Hillf Danton a734bcc812 hugetlb: detect race upon page allocation failure during COW ... Currently we are not rechecking pte_same in hugetlb_cow after we take ptl lock again in the page allocation failure code path and simply retry again. This is not an issue at the moment because hugetlb fault path is protected by hugetlb_instantiation_mutex so we cannot race. The original page is locked and so we cannot race even with the page migration. Let's add the pte_same check anyway as we want to be consistent with the other check later in this function and be safe if we ever remove the mutex. [mhocko@suse.cz: reworded the changelog] Signed-off-by: Hillf Danton <dhillf@gmail.com> Signed-off-by: Michal Hocko <mhocko@suse.cz> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Johannes Weiner <jweiner@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2012-01-10 16:30:42 -08:00
..
backing-dev.c	freezer: implement and use kthread_freezable_should_stop()	2011-11-21 12:32:23 -08:00
bootmem.c	mm: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
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
compaction.c	convert 'memory' sysdev_class to a regular subsystem	2011-12-21 14:48:43 -08:00
debug-pagealloc.c	debug-pagealloc: add support for highmem pages	2011-10-31 17:30:48 -07:00
dmapool.c	mm: fix implicit stat.h usage in dmapool.c	2011-10-31 09:20:12 -04:00
fadvise.c
failslab.c	switch debugfs to umode_t	2012-01-03 22:54:56 -05:00
filemap.c	should_remove_suid(): inode->i_mode is umode_t	2012-01-03 22:55:14 -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
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	thp: reduce khugepaged freezing latency	2011-12-09 07:50:28 -08:00
hugetlb.c	hugetlb: detect race upon page allocation failure during COW	2012-01-10 16:30:42 -08:00
hwpoison-inject.c
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
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	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2012-01-09 14:46:52 -08:00
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
memory_hotplug.c	mm: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
mempolicy.c	mm/mempolicy.c: refix mbind_range() vma issue	2011-12-29 16:31:57 -08:00
mempool.c	mm: Map most files to use export.h instead of module.h	2011-10-31 09:20:12 -04:00
migrate.c	mm: migrate: one less atomic operation	2012-01-10 16:30:41 -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	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
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	thp: mremap support and TLB optimization	2011-10-31 17:30:48 -07:00
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	Merge branch 'master' into pm-sleep	2011-12-21 21:59:45 +01:00
page-writeback.c	mm/page-writeback.c: make determine_dirtyable_memory static again	2012-01-10 16:30:41 -08:00
page_alloc.c	mm: avoid livelock on !__GFP_FS allocations	2012-01-10 16:30:42 -08:00
page_cgroup.c	mm/page_cgroup.c: quiet sparse noise	2011-11-02 16:07:00 -07:00
page_io.c
page_isolation.c
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
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	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
shmem.c	vfs: switch ->show_options() to struct dentry *	2012-01-06 23:19:54 -05:00
slab.c	tracing/mm: Move include of trace/events/kmem.h out of header into slab.c	2012-01-09 14:19:33 -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	Merge branch 'for-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu	2012-01-09 13:08:28 -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.c	mm: add free_hot_cold_page_list() helper	2012-01-10 16:30:41 -08:00
swap_state.c	fs: move code out of buffer.c	2012-01-03 22:54:07 -05:00
swapfile.c	mm: avoid livelock on !__GFP_FS allocations	2012-01-10 16:30:42 -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	Merge branch 'devel-stable' into for-linus	2012-01-05 13:24:33 +00:00
vmscan.c	mm: add free_hot_cold_page_list() helper	2012-01-10 16:30:41 -08:00
vmstat.c	mm/vmstat.c: cache align vm_stat	2011-10-31 17:30:51 -07:00