Johannes Weiner 00c54c0bac mm: page_cgroup: check page_cgroup arrays in lookup_page_cgroup() only when necessary ...

lookup_page_cgroup() is usually used only against pages that are used in
userspace.

The exception is the CONFIG_DEBUG_VM-only memcg check from the page
allocator: it can run on pages without page_cgroup descriptors allocated
when the pages are fed into the page allocator for the first time during
boot or memory hotplug.

Include the array check only when CONFIG_DEBUG_VM is set and save the
unnecessary check in production kernels.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: Balbir Singh <bsingharora@gmail.com>
Cc: David Rientjes <rientjes@google.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>

2012-01-12 20:13:06 -08:00

..

backing-dev.c

freezer: implement and use kthread_freezable_should_stop()

2011-11-21 12:32:23 -08:00

bootmem.c

mm: bootmem: try harder to free pages in bulk

2012-01-10 16:30:45 -08:00

bounce.c

Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux

2011-11-06 19:44:47 -08:00

cleancache.c

mm: cleancache core ops functions and config

2011-05-26 10:01:36 -06:00

compaction.c

mm: compaction: push isolate search base of compact control one pfn ahead

2012-01-10 16:30:44 -08:00

debug-pagealloc.c

mm, x86: Remove debug_pagealloc_enabled

2011-12-06 09:24:07 +01:00

dmapool.c

mm: fix implicit stat.h usage in dmapool.c

2011-10-31 09:20:12 -04:00

fadvise.c

fadvise: only initiate writeback for specified range with FADV_DONTNEED

2012-01-10 16:30:43 -08:00

failslab.c

switch debugfs to umode_t

2012-01-03 22:54:56 -05:00

filemap_xip.c

mm: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

filemap.c

memcg: add mem_cgroup_replace_page_cache() to fix LRU issue

2012-01-12 20:13:04 -08:00

fremap.c

mm: delete various needless include <linux/module.h>

2011-10-31 09:20:11 -04:00

highmem.c

Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux

2011-11-06 19:44:47 -08:00

huge_memory.c

memcg: make mem_cgroup_split_huge_fixup() more efficient

2012-01-12 20:13:05 -08:00

hugetlb.c

mm/hugetlb.c: avoid bogus counter of surplus huge page

2012-01-10 16:30:45 -08:00

hwpoison-inject.c

Fix common misspellings

2011-03-31 11:26:23 -03:00

init-mm.c

atomic: use <linux/atomic.h>

2011-07-26 16:49:47 -07:00

internal.h

mm: thp: tail page refcounting fix

2011-11-02 16:06:57 -07:00

Kconfig

Merge branch 'master' into x86/memblock

2011-11-28 09:46:22 -08:00

Kconfig.debug

mm: more intensive memory corruption debugging

2012-01-10 16:30:42 -08:00

kmemcheck.c

…

kmemleak-test.c

…

kmemleak.c

mm: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

ksm.c

oom: fix race while temporarily setting current's oom_score_adj

2011-10-31 17:30:45 -07:00

maccess.c

mm: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

madvise.c

fs: kill i_alloc_sem

2011-07-20 20:47:46 -04:00

Makefile

Cross Memory Attach

2011-10-31 17:30:44 -07:00

memblock.c

memblock: Reimplement memblock allocation using reverse free area iterator

2011-12-08 10:22:09 -08:00

memcontrol.c

mm: memcg: lookup_page_cgroup (almost) never returns NULL

2012-01-12 20:13:06 -08:00

memory_hotplug.c

mm: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

memory-failure.c

Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux

2011-11-06 19:44:47 -08:00

memory.c

Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux

2011-11-06 19:44:47 -08:00

mempolicy.c

mm/mempolicy.c: mpol_equal(): use bool

2012-01-10 16:30:45 -08:00

mempool.c

mempool: fix first round failure behavior

2012-01-10 16:30:45 -08:00

migrate.c

mm/migrate.c: remove the unused macro lru_to_page

2012-01-10 16:30:46 -08:00

mincore.c

mm: clarify the radix_tree exceptional cases

2011-08-03 14:25:24 -10:00

mlock.c

Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux

2011-11-06 19:44:47 -08:00

mm_init.c

mm: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

mmap.c

mm: simplify find_vma_prev()

2012-01-10 16:30:44 -08:00

mmu_context.c

mm: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

mmu_notifier.c

mm: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

mmzone.c

mm: delete various needless include <linux/module.h>

2011-10-31 09:20:11 -04:00

mprotect.c

…

mremap.c

mremap: enforce rmap src/dst vma ordering in case of vma_merge() succeeding in copy_vma()

2012-01-10 16:30:44 -08:00

msync.c

…

nobootmem.c

Merge branch 'master' into x86/memblock

2011-11-28 09:46:22 -08:00

nommu.c

xen: map foreign pages for shared rings by updating the PTEs directly

2011-11-16 12:13:08 -05:00

oom_kill.c

mm: unify remaining mem_cont, mem, etc. variable names to memcg

2012-01-12 20:13:06 -08:00

page_alloc.c

mm: collect LRU list heads into struct lruvec

2012-01-12 20:13:05 -08:00

page_cgroup.c

mm: page_cgroup: check page_cgroup arrays in lookup_page_cgroup() only when necessary

2012-01-12 20:13:06 -08:00

page_io.c

…

page_isolation.c

…

page-writeback.c

Merge branch 'writeback-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux

2012-01-10 16:59:59 -08:00

pagewalk.c

pagewalk: fix code comment for THP

2011-07-25 20:57:09 -07:00

percpu-km.c

…

percpu-vm.c

percpu: fix chunk range calculation

2011-11-22 08:09:46 -08:00

percpu.c

percpu: fix per_cpu_ptr_to_phys() handling of non-page-aligned addresses

2011-12-15 11:41:40 -08:00

pgtable-generic.c

…

prio_tree.c

sanitize <linux/prefetch.h> usage

2011-05-20 12:50:29 -07:00

process_vm_access.c

Cross Memory Attach

2011-10-31 17:30:44 -07:00

quicklist.c

mm: delete various needless include <linux/module.h>

2011-10-31 09:20:11 -04:00

readahead.c

mm: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

rmap.c

mm: unify remaining mem_cont, mem, etc. variable names to memcg

2012-01-12 20:13:06 -08:00

shmem.c

vfs: switch ->show_options() to struct dentry *

2012-01-06 23:19:54 -05:00

slab.c

Merge branch 'slab/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux

2012-01-11 18:52:23 -08:00

slob.c

mm: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

slub.c

mm,x86,um: move CMPXCHG_DOUBLE config option

2012-01-12 20:13:03 -08:00

sparse-vmemmap.c

mm: delete various needless include <linux/module.h>

2011-10-31 09:20:11 -04:00

sparse.c

mm: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

swap_state.c

fs: move code out of buffer.c

2012-01-03 22:54:07 -05:00

swap.c

mm: make per-memcg LRU lists exclusive

2012-01-12 20:13:05 -08:00

swapfile.c

mm: unify remaining mem_cont, mem, etc. variable names to memcg

2012-01-12 20:13:06 -08:00

thrash.c

mm/thrash.c: quiet sparse noise

2011-10-31 17:30:50 -07:00

truncate.c

mm: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

util.c

mm: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

vmalloc.c

mm/vmalloc.c: change void* into explict vm_struct*

2012-01-10 16:30:46 -08:00

vmscan.c

mm: unify remaining mem_cont, mem, etc. variable names to memcg

2012-01-12 20:13:06 -08:00

vmstat.c

mm,x86,um: move CMPXCHG_LOCAL config option

2012-01-12 20:13:03 -08:00