Christoph Lameter 587198ba52 vmstat: Remove BUG_ON from vmstat_update ... If we detect that there is nothing to do just set the flag and do not check if it was already set before. Races really do not matter. If the flag is set by any code then the shepherd will start dealing with the situation and reenable the vmstat workers when necessary again. Since commit 0eb77e9880 ("vmstat: make vmstat_updater deferrable again and shut down on idle") quiet_vmstat might update cpu_stat_off and mark a particular cpu to be handled by vmstat_shepherd. This might trigger a VM_BUG_ON in vmstat_update because the work item might have been sleeping during the idle period and see the cpu_stat_off updated after the wake up. The VM_BUG_ON is therefore misleading and no more appropriate. Moreover it doesn't really suite any protection from real bugs because vmstat_shepherd will simply reschedule the vmstat_work anytime it sees a particular cpu set or vmstat_update would do the same from the worker context directly. Even when the two would race the result wouldn't be incorrect as the counters update is fully idempotent. Reported-by: Sasha Levin <sasha.levin@oracle.com> Signed-off-by: Christoph Lameter <cl@linux.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2016-01-24 08:55:52 -08:00
..
kasan	UBSAN: run-time undefined behavior sanity checker	2016-01-20 17:09:18 -08:00
Kconfig	mm: re-enable THP	2016-01-15 17:56:32 -08:00
Kconfig.debug	…
Makefile	…
backing-dev.c	mm: memcontrol: export root_mem_cgroup	2016-01-14 16:00:49 -08:00
balloon_compaction.c	virtio_balloon: fix race between migration and ballooning	2016-01-12 20:47:06 +02:00
bootmem.c	…
cleancache.c	…
cma.c	…
cma.h	…
cma_debug.c	…
compaction.c	mm/compaction.c: __compact_pgdat() code cleanuup	2016-01-14 16:00:49 -08:00
debug-pagealloc.c	…
debug.c	mm: rework mapcount accounting to enable 4k mapping of THPs	2016-01-15 17:56:32 -08:00
dmapool.c	…
early_ioremap.c	…
fadvise.c	…
failslab.c	…
filemap.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2016-01-23 12:24:56 -08:00
frame_vector.c	…
frontswap.c	…
gup.c	mm: bring in additional flag for fixup_user_fault to signal unlock	2016-01-15 17:56:32 -08:00
highmem.c	…
huge_memory.c	mm: fix kernel crash in khugepaged thread	2016-01-21 17:20:51 -08:00
hugetlb.c	mm: rework mapcount accounting to enable 4k mapping of THPs	2016-01-15 17:56:32 -08:00
hugetlb_cgroup.c	…
hwpoison-inject.c	…
init-mm.c	…
internal.h	thp: reintroduce split_huge_page()	2016-01-15 17:56:32 -08:00
interval_tree.c	…
kmemcheck.c	…
kmemleak-test.c	…
kmemleak.c	Revert "gfp: add __GFP_NOACCOUNT"	2016-01-14 16:00:49 -08:00
ksm.c	mm/ksm.c: mark stable page dirty	2016-01-15 17:56:32 -08:00
list_lru.c	mm: memcontrol: move kmem accounting code to CONFIG_MEMCG	2016-01-20 17:09:18 -08:00
maccess.c	…
madvise.c	mm/huge_memory.c: don't split THP page when MADV_FREE syscall is called	2016-01-15 17:56:32 -08:00
memblock.c	mm/memblock: introduce for_each_memblock_type()	2016-01-14 16:00:49 -08:00
memcontrol.c	thp: change pmd_trans_huge_lock() interface to return ptl	2016-01-21 17:20:51 -08:00
memory-failure.c	mm: soft-offline: exit with failure for non anonymous thp	2016-01-15 17:56:32 -08:00
memory.c	mm: free swap cache aggressively if memcg swap is full	2016-01-20 17:09:18 -08:00
memory_hotplug.c	x86, mm: introduce vmem_altmap to augment vmemmap_populate()	2016-01-15 17:56:32 -08:00
mempolicy.c	mm: mempolicy: skip non-migratable VMAs when setting MPOL_MF_LAZY	2016-01-15 17:56:32 -08:00
mempool.c	…
memtest.c	…
migrate.c	thp: introduce deferred_split_huge_page()	2016-01-15 17:56:32 -08:00
mincore.c	thp: change pmd_trans_huge_lock() interface to return ptl	2016-01-21 17:20:51 -08:00
mlock.c	mm: fix mlock accouting	2016-01-21 17:20:51 -08:00
mm_init.c	…
mmap.c	mm: fix locking order in mm_take_all_locks()	2016-01-15 17:56:32 -08:00
mmu_context.c	…
mmu_notifier.c	…
mmzone.c	mm/mmzone.c: memmap_valid_within() can be boolean	2016-01-14 16:00:49 -08:00
mprotect.c	mm, dax: dax-pmd vs thp-pmd vs hugetlbfs-pmd	2016-01-15 17:56:32 -08:00
mremap.c	mm, thp: remove infrastructure for handling splitting PMDs	2016-01-15 17:56:32 -08:00
msync.c	…
nobootmem.c	…
nommu.c	kmemcg: account certain kmem allocations to memcg	2016-01-14 16:00:49 -08:00
oom_kill.c	mm, shmem: add internal shmem resident memory accounting	2016-01-14 16:00:49 -08:00
page-writeback.c	mm: page_alloc: generalize the dirty balance reserve	2016-01-14 16:00:49 -08:00
page_alloc.c	mm/page_alloc.c: remove unused struct zone *z variable	2016-01-15 17:56:32 -08:00
page_counter.c	…
page_ext.c	…
page_idle.c	mm: add page_check_address_transhuge() helper	2016-01-15 17:56:32 -08:00
page_io.c	…
page_isolation.c	mm/page_isolation: do some cleanup in "undo_isolate_page_range"	2016-01-15 17:56:32 -08:00
page_owner.c	…
pagewalk.c	thp: rename split_huge_page_pmd() to split_huge_pmd()	2016-01-15 17:56:32 -08:00
percpu-km.c	…
percpu-vm.c	…
percpu.c	tree wide: use kvfree() than conditional kfree()/vfree()	2016-01-22 17:02:18 -08:00
pgtable-generic.c	mm, dax: dax-pmd vs thp-pmd vs hugetlbfs-pmd	2016-01-15 17:56:32 -08:00
process_vm_access.c	ptrace: use fsuid, fsgid, effective creds for fs access checks	2016-01-20 17:09:18 -08:00
quicklist.c	…
readahead.c	mm: move lru_to_page to mm_inline.h	2016-01-14 16:00:49 -08:00
rmap.c	mm: fix locking order in mm_take_all_locks()	2016-01-15 17:56:32 -08:00
shmem.c	make sure that freeing shmem fast symlinks is RCU-delayed	2016-01-22 18:08:52 -05:00
slab.c	mm/slab.c: add a helper function get_first_slab	2016-01-14 16:00:49 -08:00
slab.h	mm: memcontrol: move kmem accounting code to CONFIG_MEMCG	2016-01-20 17:09:18 -08:00
slab_common.c	mm: memcontrol: move kmem accounting code to CONFIG_MEMCG	2016-01-20 17:09:18 -08:00
slob.c	…
slub.c	mm: memcontrol: move kmem accounting code to CONFIG_MEMCG	2016-01-20 17:09:18 -08:00
sparse-vmemmap.c	x86, mm: introduce vmem_altmap to augment vmemmap_populate()	2016-01-15 17:56:32 -08:00
sparse.c	x86, mm: introduce vmem_altmap to augment vmemmap_populate()	2016-01-15 17:56:32 -08:00
swap.c	mm, x86: get_user_pages() for dax mappings	2016-01-15 17:56:32 -08:00
swap_cgroup.c	…
swap_state.c	mm: memcontrol: charge swap to cgroup2	2016-01-20 17:09:18 -08:00
swapfile.c	wrappers for ->i_mutex access	2016-01-22 18:04:28 -05:00
truncate.c	dax: support dirty DAX entries in radix tree	2016-01-22 17:02:18 -08:00
userfaultfd.c	memcg: adjust to support new THP refcounting	2016-01-15 17:56:32 -08:00
util.c	proc read mm's {arg,env}_{start,end} with mmap semaphore taken.	2016-01-20 17:09:18 -08:00
vmacache.c	…
vmalloc.c	mm/vmalloc.c: use macro IS_ALIGNED to judge the aligment	2016-01-15 17:56:32 -08:00
vmpressure.c	mm: memcontrol: rein in the CONFIG space madness	2016-01-20 17:09:18 -08:00
vmscan.c	dax: support dirty DAX entries in radix tree	2016-01-22 17:02:18 -08:00
vmstat.c	vmstat: Remove BUG_ON from vmstat_update	2016-01-24 08:55:52 -08:00
workingset.c	dax: support dirty DAX entries in radix tree	2016-01-22 17:02:18 -08:00
zbud.c	mm/zbud.c: use list_last_entry() instead of list_tail_entry()	2016-01-15 11:40:52 -08:00
zpool.c	…
zsmalloc.c	zsmalloc: fix migrate_zspage-zs_free race condition	2016-01-20 17:09:18 -08:00
zswap.c	…