Vladimir Davydov 1f47b61fb4 mm: memcontrol: fix swap counter leak on swapout from offline cgroup ... An offline memory cgroup might have anonymous memory or shmem left charged to it and no swap. Since only swap entries pin the id of an offline cgroup, such a cgroup will have no id and so an attempt to swapout its anon/shmem will not store memory cgroup info in the swap cgroup map. As a result, memcg->swap or memcg->memsw will never get uncharged from it and any of its ascendants. Fix this by always charging swapout to the first ancestor cgroup that hasn't released its id yet. [hannes@cmpxchg.org: add comment to mem_cgroup_swapout] [vdavydov@virtuozzo.com: use WARN_ON_ONCE() in mem_cgroup_id_get_online()] Link: http://lkml.kernel.org/r/20160803123445.GJ13263@esperanza Fixes: 73f576c04b ("mm: memcontrol: fix cgroup creation failure after many small jobs") Link: http://lkml.kernel.org/r/5336daa5c9a32e776067773d9da655d2dc126491.1470219853.git.vdavydov@virtuozzo.com Signed-off-by: Vladimir Davydov <vdavydov@virtuozzo.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Michal Hocko <mhocko@suse.com> Cc: <stable@vger.kernel.org> [3.19+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2016-08-11 16:58:13 -07:00
..
kasan	kasan: avoid overflowing quarantine size on low memory systems	2016-08-02 17:31:41 -04:00
backing-dev.c	block: fix bdi vs gendisk lifetime mismatch	2016-08-04 14:19:16 -06:00
balloon_compaction.c	mm: balloon: use general non-lru movable page feature	2016-07-26 16:19:19 -07:00
bootmem.c
cleancache.c
cma_debug.c
cma.c	mm/cma: silence warnings due to max() usage	2016-05-27 14:49:37 -07:00
cma.h
compaction.c	mm, compaction: simplify contended compaction handling	2016-07-28 16:07:41 -07:00
debug_page_ref.c
debug.c
dmapool.c
early_ioremap.c
fadvise.c	mm/fadvise.c: do not discard partial pages with POSIX_FADV_DONTNEED	2016-06-09 14:23:11 -07:00
failslab.c
filemap.c	block/mm: make bdev_ops->rw_page() take a bool for read/write	2016-08-07 14:41:02 -06:00
frame_vector.c
frontswap.c	mm, frontswap: convert frontswap_enabled to static key	2016-07-26 16:19:19 -07:00
gup.c	- ARM: GICv3 ITS emulation and various fixes. Removal of the old	2016-08-02 16:11:27 -04:00
highmem.c
huge_memory.c	mm, thp: remove __GFP_NORETRY from khugepaged and madvised allocations	2016-07-28 16:07:41 -07:00
hugetlb_cgroup.c	mm, hugetlb_cgroup: round limit_in_bytes down to hugepage size	2016-05-20 17:58:30 -07:00
hugetlb.c	mm/hugetlb: fix incorrect hugepages count during mem hotplug	2016-08-11 16:58:13 -07:00
hwpoison-inject.c
init-mm.c
internal.h	mm, compaction: simplify contended compaction handling	2016-07-28 16:07:41 -07:00
interval_tree.c
Kconfig	mm: disable CONFIG_MEMORY_HOTPLUG when KASAN is enabled	2016-08-04 20:02:09 -04:00
Kconfig.debug
khugepaged.c	mm, thp: remove __GFP_NORETRY from khugepaged and madvised allocations	2016-07-28 16:07:41 -07:00
kmemcheck.c
kmemleak-test.c
kmemleak.c	kmemleak: don't hang if user disables scanning early	2016-07-28 16:07:41 -07:00
ksm.c	mm: do not pass mm_struct into handle_mm_fault	2016-07-26 16:19:19 -07:00
list_lru.c
maccess.c	x86: remove more uaccess_32.h complexity	2016-05-22 17:21:27 -07:00
madvise.c	mm: make mmap_sem for write waits killable for mm syscalls	2016-05-23 17:04:14 -07:00
Makefile	Implements HARDENED_USERCOPY verification of copy_to_user/copy_from_user	2016-08-08 14:48:14 -07:00
memblock.c	mm/memblock.c: fix NULL dereference error	2016-08-04 20:02:09 -04:00
memcontrol.c	mm: memcontrol: fix swap counter leak on swapout from offline cgroup	2016-08-11 16:58:13 -07:00
memory_hotplug.c	mem-hotplug: alloc new page from a nearest neighbor node when mem-offline	2016-07-28 16:07:41 -07:00
memory-failure.c	mm: hwpoison: remove incorrect comments	2016-07-28 16:07:41 -07:00
memory.c	mm: move swap-in anonymous page into active list	2016-08-02 17:31:41 -04:00
mempolicy.c	mm, vmscan: move LRU lists to node	2016-07-28 16:07:41 -07:00
mempool.c	Revert "mm, mempool: only set __GFP_NOMEMALLOC if there are free elements"	2016-07-28 16:07:41 -07:00
memtest.c
migrate.c	mm, thp: remove __GFP_NORETRY from khugepaged and madvised allocations	2016-07-28 16:07:41 -07:00
mincore.c
mlock.c	mm, vmscan: move LRU lists to node	2016-07-28 16:07:41 -07:00
mm_init.c
mmap.c	mm: refuse wrapped vm_brk requests	2016-08-02 19:35:15 -04:00
mmu_context.c
mmu_notifier.c
mmzone.c
mprotect.c	mm: thp: check pmd_trans_unstable() after split_huge_pmd()	2016-07-26 16:19:19 -07:00
mremap.c	mm: thp: check pmd_trans_unstable() after split_huge_pmd()	2016-07-26 16:19:19 -07:00
msync.c
nobootmem.c
nommu.c	mm: introduce fault_env	2016-07-26 16:19:19 -07:00
oom_kill.c	mm, oom: tighten task_will_free_mem() locking	2016-07-28 16:07:41 -07:00
page_alloc.c	proc, meminfo: use correct helpers for calculating LRU sizes in meminfo	2016-08-11 16:58:13 -07:00
page_counter.c
page_ext.c	mm: use early_pfn_to_nid in page_ext_init	2016-05-27 14:49:37 -07:00
page_idle.c	mm, vmscan: move lru_lock to the node	2016-07-28 16:07:41 -07:00
page_io.c	mm: make __swap_writepage() use bio_set_op_attrs()	2016-08-07 14:41:02 -06:00
page_isolation.c	mm/page_isolation: clean up confused code	2016-07-26 16:19:19 -07:00
page_owner.c	mm/page_owner: use stackdepot to store stacktrace	2016-07-26 16:19:19 -07:00
page_poison.c	mm: check the return value of lookup_page_ext for all call sites	2016-06-03 15:06:22 -07:00
page-writeback.c	mm: remove reclaim and compaction retry approximations	2016-07-28 16:07:41 -07:00
pagewalk.c
percpu-km.c
percpu-vm.c
percpu.c	percpu: fix synchronization between synchronous map extension and chunk destruction	2016-05-25 11:48:25 -04:00
pgtable-generic.c
process_vm_access.c
quicklist.c
readahead.c	mm, memcg: use consistent gfp flags during readahead	2016-07-26 16:19:19 -07:00
rmap.c	rmap: fix compound check logic in page_remove_file_rmap	2016-08-10 16:40:56 -07:00
shmem.c	thp: move shmem_huge_enabled() outside of SYSFS ifdef	2016-08-10 16:40:56 -07:00
slab_common.c	mm: charge/uncharge kmemcg from generic page allocator paths	2016-07-26 16:19:19 -07:00
slab.c	Implements HARDENED_USERCOPY verification of copy_to_user/copy_from_user	2016-08-08 14:48:14 -07:00
slab.h	mm, kasan: switch SLUB to stackdepot, enable memory quarantine for SLUB	2016-07-28 16:07:41 -07:00
slob.c
slub.c	mm/slub.c: run free_partial() outside of the kmem_cache_node->list_lock	2016-08-10 16:40:56 -07:00
sparse-vmemmap.c	treewide: replace obsolete _refok by __ref	2016-08-02 17:31:41 -04:00
sparse.c	treewide: replace obsolete _refok by __ref	2016-08-02 17:31:41 -04:00
swap_cgroup.c
swap_state.c	mm: move most file-based accounting to the node	2016-07-28 16:07:41 -07:00
swap.c	mm, pagevec: release/reacquire lru_lock on pgdat change	2016-07-28 16:07:41 -07:00
swapfile.c	mm, frontswap: convert frontswap_enabled to static key	2016-07-26 16:19:19 -07:00
truncate.c	truncate: handle file thp	2016-07-26 16:19:19 -07:00
usercopy.c	mm: Hardened usercopy	2016-07-26 14:41:47 -07:00
userfaultfd.c
util.c	mm: move most file-based accounting to the node	2016-07-28 16:07:41 -07:00
vmacache.c
vmalloc.c	mm: charge/uncharge kmemcg from generic page allocator paths	2016-07-26 16:19:19 -07:00
vmpressure.c
vmscan.c	mm: vmscan: fix memcg-aware shrinkers not called on global reclaim	2016-08-02 17:31:41 -04:00
vmstat.c	mm: remove reclaim and compaction retry approximations	2016-07-28 16:07:41 -07:00
workingset.c	mm, workingset: make working set detection node-aware	2016-07-28 16:07:41 -07:00
z3fold.c	mm/z3fold.c: avoid modifying HEADLESS page and minor cleanup	2016-06-03 16:02:55 -07:00
zbud.c
zpool.c
zsmalloc.c	zsmalloc: Delete an unnecessary check before the function call "iput"	2016-07-28 16:07:41 -07:00
zswap.c	mm/zswap: use workqueue to destroy pool	2016-05-20 17:58:30 -07:00