Michal Hocko 33cb876e94 vmpressure: make sure there are no events queued after memcg is offlined ...

vmpressure is called synchronously from reclaim where the target_memcg
is guaranteed to be alive but the eventfd is signaled from the work
queue context.  This means that memcg (along with vmpressure structure
which is embedded into it) might go away while the work item is pending
which would result in use-after-release bug.

We have two possible ways how to fix this.  Either vmpressure pins memcg
before it schedules vmpr->work and unpin it in vmpressure_work_fn or
explicitely flush the work item from the css_offline context (as
suggested by Tejun).

This patch implements the later one and it introduces vmpressure_cleanup
which flushes the vmpressure work queue item item.  It hooks into
mem_cgroup_css_offline after the memcg itself is cleaned up.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Michal Hocko <mhocko@suse.cz>
Reported-by: Tejun Heo <tj@kernel.org>
Cc: Anton Vorontsov <anton.vorontsov@linaro.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Li Zefan <lizefan@huawei.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2013-07-31 14:41:04 -07:00

..

backing-dev.c

sysfs.h: add __ATTR_RW() macro

2013-07-16 10:57:36 -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

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

mm: remove unused VM_<READfoo> macros and expand other in-place

2013-07-09 10:33:23 -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

thp, mm: avoid PageUnevictable on active/inactive lru lists

2013-07-31 14:41:03 -07:00

hugetlb_cgroup.c

mm/hugetlb: create hugetlb cgroup file in hugetlb_init

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

hugetlb.c

mm: correctly update zone->managed_pages

2013-07-03 16:07:33 -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: remove unused __put_page()

2013-07-09 10:33:22 -07:00

interval_tree.c

mm: add CONFIG_DEBUG_VM_RB build option

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

Kconfig

zswap: add to mm/

2013-07-10 18:11:34 -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

zswap: add to mm/

2013-07-10 18:11:34 -07:00

memblock.c

mm/memblock.c: fix wrong comment in __next_free_mem_range()

2013-07-09 10:33:23 -07:00

memcontrol.c

vmpressure: make sure there are no events queued after memcg is offlined

2013-07-31 14:41:04 -07:00

memory_hotplug.c

mm/memory_hotplug.c: fix return value of online_pages()

2013-07-09 10:33:25 -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: remove unused VM_<READfoo> macros and expand other in-place

2013-07-09 10:33:23 -07:00

mempolicy.c

mm: mempolicy: fix mbind_range() && vma_adjust() interaction

2013-07-31 14:41:02 -07:00

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: tune vm_committed_as percpu_counter batching size

2013-07-03 16:07:32 -07:00

mmap.c

mm: mempolicy: fix mbind_range() && vma_adjust() interaction

2013-07-31 14:41:02 -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/mprotect.c: coding-style cleanups

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

mremap.c

mm: mremap: validate input before taking lock

2013-07-09 10:33:20 -07:00

msync.c

sanitize vfs_fsync calling conventions

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

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

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

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

page_alloc.c

mm: honor min_free_kbytes set by user

2013-07-09 10:33:25 -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

kernel: delete __cpuinit usage from all core kernel files

2013-07-14 19:36:59 -04:00

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/THP: add pmd args to pgtable deposit and withdraw APIs

2013-06-20 16:55:07 +10:00

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 unused VM_<READfoo> macros and expand other in-place

2013-07-09 10:33:23 -07:00

shmem.c

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

2013-07-03 14:04:58 -07:00

slab_common.c

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

2013-07-14 15:14:29 -07:00

slab.c

kernel: delete __cpuinit usage from all core kernel files

2013-07-14 19:36:59 -04:00

slab.h

mm/slab: Give s_next and s_stop slab-specific names

2013-07-08 11:02:17 +03:00

slob.c

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

2013-07-14 15:14:29 -07:00

slub.c

kernel: delete __cpuinit usage from all core kernel files

2013-07-14 19:36:59 -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.c: put clear_hwpoisoned_pages within CONFIG_MEMORY_HOTREMOVE

2013-07-09 10:33:22 -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

thp, mm: avoid PageUnevictable on active/inactive lru lists

2013-07-31 14:41:03 -07:00

swapfile.c

swap: discard while swapping only if SWAP_FLAG_DISCARD_PAGES

2013-07-03 16:07:32 -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

mm: remove free_area_cache

2013-07-10 18:11:34 -07:00

vmalloc.c

mm/vmalloc.c: fix an overflow bug in alloc_vmap_area()

2013-07-09 10:33:23 -07:00

vmpressure.c

vmpressure: make sure there are no events queued after memcg is offlined

2013-07-31 14:41:04 -07:00

vmscan.c

mm: vmscan: do not scale writeback pages when deciding whether to set ZONE_WRITEBACK

2013-07-09 10:33:23 -07:00

vmstat.c

kernel: delete __cpuinit usage from all core kernel files

2013-07-14 19:36:59 -04:00

zbud.c

mm: zbud: fix condition check on allocation size

2013-07-31 14:41:03 -07:00

zswap.c

zswap: add to mm/

2013-07-10 18:11:34 -07:00