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linux-stable/mm
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Nadav Amit a9b802500e Revert "mm: numa: defer TLB flush for THP migration as long as possible" 
While deferring TLB flushes is a good practice, the reverted patch
caused pending TLB flushes to be checked while the page-table lock is
not taken.  As a result, in architectures with weak memory model (PPC),
Linux may miss a memory-barrier, miss the fact TLB flushes are pending,
and cause (in theory) a memory corruption.

Since the alternative of using smp_mb__after_unlock_lock() was
considered a bit open-coded, and the performance impact is expected to
be small, the previous patch is reverted.

This reverts b0943d61b8 ("mm: numa: defer TLB flush for THP migration
as long as possible").

Link: http://lkml.kernel.org/r/20170802000818.4760-4-namit@vmware.com
Signed-off-by: Nadav Amit <namit@vmware.com>
Suggested-by: Mel Gorman <mgorman@suse.de>
Acked-by: Mel Gorman <mgorman@suse.de>
Acked-by: Rik van Riel <riel@redhat.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Nadav Amit <nadav.amit@gmail.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-08-10 15:54:07 -07:00
..
kasan kasan: avoid -Wmaybe-uninitialized warning 2017-08-02 16:34:46 -07:00
backing-dev.c
balloon_compaction.c mm/balloon_compaction.c: enqueue zero page to balloon device 2017-07-10 16:32:32 -07:00
bootmem.c
cleancache.c fs: switch ->s_uuid to uuid_t 2017-06-05 16:59:12 +02:00
cma.c cma: fix calculation of aligned offset 2017-07-10 16:32:32 -07:00
cma.h
cma_debug.c
compaction.c mm, compaction: skip over holes in __reset_isolation_suitable 2017-07-06 16:24:32 -07:00
debug.c mm: migrate: prevent racy access to tlb_flush_pending 2017-08-10 15:54:07 -07:00
debug_page_ref.c
dmapool.c
early_ioremap.c
fadvise.c
failslab.c
filemap.c mm: hugetlb: return immediately for hugetlb page in __delete_from_page_cache() 2017-07-10 16:32:30 -07:00
frame_vector.c treewide: use kv[mz]alloc* rather than opencoded variants 2017-05-08 17:15:13 -07:00
frontswap.c
gup.c mm, gup: ensure real head page is ref-counted when using hugepages 2017-07-06 16:24:34 -07:00
highmem.c
huge_memory.c Revert "mm: numa: defer TLB flush for THP migration as long as possible" 2017-08-10 15:54:07 -07:00
hugetlb.c userfaultfd: hugetlbfs: remove superfluous page unlock in VM_SHARED case 2017-08-10 15:54:06 -07:00
hugetlb_cgroup.c
hwpoison-inject.c
init-mm.c
internal.h mm, mprotect: flush TLB if potentially racing with a parallel reclaim leaving stale TLB entries 2017-08-02 16:34:46 -07:00
interval_tree.c
Kconfig mm/kasan: add support for memory hotplug 2017-07-10 16:32:33 -07:00
Kconfig.debug
khugepaged.c mm: make PR_SET_THP_DISABLE immediately active 2017-07-10 16:32:31 -07:00
kmemcheck.c
kmemleak-test.c
kmemleak.c mm: kmemleak: treat vm_struct as alternative reference to vmalloc'ed objects 2017-07-06 16:24:34 -07:00
ksm.c ksm: optimize refile of stable_node_dup at the head of the chain 2017-07-06 16:24:31 -07:00
list_lru.c mm/list_lru.c: fix list_lru_count_node() to be race free 2017-07-10 16:32:33 -07:00
maccess.c
madvise.c mm, mprotect: flush TLB if potentially racing with a parallel reclaim leaving stale TLB entries 2017-08-02 16:34:46 -07:00
Makefile percpu: expose statistics about percpu memory via debugfs 2017-06-20 15:31:38 -04:00
memblock.c mm, memory_hotplug: move movable_node to the hotplug proper 2017-07-06 16:24:35 -07:00
memcontrol.c mm, memcg: fix potential undefined behavior in mem_cgroup_event_ratelimit() 2017-07-10 16:32:32 -07:00
memory-failure.c mm, hugetlb, soft_offline: use new_page_nodemask for soft offline migration 2017-07-10 16:32:32 -07:00
memory.c mm, mprotect: flush TLB if potentially racing with a parallel reclaim leaving stale TLB entries 2017-08-02 16:34:46 -07:00
memory_hotplug.c mm/memory-hotplug: switch locking to a percpu rwsem 2017-07-10 16:32:33 -07:00
mempolicy.c mm, migration: do not trigger OOM killer when migrating memory 2017-07-12 16:26:04 -07:00
mempool.c sched/wait: Rename wait_queue_t => wait_queue_entry_t 2017-06-20 12:18:27 +02:00
memtest.c
migrate.c Revert "mm: numa: defer TLB flush for THP migration as long as possible" 2017-08-10 15:54:07 -07:00
mincore.c
mlock.c mlock: fix mlock count can not decrease in race condition 2017-06-02 15:07:38 -07:00
mm_init.c
mmap.c mm: fix overflow check in expand_upwards() 2017-07-14 15:05:12 -07:00
mmu_context.c
mmu_notifier.c
mmzone.c
mprotect.c mm: migrate: prevent racy access to tlb_flush_pending 2017-08-10 15:54:07 -07:00
mremap.c userfaultfd: non-cooperative: notify about unmap of destination during mremap 2017-08-02 16:34:46 -07:00
msync.c
nobootmem.c mm/nobootmem.c: return 0 when start_pfn equals end_pfn 2017-07-06 16:24:31 -07:00
nommu.c mm, vmalloc: use __GFP_HIGHMEM implicitly 2017-05-08 17:15:13 -07:00
oom_kill.c mm/oom_kill.c: add tracepoints for oom reaper-related events 2017-07-10 16:32:32 -07:00
page-writeback.c writeback: rework wb_[dec|inc]_stat family of functions 2017-07-12 16:26:05 -07:00
page_alloc.c mm: ratelimit PFNs busy info message 2017-08-10 15:54:06 -07:00
page_counter.c
page_ext.c
page_idle.c
page_io.c mm/page_io.c: fix oops during block io poll in swapin path 2017-08-02 17:16:11 -07:00
page_isolation.c mm: unify new_node_page and alloc_migrate_target 2017-07-10 16:32:31 -07:00
page_owner.c mm: avoid taking zone lock in pagetypeinfo_showmixed() 2017-07-10 16:32:32 -07:00
page_poison.c
page_vma_mapped.c mm/hugetlb: add size parameter to huge_pte_offset() 2017-07-06 16:24:34 -07:00
pagewalk.c mm/hugetlb: add size parameter to huge_pte_offset() 2017-07-06 16:24:34 -07:00
percpu-internal.h percpu: fix early calls for spinlock in pcpu_stats 2017-06-21 13:53:52 -04:00
percpu-km.c percpu: fix static checker warnings in pcpu_destroy_chunk 2017-06-29 11:23:38 -04:00
percpu-stats.c percpu: expose statistics about percpu memory via debugfs 2017-06-20 15:31:38 -04:00
percpu-vm.c percpu: fix static checker warnings in pcpu_destroy_chunk 2017-06-29 11:23:38 -04:00
percpu.c percpu: resolve err may not be initialized in pcpu_alloc 2017-06-21 12:00:45 -04:00
pgtable-generic.c
process_vm_access.c
quicklist.c
readahead.c
rmap.c mm, mprotect: flush TLB if potentially racing with a parallel reclaim leaving stale TLB entries 2017-08-02 16:34:46 -07:00
rodata_test.c
shmem.c mm: make PR_SET_THP_DISABLE immediately active 2017-07-10 16:32:31 -07:00
slab.c mm: memcontrol: account slab stats per lruvec 2017-07-06 16:24:35 -07:00
slab.h mm: memcontrol: account slab stats per lruvec 2017-07-06 16:24:35 -07:00
slab_common.c mm: allow slab_nomerge to be set at build time 2017-07-06 16:24:31 -07:00
slob.c
slub.c mm: memcontrol: account slab stats per lruvec 2017-07-06 16:24:35 -07:00
sparse-vmemmap.c mm, tree wide: replace __GFP_REPEAT by __GFP_RETRY_MAYFAIL with more useful semantic 2017-07-12 16:26:03 -07:00
sparse.c mm, memory_hotplug: do not associate hotadded memory to zones until online 2017-07-06 16:24:32 -07:00
swap.c mm: swap: provide lru_add_drain_all_cpuslocked() 2017-07-10 16:32:33 -07:00
swap_cgroup.c mm, THP, swap: delay splitting THP during swap out 2017-07-06 16:24:31 -07:00
swap_slots.c mm/swap_slots.c: don't disable preemption while taking the per-CPU cache 2017-07-10 16:32:32 -07:00
swap_state.c swap: add block io poll in swapin path 2017-07-10 16:32:30 -07:00
swapfile.c swap: add block io poll in swapin path 2017-07-10 16:32:30 -07:00
truncate.c mm/truncate.c: fix THP handling in invalidate_mapping_pages() 2017-07-10 16:32:32 -07:00
usercopy.c
userfaultfd.c
util.c mm: fix global NR_SLAB_.*CLAIMABLE counter reads 2017-08-10 15:54:06 -07:00
vmacache.c
vmalloc.c mm, tree wide: replace __GFP_REPEAT by __GFP_RETRY_MAYFAIL with more useful semantic 2017-07-12 16:26:03 -07:00
vmpressure.c mm, vmpressure: pass-through notification support 2017-07-10 16:32:31 -07:00
vmscan.c mm, tree wide: replace __GFP_REPEAT by __GFP_RETRY_MAYFAIL with more useful semantic 2017-07-12 16:26:03 -07:00
vmstat.c mm: avoid taking zone lock in pagetypeinfo_showmixed() 2017-07-10 16:32:32 -07:00
workingset.c mm: memcontrol: per-lruvec stats infrastructure 2017-07-06 16:24:35 -07:00
z3fold.c
zbud.c
zpool.c
zsmalloc.c zram: do not free pool->size_class 2017-08-02 16:34:47 -07:00
zswap.c mm/zswap.c: delete an error message for a failed memory allocation in zswap_dstmem_prepare() 2017-07-06 16:24:35 -07:00