <kirill@shutemov.name>
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Tested-by: Fengwei Yin <yfw.kernel@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-12-10 17:41:08 -08:00
..
alpha Merge git://git.infradead.org/users/eparis/audit 2014-10-19 16:25:56 -07:00
arc asm-generic: asm/io.h rewrite 2014-12-09 17:25:00 -08:00
arm Merge branch 'irq-irqdomain-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-12-10 09:01:01 -08:00
arm64 mm: fix huge zero page accounting in smaps report 2014-12-10 17:41:08 -08:00
avr32 avr32: remove mach/atmel-mci.h 2014-11-10 12:40:38 +01:00
blackfin Merge branch 'for-3.18-consistent-ops' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu 2014-10-15 07:48:18 +02:00
c6x
cris cris: io: implement dummy relaxed accessor macros for writes 2014-10-20 18:49:17 +01:00
frv frv: io: implement dummy relaxed accessor macros for writes 2014-10-20 18:49:17 +01:00
hexagon Merge branch 'locking-arch-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-10-13 15:48:00 +02:00
ia64 Merge branch 'x86-mpx-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-12-10 09:34:43 -08:00
m32r m32r: io: implement dummy relaxed accessor macros for writes 2014-10-20 18:49:17 +01:00
m68k asm-generic: asm/io.h rewrite 2014-12-09 17:25:00 -08:00
metag Merge branch 'for-3.18-consistent-ops' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu 2014-10-15 07:48:18 +02:00
microblaze asm-generic: asm/io.h rewrite 2014-12-09 17:25:00 -08:00
mips Merge branch 'x86-mpx-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-12-10 09:34:43 -08:00
mn10300 mn10300: io: implement dummy relaxed accessor macros for writes 2014-10-20 18:49:18 +01:00
nios2 nios2: Make NIOS2_CMDLINE_IGNORE_DTB depend on CMDLINE_BOOL 2014-12-08 12:56:14 +08:00
openrisc Merge git://git.infradead.org/users/eparis/audit 2014-10-19 16:25:56 -07:00
parisc asm-generic: asm/io.h rewrite 2014-12-09 17:25:00 -08:00
powerpc mm: fix huge zero page accounting in smaps report 2014-12-10 17:41:08 -08:00
s390 Merge branch 'x86-mpx-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-12-10 09:34:43 -08:00
score score: use Kbuild logic to include <asm-generic/sections.h> 2014-10-09 22:25:46 -04:00
sh sh: off by one BUG_ON() in setup_bootmem_node() 2014-12-10 17:41:02 -08:00
sparc mm: fix huge zero page accounting in smaps report 2014-12-10 17:41:08 -08:00
tile Merge branch 'irq-irqdomain-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-12-10 09:01:01 -08:00
um mm: Make arch_unmap()/bprm_mm_init() available to all architectures 2014-11-19 11:54:13 +01:00
unicore32 mm: Make arch_unmap()/bprm_mm_init() available to all architectures 2014-11-19 11:54:13 +01:00
x86 mm: fix huge zero page accounting in smaps report 2014-12-10 17:41:08 -08:00
xtensa asm-generic: asm/io.h rewrite 2014-12-09 17:25:00 -08:00
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