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Wanpeng Li 0be35096a1 mm/hwpoison: don't set migration type twice to avoid holding heavily contend zone->lock 
Set pageblock migration type will hold zone->lock which is heavy contended
in system to avoid race.  However, soft offline page will set pageblock
migration type twice during get page if the page is in used, not hugetlbfs
page and not on lru list.  There is unnecessary to set the pageblock
migration type and hold heavy contended zone->lock again if the first
round get page have already set the pageblock to right migration type.

The trick here is migration type is MIGRATE_ISOLATE.  There are other two
parts can change MIGRATE_ISOLATE except hwpoison.  One is memory hoplug,
however, we hold lock_memory_hotplug() which avoid race.  The second is
CMA which umovable page allocation requst can't fallback to.  So it's safe
here.

Signed-off-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Tony Luck <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2013-09-11 15:58:09 -07:00
..
Kconfig Merge remote-tracking branch 'origin/next' into kvm-ppc-next 2013-08-29 00:41:59 +02:00
Kconfig.debug
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Makefile zswap: add to mm/ 2013-07-10 18:11:34 -07:00
backing-dev.c mm/backing-dev.c: check user buffer length before copying data to the related user buffer 2013-09-11 15:58:03 -07:00
balloon_compaction.c
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bootmem.c mm: kill free_all_bootmem_node() 2013-07-03 16:07:39 -07:00
bounce.c
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cleancache.c
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compaction.c mm: compaction: do not compact pgdat for order-0 2013-09-11 15:57:55 -07:00
debug-pagealloc.c
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dmapool.c
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fadvise.c
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failslab.c
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filemap.c direct-io: Handle O_(D)SYNC AIO 2013-09-04 09:23:46 -04:00
filemap_xip.c
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fremap.c mm: save soft-dirty bits on file pages 2013-08-13 17:57:48 -07:00
frontswap.c
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highmem.c
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huge_memory.c mm/huge_memory.c: fix potential NULL pointer dereference 2013-09-11 15:57:19 -07:00
hugetlb.c mm: prepare to remove /proc/sys/vm/hugepages_treat_as_movable 2013-09-11 15:57:49 -07:00
hugetlb_cgroup.c cgroup: pass around cgroup_subsys_state instead of cgroup in file methods 2013-08-08 20:11:24 -04:00
hwpoison-inject.c
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init-mm.c
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internal.h mm: vmscan: fix do_try_to_free_pages() livelock 2013-09-11 15:58:01 -07:00
interval_tree.c
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kmemcheck.c
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kmemleak-test.c
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kmemleak.c mm: replace strict_strtoul() with kstrtoul() 2013-09-11 15:57:11 -07:00
ksm.c mm: replace strict_strtoul() with kstrtoul() 2013-09-11 15:57:11 -07:00
maccess.c
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madvise.c mm/madvise.c: fix coding-style errors 2013-09-11 15:57:00 -07:00
memblock.c memblock, numa: binary search node id 2013-09-11 15:57:51 -07:00
memcontrol.c kmemcg: don't allocate extra memory for root memcg_cache_params 2013-09-11 15:57:53 -07:00
memory-failure.c mm/hwpoison: don't set migration type twice to avoid holding heavily contend zone->lock 2013-09-11 15:58:09 -07:00
memory.c mm: migrate: add hugepage migration code to move_pages() 2013-09-11 15:57:48 -07:00
memory_hotplug.c mm: memory-hotplug: enable memory hotplug to handle hugepage 2013-09-11 15:57:48 -07:00
mempolicy.c mbind: add BUG_ON(!vma) in new_vma_page() 2013-09-11 15:57:50 -07:00
mempool.c
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migrate.c mm: vmscan: fix do_try_to_free_pages() livelock 2013-09-11 15:58:01 -07:00
mincore.c
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mlock.c mm: munlock: manual pte walk in fast path instead of follow_page_mask() 2013-09-11 15:58:01 -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: track vma changes with VM_SOFTDIRTY bit 2013-09-11 15:57:56 -07:00
mmu_context.c
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mmu_notifier.c treewide: relase -> release 2013-06-28 14:34:33 +02:00
mmzone.c
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mprotect.c
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mremap.c mm/mremap.c: call pud_free() after fail calling pmd_alloc() 2013-09-11 15:58:03 -07:00
msync.c
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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 mm/oom_kill: remove weird use of ERR_PTR()/PTR_ERR(). 2013-07-15 11:25:05 +09:30
page-writeback.c mm/page-writeback.c: add strictlimit feature 2013-09-11 15:58:04 -07:00
page_alloc.c mm: correct the comment about the value for buddy _mapcount 2013-09-11 15:58:06 -07:00
page_cgroup.c
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page_io.c mm: remove compressed copy from zram in-memory 2013-07-03 16:07:26 -07:00
page_isolation.c mm: memory-hotplug: enable memory hotplug to handle hugepage 2013-09-11 15:57:48 -07:00
pagewalk.c
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percpu-km.c
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percpu-vm.c
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percpu.c
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pgtable-generic.c mm: move pgtable related functions to right place 2013-09-11 15:57:30 -07:00
process_vm_access.c
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quicklist.c
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readahead.c readahead: make context readahead more conservative 2013-09-11 15:57:39 -07:00
rmap.c s390/mm: implement software referenced bits 2013-08-29 13:20:11 +02:00
shmem.c shm_mnt is as longterm as it gets, TYVM... 2013-09-03 22:50:27 -04:00
slab.c kernel: delete __cpuinit usage from all core kernel files 2013-07-14 19:36:59 -04:00
slab.h memcg: check that kmem_cache has memcg_params before accessing it 2013-08-28 19:26:38 -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
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 mm: replace strict_strtoul() with kstrtoul() 2013-09-11 15:57:11 -07:00
sparse-vmemmap.c
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sparse.c mm/sparse: introduce alloc_usemap_and_memmap 2013-09-11 15:58:01 -07:00
swap.c mm: fix aio performance regression for database caused by THP 2013-09-11 15:57:55 -07:00
swap_state.c
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swapfile.c swap: make cluster allocation per-cpu 2013-09-11 15:57:17 -07:00
truncate.c
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util.c swap: clean-up #ifdef in page_mapping() 2013-09-11 15:57:31 -07:00
vmalloc.c mm/vmalloc: use wrapper function get_vm_area_size to caculate size of vm area 2013-09-11 15:58:02 -07:00
vmpressure.c Merge branch 'for-3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup 2013-09-03 18:25:03 -07:00
vmscan.c mm: vmscan: fix do_try_to_free_pages() livelock 2013-09-11 15:58:01 -07:00
vmstat.c mm: vmscan: fix do_try_to_free_pages() livelock 2013-09-11 15:58:01 -07:00
zbud.c mm/zbud: fix some trivial typos in comments 2013-09-11 15:57:35 -07:00
zswap.c mm/zswap.c: get swapper address_space by using macro 2013-09-11 15:57:08 -07:00