Naoya Horiguchi f15bdfa802 mm/memory-failure.c: fix memory leak in successful soft offlining ...

After a successful page migration by soft offlining, the source page is
not properly freed and it's never reusable even if we unpoison it
afterward.

This is caused by the race between freeing page and setting PG_hwpoison.
In successful soft offlining, the source page is put (and the refcount
becomes 0) by putback_lru_page() in unmap_and_move(), where it's linked
to pagevec and actual freeing back to buddy is delayed.  So if
PG_hwpoison is set for the page before freeing, the freeing does not
functions as expected (in such case freeing aborts in
free_pages_prepare() check.)

This patch tries to make sure to free the source page before setting
PG_hwpoison on it.  To avoid reallocating, the page keeps
MIGRATE_ISOLATE until after setting PG_hwpoison.

This patch also removes obsolete comments about "keeping elevated
refcount" because what they say is not true.  Unlike memory_failure(),
soft_offline_page() uses no special page isolation code, and the
soft-offlined pages have no elevated.

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2013-07-03 16:07:31 -07:00

..

backing-dev.c

writeback: expose the bdi_wq workqueue

2013-04-01 19:08:06 -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: Add alloc_bootmem_low_pages_nopanic()

2013-01-29 19:32:59 -08:00

bounce.c

Merge branch 'for-3.10/core' of git://git.kernel.dk/linux-block

2013-05-08 10:13:35 -07:00

cleancache.c

mm: cleancache: clean up cleancache_enabled

2013-04-30 17:04:01 -07:00

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

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

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2013-05-01 17:51:54 -07:00

fremap.c

Revert "mm: introduce VM_POPULATE flag to better deal with racy userspace programs"

2013-03-28 17:45:51 -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: soft-dirty bits for user memory changes tracking

2013-07-03 16:07:26 -07:00

hugetlb_cgroup.c

mm/hugetlb: create hugetlb cgroup file in hugetlb_init

2012-12-18 15:02:15 -08:00

hugetlb.c

Main features:

2013-07-03 10:31:38 -07:00

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: accelerate munlock() treatment of THP pages

2013-02-27 19:10:09 -08:00

interval_tree.c

mm: add CONFIG_DEBUG_VM_RB build option

2012-10-09 16:22:42 +09:00

Kconfig

mm: soft-dirty bits for user memory changes tracking

2013-07-03 16:07:26 -07:00

Kconfig.debug

mm: more intensive memory corruption debugging

2012-01-10 16:30:42 -08:00

kmemcheck.c

kmemcheck: Fix build errors due to missing slab.h

2010-03-30 22:02:32 +09:00

kmemleak-test.c

kmemleak: remove memset by using kzalloc

2011-01-27 18:31:51 +00:00

kmemleak.c

hlist: drop the node parameter from iterators

2013-02-27 19:10:24 -08:00

ksm.c

ksm: fix m68k build: only NUMA needs pfn_to_nid

2013-03-08 15:05:34 -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: madvise: complete input validation before taking lock

2013-04-29 15:54:37 -07:00

Makefile

memcg: add memory.pressure_level events

2013-04-29 15:54:38 -07:00

memblock.c

memblock: fix missing comment of memblock_insert_region()

2013-04-29 15:54:38 -07:00

memcontrol.c

mm, memcg: don't take task_lock in task_in_mem_cgroup

2013-07-03 16:07:26 -07:00

memory_hotplug.c

memory_hotplug: use pgdat_resize_lock() in __offline_pages()

2013-07-03 16:07:29 -07:00

memory-failure.c

mm/memory-failure.c: fix memory leak in successful soft offlining

2013-07-03 16:07:31 -07:00

memory.c

mm: use vma_pages() to replace (vm_end - vm_start) >> PAGE_SHIFT

2013-07-03 16:07:26 -07:00

mempolicy.c

mm/mempolicy.c: fix sp_node_init() argument ordering

2013-03-08 15:05:34 -08:00

mempool.c

mempool: add @gfp_mask to mempool_create_node()

2012-06-25 11:53:47 +02:00

migrate.c

mm: migration: add migrate_entry_wait_huge()

2013-06-12 16:29:46 -07:00

mincore.c

swap: make each swap partition have one address_space

2013-02-23 17:50:17 -08:00

mlock.c

Revert "mm: introduce VM_POPULATE flag to better deal with racy userspace programs"

2013-03-28 17:45:51 -07:00

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: use vma_pages() to replace (vm_end - vm_start) >> PAGE_SHIFT

2013-07-03 16:07:26 -07:00

mmu_context.c

mm: remove old aio use_mm() comment

2013-05-07 18:38:27 -07:00

mmu_notifier.c

mm: mmu_notifier: re-fix freed page still mapped in secondary MMU

2013-05-24 16:22:51 -07:00

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: soft-dirty bits for user memory changes tracking

2013-07-03 16:07:26 -07:00

msync.c

sanitize vfs_fsync calling conventions

2010-05-21 18:31:21 -04:00

nobootmem.c

mm, nobootmem: do memset() after memblock_reserve()

2013-04-29 15:54:39 -07:00

nommu.c

mm/nommu.c: add additional check for vread() just like vwrite() has done

2013-07-03 16:07:31 -07:00

oom_kill.c

memcg, oom: provide more precise dump info while memcg oom happening

2013-02-23 17:50:08 -08:00

page_alloc.c

mm/page_alloc.c: add additional checking and return value for the 'table->data'

2013-07-03 16:07:31 -07:00

page_cgroup.c

memcontrol: use N_MEMORY instead N_HIGH_MEMORY

2012-12-12 17:38:32 -08:00

page_io.c

mm: remove compressed copy from zram in-memory

2013-07-03 16:07:26 -07:00

page_isolation.c

mm: fix zone_watermark_ok_safe() accounting of isolated pages

2013-01-04 16:11:46 -08:00

page-writeback.c

mm: make snapshotting pages for stable writes a per-bio operation

2013-04-29 15:54:33 -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: clear memory allocated with the km allocator

2010-10-02 10:28:42 +03:00

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

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

mm: change invalidatepage prototype to accept length

2013-05-21 23:17:23 -04:00

rmap.c

mm: remove lru parameter from __lru_cache_add and lru_cache_add_lru

2013-07-03 16:07:31 -07:00

shmem.c

vfs: export lseek_execute() to modules

2013-07-03 16:23:27 +04:00

slab_common.c

slab: prevent warnings when allocating with __GFP_NOWARN

2013-06-13 10:01:58 +03:00

slab.c

Merge branch 'slab/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux

2013-05-07 08:42:20 -07:00

slab.h

slab: Common definition for kmem_cache_node

2013-02-01 12:32:09 +02:00

slob.c

mm: rename page struct field helpers

2013-02-23 17:50:18 -08:00

slub.c

Merge branch 'slab/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux

2013-05-07 08:42:20 -07:00

sparse-vmemmap.c

sparse-vmemmap: specify vmemmap population range in bytes

2013-04-29 15:54:35 -07:00

sparse.c

mm, hotplug: avoid compiling memory hotremove functions when disabled

2013-04-29 15:54:37 -07:00

swap_state.c

swap: avoid read_swap_cache_async() race to deadlock while waiting on discard I/O completion

2013-06-12 16:29:45 -07:00

swap.c

mm: remove lru parameter from __lru_cache_add and lru_cache_add_lru

2013-07-03 16:07:31 -07:00

swapfile.c

frontswap: fix incorrect zeroing and allocation size for frontswap_map

2013-06-12 16:29:46 -07:00

truncate.c

mm: teach truncate_inode_pages_range() to handle non page aligned ranges

2013-05-27 23:32:35 -04:00

util.c

swap: make each swap partition have one address_space

2013-02-23 17:50:17 -08:00

vmalloc.c

vmalloc: introduce remap_vmalloc_range_partial

2013-07-03 16:07:30 -07:00

vmpressure.c

memcg: add memory.pressure_level events

2013-04-29 15:54:38 -07:00

vmscan.c

mm: remove lru parameter from __lru_cache_add and lru_cache_add_lru

2013-07-03 16:07:31 -07:00

vmstat.c

mm/vmstat: add note on safety of drain_zonestat

2013-04-29 15:54:38 -07:00