Naoya Horiguchi 524fca1e73 HWPOISON: fix misjudgement of page_action() for errors on mlocked pages ... memory_failure() can't handle memory errors on mlocked pages correctly, because page_action() judges such errors as ones on "unknown pages" instead of ones on "unevictable LRU page" or "mlocked LRU page". In order to determine page_state page_action() checks page flags at the timing of the judgement, but such page flags are not the same with those just after memory_failure() is called, because memory_failure() does unmapping of the error pages before doing page_action(). This unmapping changes the page state, especially page_remove_rmap() (called from try_to_unmap_one()) clears PG_mlocked, so page_action() can't catch mlocked pages after that. With this patch, we store the page flag of the error page before doing unmap, and (only) if the first check with page flags at the time decided the error page is unknown, we do the second check with the stored page flag. This implementation doesn't change error handling for the page types for which the first check can determine the page state correctly. [akpm@linux-foundation.org: tweak comments] Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Tony Luck <tony.luck@intel.com> Cc: Chen Gong <gong.chen@linux.intel.com> Cc: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2013-02-23 17:50:22 -08:00
..
backing-dev.c	bdi: allow block devices to say that they require stable page writes	2013-02-21 17:22:19 -08:00
balloon_compaction.c	mm: introduce a common interface for balloon pages mobility	2012-12-11 17:22:26 -08:00
bootmem.c	mm: Add alloc_bootmem_low_pages_nopanic()	2013-01-29 19:32:59 -08:00
bounce.c	block: optionally snapshot page contents to provide stable pages during write	2013-02-21 17:22:20 -08:00
cleancache.c	->encode_fh() API change	2012-05-29 23:28:33 -04:00
compaction.c	mm: add & use zone_end_pfn() and zone_spans_pfn()	2013-02-23 17:50:20 -08:00
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	switch simple cases of fget_light to fdget	2012-09-26 22:20:08 -04:00
failslab.c	switch debugfs to umode_t	2012-01-03 22:54:56 -05:00
filemap.c	mm: only enforce stable page writes if the backing device requires it	2013-02-21 17:22:19 -08:00
filemap_xip.c	mm: move all mmu notifier invocations to be done outside the PT lock	2012-10-09 16:22:58 +09:00
fremap.c	mm: introduce VM_POPULATE flag to better deal with racy userspace programs	2013-02-23 17:50:11 -08:00
frontswap.c	frontswap: support exclusive gets if tmem backend is capable	2012-09-21 10:38:12 -04:00
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: use NUMA_NO_NODE	2013-02-23 17:50:21 -08:00
hugetlb.c	mm/hugetlb.c: convert to pr_foo()	2013-02-23 17:50:09 -08:00
hugetlb_cgroup.c	mm/hugetlb: create hugetlb cgroup file in hugetlb_init	2012-12-18 15:02:15 -08:00
hwpoison-inject.c	memcg: rename config variables	2012-07-31 18:42:43 -07:00
init-mm.c	atomic: use <linux/atomic.h>	2011-07-26 16:49:47 -07:00
internal.h	mm: directly use __mlock_vma_pages_range() in find_extend_vma()	2013-02-23 17:50:11 -08:00
interval_tree.c	mm: add CONFIG_DEBUG_VM_RB build option	2012-10-09 16:22:42 +09:00
Kconfig	memory-hotplug: implement register_page_bootmem_info_section of sparse-vmemmap	2013-02-23 17:50:12 -08:00
Kconfig.debug	mm: more intensive memory corruption debugging	2012-01-10 16:30:42 -08:00
kmemcheck.c
kmemleak-test.c	kmemleak: remove memset by using kzalloc	2011-01-27 18:31:51 +00:00
kmemleak.c	mm: add & use zone_end_pfn() and zone_spans_pfn()	2013-02-23 17:50:20 -08:00
ksm.c	ksm: stop hotremove lockdep warning	2013-02-23 17:50:20 -08:00
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: make madvise(MADV_WILLNEED) support swap file prefetch	2013-02-23 17:50:10 -08:00
Makefile	mm: introduce a common interface for balloon pages mobility	2012-12-11 17:22:26 -08:00
memblock.c	mm/memblock.c: use CONFIG_HAVE_MEMBLOCK_NODE_MAP to protect movablecore_map in memblock_overlaps_region().	2013-02-23 17:50:14 -08:00
memcontrol.c	memcg: stop warning on memcg_propagate_kmem	2013-02-23 17:50:22 -08:00
memory-failure.c	HWPOISON: fix misjudgement of page_action() for errors on mlocked pages	2013-02-23 17:50:22 -08:00
memory.c	ksm: remove old stable nodes more thoroughly	2013-02-23 17:50:19 -08:00
memory_hotplug.c	mm/memory_hotplug: use pgdat_end_pfn() instead of open coding the same.	2013-02-23 17:50:21 -08:00
mempolicy.c	mm: use NUMA_NO_NODE	2013-02-23 17:50:21 -08:00
mempool.c	mempool: add @gfp_mask to mempool_create_node()	2012-06-25 11:53:47 +02:00
migrate.c	mm: remove offlining arg to migrate_pages	2013-02-23 17:50:19 -08:00
mincore.c	swap: make each swap partition have one address_space	2013-02-23 17:50:17 -08:00
mlock.c	mm/mlock.c: document scary-looking stack expansion mlock chain	2013-02-23 17:50:20 -08:00
mm_init.c	mm: init: report on last-nid information stored in page->flags	2013-02-23 17:50:18 -08:00
mmap.c	mm/rmap: rename anon_vma_unlock() => anon_vma_unlock_write()	2013-02-23 17:50:17 -08:00
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	2013-02-23 17:50:21 -08:00
mmzone.c	mm: rename page struct field helpers	2013-02-23 17:50:18 -08:00
mprotect.c	mm/mprotect.c: coding-style cleanups	2012-12-18 15:02:15 -08:00
mremap.c	mm/rmap: rename anon_vma_unlock() => anon_vma_unlock_write()	2013-02-23 17:50:17 -08:00
msync.c
nobootmem.c	mm: Add alloc_bootmem_low_pages_nopanic()	2013-01-29 19:32:59 -08:00
nommu.c	swap: add per-partition lock for swapfile	2013-02-23 17:50:17 -08:00
oom_kill.c	memcg, oom: provide more precise dump info while memcg oom happening	2013-02-23 17:50:08 -08:00
page-writeback.c	page-writeback.c: subtract min_free_kbytes from dirtyable memory	2013-02-23 17:50:17 -08:00
page_alloc.c	mm: fix return type for functions nr_free_*_pages	2013-02-23 17:50:21 -08:00
page_cgroup.c	memcontrol: use N_MEMORY instead N_HIGH_MEMORY	2012-12-12 17:38:32 -08:00
page_io.c	mm: add support for direct_IO to highmem pages	2012-07-31 18:42:47 -07:00
page_isolation.c	mm: fix zone_watermark_ok_safe() accounting of isolated pages	2013-01-04 16:11:46 -08:00
pagewalk.c	thp: change split_huge_page_pmd() interface	2012-12-12 17:38:31 -08:00
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: Only flush the TLB when clearing an accessible pte	2012-12-11 14:28:34 +00:00
process_vm_access.c	aio/vfs: cleanup of rw_copy_check_uvector() and compat_rw_copy_check_uvector()	2012-05-31 17:49:32 -07:00
quicklist.c	mm: delete various needless include <linux/module.h>	2011-10-31 09:20:11 -04:00
readahead.c	switch simple cases of fget_light to fdget	2012-09-26 22:20:08 -04:00
rmap.c	mm/rmap: rename anon_vma_unlock() => anon_vma_unlock_write()	2013-02-23 17:50:17 -08:00
shmem.c	mm: shmem: use new radix tree iterator	2013-02-23 17:50:20 -08:00
slab.c	memcg: add comments clarifying aspects of cache attribute propagation	2012-12-18 15:02:15 -08:00
slab.h	slab: propagate tunable values	2012-12-18 15:02:14 -08:00
slab_common.c	slab: propagate tunable values	2012-12-18 15:02:14 -08:00
slob.c	mm: rename page struct field helpers	2013-02-23 17:50:18 -08:00
slub.c	mm: rename page struct field helpers	2013-02-23 17:50:18 -08:00
sparse-vmemmap.c	mm: delete various needless include <linux/module.h>	2011-10-31 09:20:11 -04:00
sparse.c	memory-failure: use num_poisoned_pages instead of mce_bad_pages	2013-02-23 17:50:15 -08:00
swap.c	swap: make each swap partition have one address_space	2013-02-23 17:50:17 -08:00
swap_state.c	swap: add per-partition lock for swapfile	2013-02-23 17:50:17 -08:00
swapfile.c	swap: add per-partition lock for swapfile	2013-02-23 17:50:17 -08:00
truncate.c	mm: drop vmtruncate	2012-12-20 18:46:29 -05:00
util.c	swap: make each swap partition have one address_space	2013-02-23 17:50:17 -08:00
vmalloc.c	mm: use NUMA_NO_NODE	2013-02-23 17:50:21 -08:00
vmscan.c	vmscan: change type of vm_total_pages to unsigned long	2013-02-23 17:50:22 -08:00
vmstat.c	mm: add & use zone_end_pfn() and zone_spans_pfn()	2013-02-23 17:50:20 -08:00