Michal Hocko ba4877b9ca vmstat: do not use deferrable delayed work for vmstat_update ... Vinayak Menon has reported that an excessive number of tasks was throttled in the direct reclaim inside too_many_isolated() because NR_ISOLATED_FILE was relatively high compared to NR_INACTIVE_FILE. However it turned out that the real number of NR_ISOLATED_FILE was 0 and the per-cpu vm_stat_diff wasn't transferred into the global counter. vmstat_work which is responsible for the sync is defined as deferrable delayed work which means that the defined timeout doesn't wake up an idle CPU. A CPU might stay in an idle state for a long time and general effort is to keep such a CPU in this state as long as possible which might lead to all sorts of troubles for vmstat consumers as can be seen with the excessive direct reclaim throttling. This patch basically reverts 39bf6270f5 ("VM statistics: Make timer deferrable") but it shouldn't cause any problems for idle CPUs because only CPUs with an active per-cpu drift are woken up since 7cc36bbddd ("vmstat: on-demand vmstat workers v8") and CPUs which are idle for a longer time shouldn't have per-cpu drift. Fixes: 39bf6270f5 (VM statistics: Make timer deferrable) Signed-off-by: Michal Hocko <mhocko@suse.cz> Reported-by: Vinayak Menon <vinmenon@codeaurora.org> Acked-by: Christoph Lameter <cl@linux.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Vladimir Davydov <vdavydov@parallels.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Minchan Kim <minchan@kernel.org> Cc: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2015-02-11 17:06:07 -08:00
..
backing-dev.c	Merge branch 'for-3.18/core' of git://git.kernel.dk/linux-block	2014-10-18 11:53:51 -07:00
balloon_compaction.c	mm/balloon_compaction: fix deflation when compaction is disabled	2014-10-29 16:33:15 -07:00
bootmem.c	mem-hotplug: reset node managed pages when hot-adding a new pgdat	2014-11-13 16:17:06 -08:00
cleancache.c	mm: fix cleancache debugfs directory path	2015-01-20 14:08:31 +01:00
cma.c	mm: cma: fix totalcma_pages to include DT defined CMA regions	2015-02-11 17:06:03 -08:00
compaction.c	mm/compaction: add tracepoint to observe behaviour of compaction defer	2015-02-11 17:06:04 -08:00
debug-pagealloc.c	mm/debug-pagealloc: make debug-pagealloc boottime configurable	2014-12-13 12:42:48 -08:00
debug.c	mm: account pmd page tables to the process	2015-02-11 17:06:04 -08:00
dmapool.c	mm/dmapool.c: fixed a brace coding style issue	2014-10-09 22:26:00 -04:00
early_ioremap.c
fadvise.c	mm: fadvise: document the fadvise(FADV_DONTNEED) behaviour for partial pages	2014-12-13 12:42:49 -08:00
failslab.c
filemap.c	mm: drop vm_ops->remap_pages and generic_file_remap_pages() stub	2015-02-10 14:30:30 -08:00
filemap_xip.c	mm: drop vm_ops->remap_pages and generic_file_remap_pages() stub	2015-02-10 14:30:30 -08:00
frontswap.c	mm/frontswap.c: fix the condition in BUG_ON	2014-12-10 17:41:08 -08:00
gup.c	mm: gup: use get_user_pages_unlocked within get_user_pages_fast	2015-02-11 17:06:05 -08:00
highmem.c
huge_memory.c	mincore: apply page table walker on do_mincore()	2015-02-11 17:06:06 -08:00
hugetlb.c	mm: account pmd page tables to the process	2015-02-11 17:06:04 -08:00
hugetlb_cgroup.c	mm: page_counter: pull "-1" handling out of page_counter_memparse()	2015-02-11 17:06:02 -08:00
hwpoison-inject.c
init-mm.c
internal.h	mm: reduce try_to_compact_pages parameters	2015-02-11 17:06:02 -08:00
interval_tree.c	mm: replace vma->sharead.linear with vma->shared	2015-02-10 14:30:31 -08:00
iov_iter.c	copy_from_iter_nocache()	2014-12-08 20:25:23 -05:00
Kconfig	rcu: Make SRCU optional by using CONFIG_SRCU	2015-01-06 11:04:29 -08:00
Kconfig.debug	mm/debug_pagealloc: remove obsolete Kconfig options	2015-01-08 15:10:52 -08:00
kmemcheck.c	mm/slab_common: move kmem_cache definition to internal header	2014-10-09 22:25:50 -04:00
kmemleak-test.c
kmemleak.c
ksm.c	mm: remove rest usage of VM_NONLINEAR and pte_file()	2015-02-10 14:30:31 -08:00
list_lru.c
maccess.c
madvise.c	mm: remove rest usage of VM_NONLINEAR and pte_file()	2015-02-10 14:30:31 -08:00
Makefile	mm: replace remap_file_pages() syscall with emulation	2015-02-10 14:30:30 -08:00
memblock.c	mm/memblock.c: refactor functions to set/clear MEMBLOCK_HOTPLUG	2014-12-13 12:42:46 -08:00
memcontrol.c	memcg: cleanup preparation for page table walk	2015-02-11 17:06:06 -08:00
memory-failure.c	mm: vmscan: invoke slab shrinkers from shrink_zone()	2014-12-13 12:42:48 -08:00
memory.c	mm: account pmd page tables to the process	2015-02-11 17:06:04 -08:00
memory_hotplug.c	mm, memory_hotplug/failure: drain single zone pcplists	2014-12-10 17:41:05 -08:00
mempolicy.c	mm: pagewalk: fix misbehavior of walk_page_range for vma(VM_PFNMAP)	2015-02-11 17:06:06 -08:00
mempool.c
migrate.c	mm/hugetlb: take page table lock in follow_huge_pmd()	2015-02-11 17:06:01 -08:00
mincore.c	mincore: apply page table walker on do_mincore()	2015-02-11 17:06:06 -08:00
mlock.c	Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2014-10-13 15:44:12 +02:00
mm_init.c
mmap.c	mm: fix false-positive warning on exit due mm_nr_pmds(mm)	2015-02-11 17:06:04 -08:00
mmu_context.c
mmu_notifier.c	mmu_notifier: add the callback for mmu_notifier_invalidate_range()	2014-11-13 13:46:09 +11:00
mmzone.c	mm: microoptimize zonelist operations	2015-02-11 17:06:02 -08:00
mprotect.c	mm: remove rest usage of VM_NONLINEAR and pte_file()	2015-02-10 14:30:31 -08:00
mremap.c	mm: remove rest usage of VM_NONLINEAR and pte_file()	2015-02-10 14:30:31 -08:00
msync.c	mm: remove rest usage of VM_NONLINEAR and pte_file()	2015-02-10 14:30:31 -08:00
nobootmem.c	mem-hotplug: reset node managed pages when hot-adding a new pgdat	2014-11-13 16:17:06 -08:00
nommu.c	mm: gup: add __get_user_pages_unlocked to customize gup_flags	2015-02-11 17:06:05 -08:00
oom_kill.c	mm: account pmd page tables to the process	2015-02-11 17:06:04 -08:00
page-writeback.c	page_writeback: put account_page_redirty() after set_page_dirty()	2015-02-11 17:06:04 -08:00
page_alloc.c	mm: more aggressive page stealing for UNMOVABLE allocations	2015-02-11 17:06:06 -08:00
page_counter.c	mm: page_counter: pull "-1" handling out of page_counter_memparse()	2015-02-11 17:06:02 -08:00
page_ext.c	mm/page_owner: keep track of page owners	2014-12-13 12:42:48 -08:00
page_io.c
page_isolation.c	mm, page_isolation: drain single zone pcplists	2014-12-10 17:41:05 -08:00
page_owner.c	mm/page_owner: correct owner information for early allocated pages	2014-12-13 12:42:48 -08:00
pagewalk.c	mm: pagewalk: fix misbehavior of walk_page_range for vma(VM_PFNMAP)	2015-02-11 17:06:06 -08:00
percpu-km.c
percpu-vm.c
percpu.c	percpu: off by one in BUG_ON()	2014-10-29 10:34:34 -04:00
pgtable-generic.c
process_vm_access.c	mm: gup: use get_user_pages_unlocked	2015-02-11 17:06:05 -08:00
quicklist.c
readahead.c
rmap.c	mm: memcontrol: track move_lock state internally	2015-02-11 17:06:00 -08:00
shmem.c	swap: remove unused mem_cgroup_uncharge_swapcache declaration	2015-02-11 17:06:00 -08:00
slab.c	slab: fix cpuset check in fallback_alloc	2014-12-13 12:42:53 -08:00
slab.h	memcg: zap __memcg_{charge,uncharge}_slab	2015-02-10 14:30:34 -08:00
slab_common.c	memcg: zap memcg_slab_caches and memcg_slab_mutex	2015-02-10 14:30:34 -08:00
slob.c	mm/sl[ao]b: always track caller in kmalloc_(node_)track_caller()	2014-10-09 22:25:50 -04:00
slub.c	mm/slub.c: fix typo in comment	2015-02-10 14:30:30 -08:00
sparse-vmemmap.c
sparse.c
swap.c	rmap: drop support of non-linear mappings	2015-02-10 14:30:31 -08:00
swap_cgroup.c	mm: page_cgroup: rename file to mm/swap_cgroup.c	2014-12-10 17:41:09 -08:00
swap_state.c	mm: page_cgroup: rename file to mm/swap_cgroup.c	2014-12-10 17:41:09 -08:00
swapfile.c	mm: page_cgroup: rename file to mm/swap_cgroup.c	2014-12-10 17:41:09 -08:00
truncate.c	mm: Fix comment before truncate_setsize()	2014-11-07 08:29:25 +11:00
util.c	mm: gup: use get_user_pages_unlocked within get_user_pages_fast	2015-02-11 17:06:05 -08:00
vmacache.c	mm,vmacache: count number of system-wide flushes	2014-12-13 12:42:48 -08:00
vmalloc.c	mm/vmalloc.c: fix memory ordering bug	2014-12-13 12:42:49 -08:00
vmpressure.c	mm/vmpressure.c: fix race in vmpressure_work_fn()	2014-12-02 17:32:07 -08:00
vmscan.c	mm: memcontrol: default hierarchy interface for memory	2015-02-11 17:06:02 -08:00
vmstat.c	vmstat: do not use deferrable delayed work for vmstat_update	2015-02-11 17:06:07 -08:00
workingset.c
zbud.c	mm/zbud: init user ops only when it is needed	2014-12-13 12:42:51 -08:00
zpool.c
zsmalloc.c	mm/zsmalloc: adjust order of functions	2014-12-18 19:08:11 -08:00
zswap.c	mm/zswap: delete unnecessary check before calling free_percpu()	2014-12-13 12:42:50 -08:00