Kirill A. Shutemov b97731992d rmap: introduce rmap_walk_locked() ... This patchset rewrites freeze_page() and unfreeze_page() using try_to_unmap() and remove_migration_ptes(). Result is much simpler, but somewhat slower. Migration 8GiB worth of PMD-mapped THP: Baseline 20.21 +/- 0.393 Patched 20.73 +/- 0.082 Slowdown 1.03x It's 3% slower, comparing to 14% in v1. I don't it should be a stopper. Splitting of PTE-mapped pages slowed more. But this is not a common case. Migration 8GiB worth of PMD-mapped THP: Baseline 20.39 +/- 0.225 Patched 22.43 +/- 0.496 Slowdown 1.10x rmap_walk_locked() is the same as rmap_walk(), but the caller takes care of the relevant rmap lock. This is preparation for switching THP splitting from custom rmap walk in freeze_page()/unfreeze_page() to the generic one. There is no support for KSM pages for now: not clear which lock is implied. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2016-03-17 15:09:34 -07:00
..
kasan	mm: coalesce split strings	2016-03-17 15:09:34 -07:00
backing-dev.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
balloon_compaction.c	virtio_balloon: fix race between migration and ballooning	2016-01-12 20:47:06 +02:00
bootmem.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
cleancache.c	cleancache: constify cleancache_ops structure	2016-01-27 09:09:57 -05:00
cma_debug.c
cma.c
cma.h
compaction.c	mm, kswapd: replace kswapd compaction with waking up kcompactd	2016-03-17 15:09:34 -07:00
debug_page_ref.c	mm/page_ref: add tracepoint to track down page reference manipulation	2016-03-17 15:09:34 -07:00
debug.c	mm: introduce page reference manipulation functions	2016-03-17 15:09:34 -07:00
dmapool.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
early_ioremap.c
fadvise.c
failslab.c	mm: fault-inject take over bootstrap kmem_cache check	2016-03-15 16:55:16 -07:00
filemap.c	mm: remove unnecessary uses of lock_page_memcg()	2016-03-15 16:55:16 -07:00
frame_vector.c
frontswap.c
gup.c	mm: retire GUP WARN_ON_ONCE that outlived its usefulness	2016-02-03 08:57:14 -08:00
highmem.c
huge_memory.c	mm: coalesce split strings	2016-03-17 15:09:34 -07:00
hugetlb_cgroup.c
hugetlb.c	mm: convert pr_warning to pr_warn	2016-03-17 15:09:34 -07:00
hwpoison-inject.c
init-mm.c
internal.h	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
interval_tree.c
Kconfig	mm: ZONE_DEVICE depends on SPARSEMEM_VMEMMAP	2016-03-17 15:09:34 -07:00
Kconfig.debug	mm/page_ref: add tracepoint to track down page reference manipulation	2016-03-17 15:09:34 -07:00
kmemcheck.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
kmemleak-test.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
kmemleak.c	mm: coalesce split strings	2016-03-17 15:09:34 -07:00
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/madvise: update comment on sys_madvise()	2016-03-15 16:55:16 -07:00
Makefile	mm/page_ref: add tracepoint to track down page reference manipulation	2016-03-17 15:09:34 -07:00
memblock.c	mm: coalesce split strings	2016-03-17 15:09:34 -07:00
memcontrol.c	mm: memcontrol: cleanup css_reset callback	2016-03-17 15:09:34 -07:00
memory_hotplug.c	mm: coalesce split strings	2016-03-17 15:09:34 -07:00
memory-failure.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
memory.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
mempolicy.c	mm: coalesce split strings	2016-03-17 15:09:34 -07:00
mempool.c	mm, mempool: only set __GFP_NOMEMALLOC if there are free elements	2016-03-17 15:09:34 -07:00
memtest.c
migrate.c	mm: introduce page reference manipulation functions	2016-03-17 15:09:34 -07:00
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	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
mmap.c	mm: coalesce split strings	2016-03-17 15:09:34 -07:00
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: check for pmd_none() after split_huge_pmd()	2016-02-11 18:35:48 -08:00
mremap.c	mm: cleanup *pte_alloc* interfaces	2016-03-17 15:09:34 -07:00
msync.c
nobootmem.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
nommu.c	mm: deduplicate memory overcommitment code	2016-03-17 15:09:34 -07:00
oom_kill.c	mm: coalesce split strings	2016-03-17 15:09:34 -07:00
page_alloc.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
page_counter.c
page_ext.c	mm/page_poisoning.c: allow for zero poisoning	2016-03-15 16:55:16 -07:00
page_idle.c	mm: add page_check_address_transhuge() helper	2016-01-15 17:56:32 -08:00
page_io.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
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	mm: coalesce split strings	2016-03-17 15:09:34 -07:00
page_poison.c	mm/page_poisoning.c: allow for zero poisoning	2016-03-15 16:55:16 -07:00
page-writeback.c	mm: remove unnecessary uses of lock_page_memcg()	2016-03-15 16:55:16 -07:00
pagewalk.c	thp: rename split_huge_page_pmd() to split_huge_pmd()	2016-01-15 17:56:32 -08:00
percpu-km.c	mm: percpu: use pr_fmt to prefix output	2016-03-17 15:09:34 -07:00
percpu-vm.c
percpu.c	mm: percpu: use pr_fmt to prefix output	2016-03-17 15:09:34 -07:00
pgtable-generic.c	mm/thp/migration: switch from flush_tlb_range to flush_pmd_tlb_range	2016-03-17 15:09:34 -07:00
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	rmap: introduce rmap_walk_locked()	2016-03-17 15:09:34 -07:00
shmem.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
slab_common.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
slab.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
slab.h	mm: memcontrol: report slab usage in cgroup2 memory.stat	2016-03-17 15:09:34 -07:00
slob.c	mm: slab: free kmem_cache_node after destroy sysfs file	2016-02-18 16:23:24 -08:00
slub.c	mm: coalesce split strings	2016-03-17 15:09:34 -07:00
sparse-vmemmap.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
sparse.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
swap_cgroup.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
swap_state.c	mm: memcontrol: charge swap to cgroup2	2016-01-20 17:09:18 -08:00
swap.c	mm, x86: get_user_pages() for dax mappings	2016-01-15 17:56:32 -08:00
swapfile.c	mm: coalesce split strings	2016-03-17 15:09:34 -07:00
truncate.c	mm: remove unnecessary uses of lock_page_memcg()	2016-03-15 16:55:16 -07:00
userfaultfd.c	mm: cleanup *pte_alloc* interfaces	2016-03-17 15:09:34 -07:00
util.c	mm: deduplicate memory overcommitment code	2016-03-17 15:09:34 -07:00
vmacache.c
vmalloc.c	mm: coalesce split strings	2016-03-17 15:09:34 -07:00
vmpressure.c	mm/vmpressure.c: fix subtree pressure detection	2016-02-03 08:28:43 -08:00
vmscan.c	mm: introduce page reference manipulation functions	2016-03-17 15:09:34 -07:00
vmstat.c	thp, vmstats: count deferred split events	2016-03-17 15:09:34 -07:00
workingset.c	mm: workingset: make shadow node shrinker memcg aware	2016-03-17 15:09:34 -07:00
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	mm/zswap: change incorrect strncmp use to strcmp	2015-12-18 14:25:40 -08:00