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android_kernel_google_msm/mm
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Wanpeng Li bea7cce431 mm/hugetlb: fix total hugetlbfs pages count when using memory overcommit accouting 
commit d00285884c upstream.

hugetlb_total_pages is used for overcommit calculations but the current
implementation considers only the default hugetlb page size (which is
either the first defined hugepage size or the one specified by
default_hugepagesz kernel boot parameter).

If the system is configured for more than one hugepage size, which is
possible since commit a137e1cc6d ("hugetlbfs: per mount huge page
sizes") then the overcommit estimation done by __vm_enough_memory()
(resp.  shown by meminfo_proc_show) is not precise - there is an
impression of more available/allowed memory.  This can lead to an
unexpected ENOMEM/EFAULT resp.  SIGSEGV when memory is accounted.

Testcase:
  boot: hugepagesz=1G hugepages=1
  the default overcommit ratio is 50
  before patch:

    egrep 'CommitLimit' /proc/meminfo
    CommitLimit:     55434168 kB

  after patch:

    egrep 'CommitLimit' /proc/meminfo
    CommitLimit:     54909880 kB

[akpm@linux-foundation.org: coding-style tweak]
Signed-off-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: Hillf Danton <dhillf@gmail.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-28 12:12:12 -07:00
..
backing-dev.c backing-dev: fix wakeup timer races with bdi_unregister() 2012-02-01 16:52:49 +08:00
bootmem.c mm: sparse: fix usemap allocation above node descriptor section 2012-10-02 10:30:36 -07:00
bounce.c mm: remove the second argument of k[un]map_atomic() 2012-03-20 21:48:27 +08:00
cleancache.c mm: cleancache: Use __read_mostly as appropiate. 2012-01-23 16:08:09 -05:00
compaction.c mm: compaction: fix echo 1 > compact_memory return error issue 2013-01-17 08:50:43 -08:00
debug-pagealloc.c mm, x86: Remove debug_pagealloc_enabled 2011-12-06 09:24:07 +01:00
dmapool.c mm: dmapool: use provided gfp flags for all dma_alloc_coherent() calls 2012-12-17 10:37:44 -08:00
fadvise.c mm/fadvise.c: drain all pagevecs if POSIX_FADV_DONTNEED fails to discard all pages 2013-02-28 06:59:01 -08:00
failslab.c switch debugfs to umode_t 2012-01-03 22:54:56 -05:00
filemap.c radix-tree: use iterators in find_get_pages* functions 2012-03-28 17:14:37 -07:00
filemap_xip.c mm/filemap_xip.c: fix race condition in xip_file_fault() 2012-02-03 16:16:41 -08:00
fremap.c
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 thp, memcg: split hugepage for memcg oom on cow 2013-01-17 08:50:53 -08:00
hugetlb.c mm/hugetlb: fix total hugetlbfs pages count when using memory overcommit accouting 2013-03-28 12:12:12 -07:00
hwpoison-inject.c HWPOISON: Clean up memory_failure() vs. __memory_failure() 2012-01-03 12:06:32 -08:00
init-mm.c
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 kmemleak: Disable early logging when kmemleak is off by default 2012-01-20 16:57:05 +00:00
ksm.c ksm: cleanup: introduce find_mergeable_vma() 2012-03-21 17:54:59 -07:00
maccess.c
madvise.c mm: Hold a file reference in madvise_remove 2012-07-16 09:04:43 -07:00
Makefile
memblock.c x86, mm: Trim memory in memblock to be page aligned 2012-10-31 10:02:56 -07:00
memcontrol.c memcg: oom: fix totalpages calculation for memory.swappiness==0 2012-11-26 11:37:45 -08:00
memory-failure.c mm: soft offline: split thp at the beginning of soft_offline_page() 2012-12-10 10:59:39 -08:00
memory.c thp, memcg: split hugepage for memcg oom on cow 2013-01-17 08:50:53 -08:00
memory_hotplug.c memory hotplug: fix section info double registration bug 2012-10-02 10:30:06 -07:00
mempolicy.c tmpfs mempolicy: fix /proc/mounts corrupting memory 2013-01-11 09:06:49 -08:00
mempool.c mempool: fix first round failure behavior 2012-01-10 16:30:45 -08:00
migrate.c mm: fix NULL ptr dereference in move_pages 2012-04-25 21:26:34 -07:00
mincore.c mm: thp: fix pmd_bad() triggering in code paths holding mmap_sem read mode 2012-03-21 17:54:54 -07:00
mlock.c vm: avoid using find_vma_prev() unnecessarily 2012-03-06 18:23:36 -08:00
mm_init.c
mmap.c kill mm argument of vm_munmap() 2012-04-21 01:58:20 -04:00
mmu_context.c mm, counters: remove task argument to sync_mm_rss() and __sync_task_rss_stat() 2012-03-21 17:54:59 -07:00
mmu_notifier.c mmu_notifier_unregister NULL Pointer deref and multiple ->release() callouts 2013-02-28 06:59:00 -08:00
mmzone.c
mprotect.c Merge branch 'akpm' (Andrew's patch-bomb) 2012-03-22 09:04:48 -07:00
mremap.c mm: collapse security_vm_enough_memory() variants into a single function 2012-02-14 10:45:39 +11:00
msync.c
nobootmem.c memblock: free allocated memblock_reserved_regions later 2012-07-16 09:04:45 -07:00
nommu.c kill mm argument of vm_munmap() 2012-04-21 01:58:20 -04:00
oom_kill.c signal: oom_kill_task: use SEND_SIG_FORCED instead of force_sig() 2012-03-23 16:58:41 -07:00
page-writeback.c mm: fix calculation of dirtyable memory 2013-01-11 09:06:48 -08:00
page_alloc.c mm: fix pageblock bitmap allocation 2013-02-28 06:58:58 -08:00
page_cgroup.c page_cgroup: fix horrid swap accounting regression 2012-03-06 08:18:23 -08:00
page_io.c
page_isolation.c
pagewalk.c mm: thp: fix pmd_bad() triggering in code paths holding mmap_sem read mode 2012-03-21 17:54:54 -07:00
percpu-km.c
percpu-vm.c percpu: use bitmap_clear 2012-01-20 09:23:16 -08:00
percpu.c kmemleak: Fix the kmemleak tracking of the percpu areas with !SMP 2012-05-09 10:13:29 -07:00
pgtable-generic.c thp: add HPAGE_PMD_* definitions for !CONFIG_TRANSPARENT_HUGEPAGE 2012-03-21 17:55:02 -07:00
prio_tree.c
process_vm_access.c Fix: compat_rw_copy_check_uvector() misuse in aio, readv, writev, and security keys 2013-03-14 11:29:51 -07:00
quicklist.c
readahead.c
rmap.c mm: fix XFS oops due to dirty pages without buffers on s390 2012-10-31 10:02:56 -07:00
shmem.c tmpfs: fix use-after-free of mempolicy object 2013-02-28 06:59:01 -08:00
slab.c slab: fix the DEADLOCK issue on l3 alien lock 2012-10-13 05:38:37 +09:00
slob.c
slub.c slub: fix a memory leak in get_partial_node() 2012-06-10 00:36:11 +09:00
sparse-vmemmap.c
sparse.c mm/vmemmap: fix wrong use of virt_to_page 2012-12-10 10:59:39 -08:00
swap.c mm: drain percpu lru add/rotate page-vectors on cpu hot-unplug 2012-03-21 17:54:58 -07:00
swap_state.c mm: fix s390 BUG by __set_page_dirty_no_writeback on swap 2012-04-23 18:19:22 -07:00
swapfile.c swap: fix shmem swapping when more than 8 areas 2012-06-22 11:36:55 -07:00
thrash.c
truncate.c mm: fix invalidate_complete_page2() lock ordering 2012-10-13 05:38:51 +09:00
util.c procfs: mark thread stack correctly in proc/<pid>/maps 2012-03-21 17:54:58 -07:00
vmalloc.c mm: fix faulty initialization in vmalloc_init() 2012-06-10 00:36:06 +09:00
vmscan.c mm: bugfix: set current->reclaim_state to NULL while returning from kswapd() 2012-11-26 11:37:19 -08:00
vmstat.c mm: fix up the vmscan stat in vmstat 2012-04-25 21:26:33 -07:00