Minchan Kim 5a88381384 memory-hotplug: fix zone stat mismatch ... During memory-hotplug, I found NR_ISOLATED_[ANON|FILE] are increasing, causing the kernel to hang. When the system doesn't have enough free pages, it enters reclaim but never reclaim any pages due to too_many_isolated()==true and loops forever. The cause is that when we do memory-hotadd after memory-remove, __zone_pcp_update() clears a zone's ZONE_STAT_ITEMS in setup_pageset() although the vm_stat_diff of all CPUs still have values. In addtion, when we offline all pages of the zone, we reset them in zone_pcp_reset without draining so we loss some zone stat item. Reviewed-by: Wen Congyang <wency@cn.fujitsu.com> Signed-off-by: Minchan Kim <minchan@kernel.org> Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2012-10-09 16:22:59 +09:00
..
backing-dev.c
bootmem.c	mm: fix-up zone present pages	2012-10-09 16:22:54 +09:00
bounce.c
cleancache.c
compaction.c	mm: compaction: clear PG_migrate_skip based on compaction and reclaim activity	2012-10-09 16:22:51 +09:00
debug-pagealloc.c
dmapool.c
fadvise.c
failslab.c
filemap_xip.c	mm: move all mmu notifier invocations to be done outside the PT lock	2012-10-09 16:22:58 +09:00
filemap.c	readahead: fault retry breaks mmap file read random detection	2012-10-09 16:22:47 +09:00
fremap.c	mm: replace vma prio_tree with an interval tree	2012-10-09 16:22:39 +09:00
frontswap.c
highmem.c
huge_memory.c	mm: move all mmu notifier invocations to be done outside the PT lock	2012-10-09 16:22:58 +09:00
hugetlb_cgroup.c
hugetlb.c	mm: move all mmu notifier invocations to be done outside the PT lock	2012-10-09 16:22:58 +09:00
hwpoison-inject.c
init-mm.c
internal.h	mm: use clear_page_mlock() in page_remove_rmap()	2012-10-09 16:22:56 +09:00
interval_tree.c	mm: add CONFIG_DEBUG_VM_RB build option	2012-10-09 16:22:42 +09:00
Kconfig	mm: enable CONFIG_COMPACTION by default	2012-10-09 16:22:53 +09:00
Kconfig.debug
kmemcheck.c
kmemleak-test.c
kmemleak.c	kmemleak: use rbtree instead of prio tree	2012-10-09 16:22:39 +09:00
ksm.c	mm: wrap calls to set_pte_at_notify with invalidate_range_start and invalidate_range_end	2012-10-09 16:22:58 +09:00
maccess.c
madvise.c	mm: prepare VM_DONTDUMP for using in drivers	2012-10-09 16:22:18 +09:00
Makefile	mm: replace vma prio_tree with an interval tree	2012-10-09 16:22:39 +09:00
memblock.c	mm/memblock: use existing interface to set nid	2012-10-09 16:22:47 +09:00
memcontrol.c	memcg: move mem_cgroup_is_root upwards	2012-10-09 16:22:55 +09:00
memory_hotplug.c	mm: fix-up zone present pages	2012-10-09 16:22:54 +09:00
memory-failure.c	mm anon rmap: replace same_anon_vma linked list with an interval tree.	2012-10-09 16:22:41 +09:00
memory.c	mm: wrap calls to set_pte_at_notify with invalidate_range_start and invalidate_range_end	2012-10-09 16:22:58 +09:00
mempolicy.c	mm: revert 0def08e3 ("mm/mempolicy.c: check return code of check_range")	2012-10-09 16:22:58 +09:00
mempool.c
migrate.c
mincore.c
mlock.c	mm: use clear_page_mlock() in page_remove_rmap()	2012-10-09 16:22:56 +09:00
mm_init.c
mmap.c	mm: avoid taking rmap locks in move_ptes()	2012-10-09 16:22:42 +09:00
mmu_context.c
mmu_notifier.c	mm: wrap calls to set_pte_at_notify with invalidate_range_start and invalidate_range_end	2012-10-09 16:22:58 +09:00
mmzone.c
mprotect.c
mremap.c	mm: move all mmu notifier invocations to be done outside the PT lock	2012-10-09 16:22:58 +09:00
msync.c
nobootmem.c	mm: fix-up zone present pages	2012-10-09 16:22:54 +09:00
nommu.c	mm: replace vma prio_tree with an interval tree	2012-10-09 16:22:39 +09:00
oom_kill.c	oom: remove deprecated oom_adj	2012-10-09 16:22:24 +09:00
page_alloc.c	memory-hotplug: fix zone stat mismatch	2012-10-09 16:22:59 +09:00
page_cgroup.c
page_io.c
page_isolation.c	mm/page_alloc: refactor out __alloc_contig_migrate_alloc()	2012-10-09 16:22:52 +09:00
page-writeback.c
pagewalk.c
percpu-km.c
percpu-vm.c
percpu.c
pgtable-generic.c	thp: introduce pmdp_invalidate()	2012-10-09 16:22:29 +09:00
process_vm_access.c
quicklist.c
readahead.c
rmap.c	mm: move all mmu notifier invocations to be done outside the PT lock	2012-10-09 16:22:58 +09:00
shmem.c	mm: kill vma flag VM_CAN_NONLINEAR	2012-10-09 16:22:17 +09:00
slab_common.c
slab.c	Merge branch 'slab/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux	2012-10-07 07:53:13 +09:00
slab.h
slob.c
slub.c
sparse-vmemmap.c
sparse.c
swap_state.c
swap.c	mm: remove vma arg from page_evictable	2012-10-09 16:22:55 +09:00
swapfile.c
truncate.c	mm: use clear_page_mlock() in page_remove_rmap()	2012-10-09 16:22:56 +09:00
util.c
vmalloc.c	mm: kill vma flag VM_RESERVED and mm->reserved_vm counter	2012-10-09 16:22:19 +09:00
vmscan.c	mm: remove vma arg from page_evictable	2012-10-09 16:22:55 +09:00
vmstat.c	memory-hotplug: fix zone stat mismatch	2012-10-09 16:22:59 +09:00