Naoya Horiguchi 025c5b2451 thp: optimize away unnecessary page table locking ... Currently when we check if we can handle thp as it is or we need to split it into regular sized pages, we hold page table lock prior to check whether a given pmd is mapping thp or not. Because of this, when it's not "huge pmd" we suffer from unnecessary lock/unlock overhead. To remove it, this patch introduces a optimized check function and replace several similar logics with it. [akpm@linux-foundation.org: checkpatch fixes] Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: David Rientjes <rientjes@google.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Wu Fengguang <fengguang.wu@intel.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Jiri Slaby <jslaby@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2012-03-21 17:54:57 -07:00
..
backing-dev.c	backing-dev: fix wakeup timer races with bdi_unregister()	2012-02-01 16:52:49 +08:00
bootmem.c
bounce.c	mm: remove the second argument of k[un]map_atomic()	2012-03-20 21:48:27 +08:00
cleancache.c
compaction.c	mm: compaction: make compact_control order signed	2012-03-21 17:54:56 -07:00
debug-pagealloc.c
dmapool.c
fadvise.c
failslab.c
filemap.c	mm: remove the second argument of k[un]map_atomic()	2012-03-20 21:48:27 +08:00
filemap_xip.c	mm/filemap_xip.c: fix race condition in xip_file_fault()	2012-02-03 16:16:41 -08:00
fremap.c
highmem.c
huge_memory.c	thp: optimize away unnecessary page table locking	2012-03-21 17:54:57 -07:00
hugetlb.c	flush_tlb_range() needs ->page_table_lock when ->mmap_sem is not held	2012-03-05 13:51:32 -08:00
hwpoison-inject.c
init-mm.c
internal.h
Kconfig
Kconfig.debug
kmemcheck.c
kmemleak-test.c
kmemleak.c	kmemleak: Disable early logging when kmemleak is off by default	2012-01-20 16:57:05 +00:00
ksm.c	mm: remove the second argument of k[un]map_atomic()	2012-03-20 21:48:27 +08:00
maccess.c
madvise.c
Makefile
memblock.c	memblock: Fix size aligning of memblock_alloc_base_nid()	2012-03-01 10:53:18 +01:00
memcontrol.c	mm: thp: fix pmd_bad() triggering in code paths holding mmap_sem read mode	2012-03-21 17:54:54 -07:00
memory-failure.c	mm: compaction: introduce sync-light migration for use by compaction	2012-01-12 20:13:09 -08:00
memory.c	mm: make get_mm_counter static-inline	2012-03-21 17:54:55 -07:00
memory_hotplug.c	mm: compaction: introduce sync-light migration for use by compaction	2012-01-12 20:13:09 -08:00
mempolicy.c	mm: thp: fix pmd_bad() triggering in code paths holding mmap_sem read mode	2012-03-21 17:54:54 -07:00
mempool.c
migrate.c	memcg: fix GPF when cgroup removal races with last exit	2012-03-05 15:49:43 -08:00
mincore.c	mm: thp: fix pmd_bad() triggering in code paths holding mmap_sem read mode	2012-03-21 17:54:54 -07:00
mlock.c	vm: avoid using find_vma_prev() unnecessarily	2012-03-06 18:23:36 -08:00
mm_init.c
mmap.c	mm: search from free_area_cache for the bigger size	2012-03-21 17:54:56 -07:00
mmu_context.c
mmu_notifier.c
mmzone.c
mprotect.c	vm: avoid using find_vma_prev() unnecessarily	2012-03-06 18:23:36 -08:00
mremap.c
msync.c
nobootmem.c
nommu.c	NOMMU: Don't need to clear vm_mm when deleting a VMA	2012-02-24 08:59:04 -08:00
oom_kill.c	mm, oom: introduce independent oom killer ratelimit state	2012-03-21 17:54:55 -07:00
page-writeback.c	Merge branch 'writeback-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux	2012-01-10 16:59:59 -08:00
page_alloc.c	vmscan: only defer compaction for failed order and higher	2012-03-21 17:54:56 -07:00
page_cgroup.c	page_cgroup: fix horrid swap accounting regression	2012-03-06 08:18:23 -08:00
page_io.c
page_isolation.c
pagewalk.c	mm: thp: fix pmd_bad() triggering in code paths holding mmap_sem read mode	2012-03-21 17:54:54 -07:00
percpu-km.c
percpu-vm.c	percpu: use bitmap_clear	2012-01-20 09:23:16 -08:00
percpu.c	Kmemleak patches	2012-01-14 18:11:11 -08:00
pgtable-generic.c
prio_tree.c
process_vm_access.c	Fix race in process_vm_rw_core	2012-02-02 12:55:17 -08:00
quicklist.c
readahead.c
rmap.c	mm: unify remaining mem_cont, mem, etc. variable names to memcg	2012-01-12 20:13:06 -08:00
shmem.c	mm: remove the second argument of k[un]map_atomic()	2012-03-20 21:48:27 +08:00
slab.c	Merge branch 'slab/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux	2012-01-11 18:52:23 -08:00
slob.c
slub.c	mm,x86,um: move CMPXCHG_DOUBLE config option	2012-01-12 20:13:03 -08:00
sparse-vmemmap.c
sparse.c
swap.c	memcg: fix GPF when cgroup removal races with last exit	2012-03-05 15:49:43 -08:00
swap_state.c	mm: make swapin readahead skip over holes	2012-03-21 17:54:56 -07:00
swapfile.c	mm: make swapin readahead skip over holes	2012-03-21 17:54:56 -07:00
thrash.c
truncate.c	mm: fix comment typo of truncate_inode_pages_range	2012-02-23 11:52:19 +01:00
util.c
vmalloc.c	mm: remove the second argument of k[un]map_atomic()	2012-03-20 21:48:27 +08:00
vmscan.c	vmscan: only defer compaction for failed order and higher	2012-03-21 17:54:56 -07:00
vmstat.c	mm,x86,um: move CMPXCHG_LOCAL config option	2012-01-12 20:13:03 -08:00