Andi Kleen f37d4298aa hwpoison: fix race with changing page during offlining ... When a hwpoison page is locked it could change state due to parallel modifications. The original compound page can be torn down and then this 4k page becomes part of a differently-size compound page is is a standalone regular page. Check after the lock if the page is still the same compound page. We could go back, grab the new head page and try again but it should be quite rare, so I thought this was safest. A retry loop would be more difficult to test and may have more side effects. The hwpoison code by design only tries to handle cases that are reasonably common in workloads, as visible in page-flags. I'm not really that concerned about handling this (likely rare case), just not crashing on it. Signed-off-by: Andi Kleen <ak@linux.intel.com> Acked-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2014-08-06 18:01:19 -07:00
..
backing-dev.c	arch: Mass conversion of smp_mb__*()	2014-04-18 14:20:48 +02:00
balloon_compaction.c
bootmem.c
cleancache.c
cma.c	mm, CMA: clean-up log message	2014-08-06 18:01:16 -07:00
compaction.c	mm, compaction: properly signal and act upon lock and need_sched() contention	2014-06-04 16:54:11 -07:00
debug-pagealloc.c
dmapool.c	mm/dmapool.c: reuse devres_release() to free resources	2014-06-04 16:54:08 -07:00
early_ioremap.c
fadvise.c
failslab.c
filemap.c	mm: replace init_page_accessed by __SetPageReferenced	2014-08-06 18:01:19 -07:00
filemap_xip.c
fremap.c	mm: mark remap_file_pages() syscall as deprecated	2014-06-06 16:08:17 -07:00
frontswap.c	swap: change swap_list_head to plist, add swap_avail_head	2014-06-04 16:54:07 -07:00
gup.c	mm: cleanup __get_user_pages()	2014-06-04 16:54:05 -07:00
highmem.c
huge_memory.c	mm: huge_memory: use GFP_TRANSHUGE when charging huge pages	2014-08-06 18:01:17 -07:00
hugetlb.c	mm,hugetlb: simplify error handling in hugetlb_cow()	2014-08-06 18:01:19 -07:00
hugetlb_cgroup.c	cgroup: replace cgroup_add_cftypes() with cgroup_add_legacy_cftypes()	2014-07-15 11:05:09 -04:00
hwpoison-inject.c	mm/hwpoison-inject.c: remove unnecessary null test before debugfs_remove_recursive	2014-08-06 18:01:19 -07:00
init-mm.c
internal.h	mm/internal.h: use nth_page	2014-08-06 18:01:16 -07:00
interval_tree.c
iov_iter.c	bio_vec-backed iov_iter	2014-05-06 17:39:45 -04:00
Kconfig	CMA: generalize CMA reserved area management functionality	2014-08-06 18:01:16 -07:00
Kconfig.debug
kmemcheck.c
kmemleak-test.c	mm/kmemleak-test.c: use pr_fmt for logging	2014-06-06 16:08:18 -07:00
kmemleak.c	mm: introduce kmemleak_update_trace()	2014-06-06 16:08:17 -07:00
ksm.c	sched: Remove proliferation of wait_on_bit() action functions	2014-07-16 15:10:39 +02:00
list_lru.c
maccess.c
madvise.c	mm: update the description for madvise_remove	2014-08-06 18:01:18 -07:00
Makefile	CMA: generalize CMA reserved area management functionality	2014-08-06 18:01:16 -07:00
memblock.c	mm/memblock.c: call kmemleak directly from memblock_(alloc|free)	2014-06-06 16:08:17 -07:00
memcontrol.c	mm: memcontrol: do not acquire page_cgroup lock for kmem pages	2014-08-06 18:01:17 -07:00
memory-failure.c	hwpoison: fix race with changing page during offlining	2014-08-06 18:01:19 -07:00
memory.c	mm/memory.c: use entry = ACCESS_ONCE(*pte) in handle_pte_fault()	2014-08-06 18:01:15 -07:00
memory_hotplug.c	mem-hotplug: introduce MMOP_OFFLINE to replace the hard coding -1	2014-08-06 18:01:16 -07:00
mempolicy.c	Merge branch 'for-3.16-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2014-07-10 11:38:23 -07:00
mempool.c	mm/mempool.c: update the kmemleak stack trace for mempool allocations	2014-06-06 16:08:17 -07:00
migrate.c	mm: fix direct reclaim writeback regression	2014-07-26 14:38:50 -07:00
mincore.c
mlock.c
mm_init.c
mmap.c	mm: catch memory commitment underflow	2014-08-06 18:01:19 -07:00
mmu_context.c
mmu_notifier.c
mmzone.c
mprotect.c
mremap.c	mm, thp: close race between mremap() and split_huge_page()	2014-05-11 17:55:48 +09:00
msync.c	msync: fix incorrect fstart calculation	2014-07-03 09:21:53 -07:00
nobootmem.c	mm/memblock.c: call kmemleak directly from memblock_(alloc|free)	2014-06-06 16:08:17 -07:00
nommu.c	mm: nommu: per-thread vma cache fix	2014-06-23 16:47:43 -07:00
oom_kill.c
page-writeback.c	mm/page-writeback.c: fix divide by zero in bdi_dirty_limits()	2014-07-30 17:16:13 -07:00
page_alloc.c	mm: export NR_SHMEM via sysinfo(2) / si_meminfo() interfaces	2014-08-06 18:01:19 -07:00
page_cgroup.c
page_io.c	fix __swap_writepage() compile failure on old gcc versions	2014-06-14 19:30:48 -05:00
page_isolation.c
pagewalk.c
percpu-km.c
percpu-vm.c
percpu.c	percpu: Use ALIGN macro instead of hand coding alignment calculation	2014-06-19 11:00:27 -04:00
pgtable-generic.c
process_vm_access.c	start adding the tag to iov_iter	2014-05-06 17:32:49 -04:00
quicklist.c
readahead.c	mm/readahead.c: remove unused file_ra_state from count_history_pages	2014-08-06 18:01:15 -07:00
rmap.c	mm/rmap.c: fix pgoff calculation to handle hugepage correctly	2014-07-23 15:10:54 -07:00
shmem.c	mm: replace init_page_accessed by __SetPageReferenced	2014-08-06 18:01:19 -07:00
slab.c	mm/slab.c: fix comments	2014-08-06 18:01:15 -07:00
slab.h	slab: convert last use of __FUNCTION__ to __func__	2014-08-06 18:01:15 -07:00
slab_common.c	mm: move slab related stuff from util.c to slab_common.c	2014-08-06 18:01:15 -07:00
slob.c	slab: get_online_mems for kmem_cache_{create,destroy,shrink}	2014-06-04 16:53:59 -07:00
slub.c	slab: fix the alias count (via sysfs) of slab cache	2014-08-06 18:01:15 -07:00
sparse-vmemmap.c
sparse.c
swap.c	mm: replace init_page_accessed by __SetPageReferenced	2014-08-06 18:01:19 -07:00
swap_state.c	mm: page_alloc: convert hot/cold parameter and immediate callers to bool	2014-06-04 16:54:09 -07:00
swapfile.c	mm/swapfile.c: delete the "last_in_cluster < scan_base" loop in the body of scan_swap_map()	2014-06-04 16:54:12 -07:00
truncate.c	mm/fs: fix pessimization in hole-punching pagecache	2014-07-23 15:10:55 -07:00
util.c	mm: move slab related stuff from util.c to slab_common.c	2014-08-06 18:01:15 -07:00
vmacache.c	mm,vmacache: optimize overflow system-wide flushing	2014-06-04 16:53:57 -07:00
vmalloc.c	mm, vmalloc: constify allocation mask	2014-08-06 18:01:18 -07:00
vmpressure.c
vmscan.c	mm: vmscan: clean up struct scan_control	2014-08-06 18:01:18 -07:00
vmstat.c	mm: use the light version __mod_zone_page_state in mlocked_vma_newpage()	2014-06-04 16:54:07 -07:00
workingset.c
zbud.c	mm/zbud.c: make size unsigned like unique callsite	2014-06-04 16:54:13 -07:00
zsmalloc.c	zsmalloc: fixup trivial zs size classes value in comments	2014-06-04 16:54:13 -07:00
zswap.c	mm/zswap: NUMA aware allocation for zswap_dstmem	2014-06-04 16:54:14 -07:00