Wei Wang af54aed94b mm/balloon_compaction.c: don't zero ballooned pages ... Revert commit bb01b64cfa ("mm/balloon_compaction.c: enqueue zero page to balloon device")' Zeroing ballon pages is rather time consuming, especially when a lot of pages are in flight. E.g. 7GB worth of ballooned memory takes 2.8s with __GFP_ZERO while it takes ~491ms without it. The original commit argued that zeroing will help ksmd to merge these pages on the host but this argument is assuming that the host actually marks balloon pages for ksm which is not universally true. So we pay performance penalty for something that even might not be used in the end which is wrong. The host can zero out pages on its own when there is a need. [mhocko@kernel.org: new changelog text] Link: http://lkml.kernel.org/r/1501761557-9758-1-git-send-email-wei.w.wang@intel.com Fixes: bb01b64cfa ("mm/balloon_compaction.c: enqueue zero page to balloon device") Signed-off-by: Wei Wang <wei.w.wang@intel.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: zhenwei.pi <zhenwei.pi@youruncloud.com> Cc: David Hildenbrand <david@redhat.com> 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: don't zero ballooned pages	2017-08-10 15:54:07 -07:00
bootmem.c
cleancache.c	fs: switch ->s_uuid to uuid_t	2017-06-05 16:59:12 +02:00
cma_debug.c
cma.c	cma: fix calculation of aligned offset	2017-07-10 16:32:32 -07:00
cma.h
compaction.c	mm, compaction: skip over holes in __reset_isolation_suitable	2017-07-06 16:24:32 -07:00
debug_page_ref.c
debug.c	mm: make tlb_flush_pending global	2017-08-10 15:54:07 -07:00
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
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_cgroup.c
hugetlb.c	userfaultfd: hugetlbfs: remove superfluous page unlock in VM_SHARED case	2017-08-10 15:54:06 -07:00
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	mm: fix KSM data corruption	2017-08-10 15:54:07 -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_hotplug.c	mm/memory-hotplug: switch locking to a percpu rwsem	2017-07-10 16:32:33 -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: fix MADV_[FREE|DONTNEED] TLB flush miss problem	2017-08-10 15:54:07 -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
oom_kill.c	mm/oom_kill.c: add tracepoints for oom reaper-related events	2017-07-10 16:32:32 -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
page-writeback.c	writeback: rework wb_[dec|inc]_stat family of functions	2017-07-12 16:26:05 -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_common.c	mm: allow slab_nomerge to be set at build time	2017-07-06 16:24:31 -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
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_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
swap.c	mm: swap: provide lru_add_drain_all_cpuslocked()	2017-07-10 16:32:33 -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