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Kirill A. Shutemov 112bc2e120 memcg: fix false positive VM_BUG on non-SMP 
Fix this:

  kernel BUG at mm/memcontrol.c:2155!
  invalid opcode: 0000 [#1]
  last sysfs file:

  Pid: 18, comm: sh Not tainted 2.6.37-rc3 #3 /Bochs
  EIP: 0060:[<c10731b2>] EFLAGS: 00000246 CPU: 0
  EIP is at mem_cgroup_move_account+0xe2/0xf0
  EAX: 00000004 EBX: c6f931d4 ECX: c681c300 EDX: c681c000
  ESI: c681c300 EDI: ffffffea EBP: c681c000 ESP: c46f3e30
   DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068
  Process sh (pid: 18, ti=c46f2000 task=c6826e60 task.ti=c46f2000)
  Stack:
   00000155 c681c000 0805f000 c46ee180 c46f3e5c c7058820 c1074d37 00000000
   08060000 c46db9a0 c46ec080 c7058820 0805f000 08060000 c46f3e98 c1074c50
   c106c75e c46f3e98 c46ec080 08060000 0805ffff c46db9a0 c46f3e98 c46e0340
  Call Trace:
   [<c1074d37>] ? mem_cgroup_move_charge_pte_range+0xe7/0x130
   [<c1074c50>] ? mem_cgroup_move_charge_pte_range+0x0/0x130
   [<c106c75e>] ? walk_page_range+0xee/0x1d0
   [<c10725d6>] ? mem_cgroup_move_task+0x66/0x90
   [<c1074c50>] ? mem_cgroup_move_charge_pte_range+0x0/0x130
   [<c1072570>] ? mem_cgroup_move_task+0x0/0x90
   [<c1042616>] ? cgroup_attach_task+0x136/0x200
   [<c1042878>] ? cgroup_tasks_write+0x48/0xc0
   [<c1041e9e>] ? cgroup_file_write+0xde/0x220
   [<c101398d>] ? do_page_fault+0x17d/0x3f0
   [<c108a79d>] ? alloc_fd+0x2d/0xd0
   [<c1041dc0>] ? cgroup_file_write+0x0/0x220
   [<c1077ba2>] ? vfs_write+0x92/0xc0
   [<c1077c81>] ? sys_write+0x41/0x70
   [<c1140e3d>] ? syscall_call+0x7/0xb
  Code: 03 00 74 09 8b 44 24 04 e8 1c f1 ff ff 89 73 04 8d 86 b0 00 00 00 b9 01 00 00 00 89 da 31 ff e8 65 f5 ff ff e9 4d ff ff ff 0f 0b <0f> 0b 0f 0b 0f 0b 90 8d b4 26 00 00 00 00 83 ec 10 8b 0d f4 e3
  EIP: [<c10731b2>] mem_cgroup_move_account+0xe2/0xf0 SS:ESP 0068:c46f3e30
  ---[ end trace 7daa1582159b6532 ]---

lock_page_cgroup and unlock_page_cgroup are implemented using
bit_spinlock.  bit_spinlock doesn't touch the bit if we are on non-SMP
machine, so we can't use the bit to check whether the lock was taken.

Let's introduce is_page_cgroup_locked based on bit_spin_is_locked instead
of PageCgroupLocked to fix it.

[akpm@linux-foundation.org: s/is_page_cgroup_locked/page_is_cgroup_locked/]
Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>
Reviewed-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujtisu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-25 06:50:40 +09:00
..
backing-dev.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
2010-10-26 17:58:44 -07:00
bootmem.c
x86, memblock: Replace e820_/_early string with memblock_
2010-08-27 11:13:47 -07:00
bounce.c
bounce: call flush_dcache_page() after bounce_copy_vec()
2010-09-09 18:57:25 -07:00
compaction.c
mm: compaction: handle active and inactive fairly in too_many_isolated
2010-09-09 18:57:24 -07:00
debug-pagealloc.c
generic debug pagealloc
2009-04-01 08:59:13 -07:00
dmapool.c
mm: add a might_sleep_if() to dma_pool_alloc()
2010-10-26 16:52:08 -07:00
fadvise.c
readahead: introduce FMODE_RANDOM for POSIX_FADV_RANDOM
2010-03-06 11:26:25 -08:00
failslab.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
filemap_xip.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
filemap.c
radix-tree: fix RCU bug
2010-11-12 07:55:32 -08:00
fremap.c
Avoid pgoff overflow in remap_file_pages
2010-09-25 09:34:58 -07:00
highmem.c
mm,x86: fix kmap_atomic_push vs ioremap_32.c
2010-10-27 18:03:05 -07:00
hugetlb.c
mm/hugetlb.c: add missing spin_lock() to hugetlb_cow()
2010-10-26 16:52:11 -07:00
hwpoison-inject.c
HWPOISON, hugetlb: support hwpoison injection for hugepage
2010-08-11 09:23:11 +02:00
init-mm.c
mm: provide init_mm mm_context initializer
2010-08-09 20:44:54 -07:00
internal.h
mm: fix is_mem_section_removable() page_order BUG_ON check
2010-10-26 16:52:11 -07:00
Kconfig
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
2010-10-22 17:31:36 -07:00
Kconfig.debug
trivial: improve help text for mm debug config options
2009-09-21 15:14:57 +02:00
kmemcheck.c
kmemcheck: Fix build errors due to missing slab.h
2010-03-30 22:02:32 +09:00
kmemleak-test.c
percpu: clean up percpu variable definitions
2009-06-24 15:13:48 +09:00
kmemleak.c
kmemleak: Fix typo in the comment
2010-08-08 21:57:23 +01:00
ksm.c
ksm: fix bad user data when swapping
2010-10-04 11:09:53 -07:00
maccess.c
MN10300: Save frame pointer in thread_info struct rather than global var
2010-10-27 17:29:01 +01:00
madvise.c
HWPOISON: Add a madvise() injector for soft page offlining
2009-12-16 12:20:00 +01:00
Makefile
percpu: use percpu allocator on UP too
2010-10-02 10:26:05 +03:00
memblock.c
memblock: Annotate memblock functions with __init_memblock
2010-10-11 16:00:52 -07:00
memcontrol.c
memcg: fix false positive VM_BUG on non-SMP
2010-11-25 06:50:40 +09:00
memory_hotplug.c
mm: do_migrate_range: reduce list_empty() check
2010-10-26 16:52:11 -07:00
memory-failure.c
mm: compaction: fix COMPACTPAGEFAILED counting
2010-10-26 16:52:06 -07:00
memory.c
use clear_page()/copy_page() in favor of memset()/memcpy() on whole pages
2010-10-26 16:52:13 -07:00
mempolicy.c
numa: fix slab_node(MPOL_BIND)
2010-10-28 10:04:30 -07:00
mempool.c
mm: remove broken 'kzalloc' mempool
2009-09-22 07:17:35 -07:00
migrate.c
mm: fix error reporting in move_pages() syscall
2010-10-26 16:52:11 -07:00
mincore.c
mincore: do nested page table walks
2010-05-25 08:06:58 -07:00
mlock.c
mm: Move vma_stack_continue into mm.h
2010-09-09 09:05:06 -07:00
mm_init.c
…
mmap.c
audit mmap
2010-10-30 08:45:43 -04:00
mmu_context.c
exit: fix oops in sync_mm_rss
2010-03-24 16:31:21 -07:00
mmu_notifier.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
mmzone.c
mm: page allocator: calculate a better estimate of NR_FREE_PAGES when memory is low and kswapd is awake
2010-09-09 18:57:25 -07:00
mprotect.c
perf_events: Fix perf_counter_mmap() hook in mprotect()
2010-11-09 10:19:38 -08:00
mremap.c
mm: remove pte_*map_nested()
2010-10-26 16:52:08 -07:00
msync.c
sanitize vfs_fsync calling conventions
2010-05-21 18:31:21 -04:00
nommu.c
nommu: yield CPU while disposing VM
2010-11-25 06:50:38 +09:00
oom_kill.c
oom: kill all threads sharing oom killed task's mm
2010-10-26 16:52:05 -07:00
page_alloc.c
mm: add casts to/from gfp_t in gfp_to_alloc_flags()
2010-10-26 16:52:09 -07:00
page_cgroup.c
kmemleak: Annotate false positive in init_section_page_cgroup()
2010-07-19 11:54:14 +01:00
page_io.c
block: unify flags for struct bio and struct request
2010-08-07 18:20:39 +02:00
page_isolation.c
mm: page_isolation: codeclean fix comment and rm unneeded val init
2010-10-26 16:52:11 -07:00
page-writeback.c
writeback: remove the internal 5% low bound on dirty_ratio
2010-10-26 16:52:08 -07:00
pagewalk.c
pagemap: fix pfn calculation for hugepage
2010-04-07 08:38:04 -07:00
percpu-km.c
percpu: clear memory allocated with the km allocator
2010-10-02 10:28:42 +03:00
percpu-vm.c
percpu: move vmalloc based chunk management into percpu-vm.c
2010-05-01 08:30:50 +02:00
percpu.c
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2010-10-24 13:41:39 -07:00
prio_tree.c
…
quicklist.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
readahead.c
readahead.c: fix comment
2010-05-25 08:07:00 -07:00
rmap.c
rmap: make anon_vma_chain_free() static
2010-10-26 16:52:10 -07:00
shmem.c
convert get_sb_nodev() users
2010-10-29 04:16:31 -04:00
slab.c
replace nested max/min macros with {max,min}3 macro
2010-10-26 16:52:12 -07:00
slob.c
slob: fix gfp flags for order-0 page allocations
2010-10-02 10:24:28 +03:00
slub.c
slub: Fix slub_lock down/up imbalance
2010-11-14 16:53:11 +02:00
sparse-vmemmap.c
x86: Use memblock to replace early_res
2010-08-27 11:12:29 -07:00
sparse.c
sparsemem: on no vmemmap path put mem_map on node high too
2010-05-25 08:06:56 -07:00
swap_state.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
swap.c
fuse: use release_pages()
2010-10-27 18:03:17 -07:00
swapfile.c
/proc/swaps: support polling
2010-10-26 16:52:11 -07:00
thrash.c
mm: pass mm to grab_swap_token
2009-06-23 12:50:05 -07:00
truncate.c
check ATTR_SIZE contraints in inode_change_ok
2010-08-09 16:47:39 -04:00
util.c
export __get_user_pages_fast() function
2010-10-24 10:51:24 +02:00
vmalloc.c
mm: add vzalloc() and vzalloc_node() helpers
2010-10-26 16:52:10 -07:00
vmscan.c
vmscan: avoid setting zone congested if no page dirty
2010-11-12 07:55:31 -08:00
vmstat.c
vmstat: fix offset calculation on void*
2010-11-03 14:39:58 -04:00