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Hugh Dickins 750e8165f5 mm: fix BUG in __split_huge_page_pmd 
Occasionally we hit the BUG_ON(pmd_trans_huge(*pmd)) at the end of
__split_huge_page_pmd(): seen when doing madvise(,,MADV_DONTNEED).

It's invalid: we don't always have down_write of mmap_sem there: a racing
do_huge_pmd_wp_page() might have copied-on-write to another huge page
before our split_huge_page() got the anon_vma lock.

Forget the BUG_ON, just go back and try again if this happens.

Signed-off-by: Hugh Dickins <hughd@google.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: David Rientjes <rientjes@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-10-16 21:35:53 -07:00
..
backing-dev.c
mm/backing-dev.c: check user buffer length before copying data to the related user buffer
2013-09-11 15:58:03 -07:00
balloon_compaction.c
mm: introduce a common interface for balloon pages mobility
2012-12-11 17:22:26 -08:00
bootmem.c
mm: kill free_all_bootmem_node()
2013-07-03 16:07:39 -07:00
bounce.c
mm/bounce.c: fix a regression where MS_SNAP_STABLE (stable pages snapshotting) was ignored
2013-09-30 14:31:02 -07:00
cleancache.c
mm: cleancache: clean up cleancache_enabled
2013-04-30 17:04:01 -07:00
compaction.c
mm/compaction.c: periodically schedule when freeing pages
2013-09-30 14:31:01 -07:00
debug-pagealloc.c
mm, x86: Remove debug_pagealloc_enabled
2011-12-06 09:24:07 +01:00
dmapool.c
dmapool: make DMAPOOL_DEBUG detect corruption of free marker
2012-12-11 17:22:24 -08:00
fadvise.c
teach SYSCALL_DEFINE<n> how to deal with long long/unsigned long long
2013-03-03 22:46:22 -05:00
failslab.c
switch debugfs to umode_t
2012-01-03 22:54:56 -05:00
filemap_xip.c
lift sb_start_write() out of ->write()
2013-04-09 14:12:56 -04:00
filemap.c
mm: memcg: handle non-error OOM situations more gracefully
2013-10-16 21:35:53 -07:00
fremap.c
mm: save soft-dirty bits on file pages
2013-08-13 17:57:48 -07:00
frontswap.c
frontswap: fix incorrect zeroing and allocation size for frontswap_map
2013-06-12 16:29:46 -07:00
highmem.c
Some nice cleanups, and even a patch my wife did as a "live" demo for
2012-12-20 08:37:05 -08:00
huge_memory.c
mm: fix BUG in __split_huge_page_pmd
2013-10-16 21:35:53 -07:00
hugetlb_cgroup.c
cgroup: pass around cgroup_subsys_state instead of cgroup in file methods
2013-08-08 20:11:24 -04:00
hugetlb.c
mm: hugetlb: initialize PG_reserved for tail pages of gigantic compound pages
2013-10-16 21:35:52 -07:00
hwpoison-inject.c
mm/hwpoison: fix the lack of one reference count against poisoned page
2013-09-30 14:31:03 -07:00
init-mm.c
atomic: use <linux/atomic.h>
2011-07-26 16:49:47 -07:00
internal.h
mm: vmscan: fix do_try_to_free_pages() livelock
2013-09-11 15:58:01 -07:00
interval_tree.c
mm: add CONFIG_DEBUG_VM_RB build option
2012-10-09 16:22:42 +09:00
Kconfig
powerpc: Fix memory hotplug with sparse vmemmap
2013-10-03 17:21:38 +10:00
Kconfig.debug
mm: more intensive memory corruption debugging
2012-01-10 16:30:42 -08:00
kmemcheck.c
…
kmemleak-test.c
…
kmemleak.c
mm: replace strict_strtoul() with kstrtoul()
2013-09-11 15:57:11 -07:00
ksm.c
mm: replace strict_strtoul() with kstrtoul()
2013-09-11 15:57:11 -07:00
list_lru.c
list_lru: dynamically adjust node arrays
2013-09-10 18:56:32 -04:00
maccess.c
mm: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
madvise.c
mm/hwpoison: fix traversal of hugetlbfs pages to avoid printk flood
2013-09-30 14:31:02 -07:00
Makefile
list: add a new LRU list type
2013-09-10 18:56:30 -04:00
memblock.c
memblock, numa: binary search node id
2013-09-11 15:57:51 -07:00
memcontrol.c
fs: buffer: move allocation failure loop into the allocator
2013-10-16 21:35:53 -07:00
memory_hotplug.c
ACPI and power management fixes for 3.12-rc1
2013-09-12 11:22:45 -07:00
memory-failure.c
mm/hwpoison: fix false report on 2nd attempt at page recovery
2013-09-30 14:31:02 -07:00
memory.c
mm: memcg: handle non-error OOM situations more gracefully
2013-10-16 21:35:53 -07:00
mempolicy.c
mbind: add BUG_ON(!vma) in new_vma_page()
2013-09-11 15:57:50 -07:00
mempool.c
mm/mempool.c: convert kmalloc_node(...GFP_ZERO...) to kzalloc_node(...)
2013-09-11 15:58:14 -07:00
migrate.c
mm: migration: do not lose soft dirty bit if page is in migration state
2013-10-16 21:35:52 -07:00
mincore.c
swap: make each swap partition have one address_space
2013-02-23 17:50:17 -08:00
mlock.c
mm/mlock.c: prevent walking off the end of a pagetable in no-pmd configuration
2013-09-30 14:31:02 -07:00
mm_init.c
mm: tune vm_committed_as percpu_counter batching size
2013-07-03 16:07:32 -07:00
mmap.c
mm/mmap: remove unnecessary assignment
2013-09-11 15:58:13 -07:00
mmu_context.c
mm: remove old aio use_mm() comment
2013-05-07 18:38:27 -07:00
mmu_notifier.c
treewide: relase -> release
2013-06-28 14:34:33 +02:00
mmzone.c
mm: rename page struct field helpers
2013-02-23 17:50:18 -08:00
mprotect.c
mm: migration: do not lose soft dirty bit if page is in migration state
2013-10-16 21:35:52 -07:00
mremap.c
mm/mremap.c: call pud_free() after fail calling pmd_alloc()
2013-09-11 15:58:03 -07:00
msync.c
…
nobootmem.c
mm: concentrate modification of totalram_pages into the mm core
2013-07-03 16:07:33 -07:00
nommu.c
mm: remove free_area_cache
2013-07-10 18:11:34 -07:00
oom_kill.c
mm: memcg: handle non-error OOM situations more gracefully
2013-10-16 21:35:53 -07:00
page_alloc.c
revert "mm/memory-hotplug: fix lowmem count overflow when offline pages"
2013-09-30 14:31:01 -07:00
page_cgroup.c
memcontrol: use N_MEMORY instead N_HIGH_MEMORY
2012-12-12 17:38:32 -08:00
page_io.c
aio: Kill aio_rw_vect_retry()
2013-07-30 11:53:12 -04:00
page_isolation.c
mm: memory-hotplug: enable memory hotplug to handle hugepage
2013-09-11 15:57:48 -07:00
page-writeback.c
writeback: fix negative bdi max pause
2013-10-16 21:35:53 -07:00
pagewalk.c
mm/pagewalk.c: walk_page_range should avoid VM_PFNMAP areas
2013-05-24 16:22:53 -07:00
percpu-km.c
…
percpu-vm.c
mm: fix kernel-doc warnings
2012-06-20 14:39:36 -07:00
percpu.c
mm, percpu: Make sure percpu_alloc early parameter has an argument
2012-12-02 06:23:04 -08:00
pgtable-generic.c
mm: move pgtable related functions to right place
2013-09-11 15:57:30 -07:00
process_vm_access.c
Fix: compat_rw_copy_check_uvector() misuse in aio, readv, writev, and security keys
2013-03-12 11:05:45 -07:00
quicklist.c
mm: delete various needless include <linux/module.h>
2011-10-31 09:20:11 -04:00
readahead.c
readahead: make context readahead more conservative
2013-09-11 15:57:39 -07:00
rmap.c
thp: account anon transparent huge pages into NR_ANON_PAGES
2013-09-12 15:38:03 -07:00
shmem.c
initmpfs: make rootfs use tmpfs when CONFIG_TMPFS enabled
2013-09-11 15:59:37 -07:00
slab_common.c
slab_common: Do not check for duplicate slab names
2013-09-28 09:47:41 +03:00
slab.c
kernel: delete __cpuinit usage from all core kernel files
2013-07-14 19:36:59 -04:00
slab.h
memcg: check that kmem_cache has memcg_params before accessing it
2013-08-28 19:26:38 -07:00
slob.c
mm/sl[aou]b: Move kmallocXXX functions to common code
2013-09-04 20:51:33 +03:00
slub.c
Merge branch 'slab/next' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux
2013-09-15 07:15:06 -04:00
sparse-vmemmap.c
sparse-vmemmap: specify vmemmap population range in bytes
2013-04-29 15:54:35 -07:00
sparse.c
mm/sparse: introduce alloc_usemap_and_memmap
2013-09-11 15:58:01 -07:00
swap_state.c
lib/radix-tree.c: make radix_tree_node_alloc() work correctly within interrupt
2013-09-11 15:59:36 -07:00
swap.c
mm: make lru_add_drain_all() selective
2013-09-12 15:38:02 -07:00
swapfile.c
swap: fix set_blocksize race during swapon/swapoff
2013-10-16 21:35:53 -07:00
truncate.c
truncate: drop 'oldsize' truncate_pagecache() parameter
2013-09-12 15:38:02 -07:00
util.c
swap: clean-up #ifdef in page_mapping()
2013-09-11 15:57:31 -07:00
vmalloc.c
mm/vmalloc: use wrapper function get_vm_area_size to caculate size of vm area
2013-09-11 15:58:02 -07:00
vmpressure.c
Merge branch 'for-3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
2013-09-03 18:25:03 -07:00
vmscan.c
mm/vmscan.c: don't forget to free shrinker->nr_deferred
2013-10-16 21:35:52 -07:00
vmstat.c
mm: vmscan: fix do_try_to_free_pages() livelock
2013-09-11 15:58:01 -07:00
zbud.c
mm/zbud: fix some trivial typos in comments
2013-09-11 15:57:35 -07:00
zswap.c
mm/zswap: bugfix: memory leak when re-swapon
2013-10-16 21:35:52 -07:00