Robin Holt cb53237513 mm/ksm.c is doing an unneeded _notify in write_protect_page. ... ksm.c's write_protect_page implements a lockless means of verifying a page does not have any users of the page which are not accounted for via other kernel tracking means. It does this by removing the writable pte with TLB flushes, checking the page_count against the total known users, and then using set_pte_at_notify to make it a read-only entry. An unneeded mmu_notifier callout is made in the case where the known users does not match the page_count. In that event, we are inserting the identical pte and there is no need for the set_pte_at_notify, but rather the simpler set_pte_at suffices. Signed-off-by: Robin Holt <holt@sgi.com> Acked-by: Izik Eidus <ieidus@redhat.com> Acked-by: Andrea Arcangeli <aarcange@redhat.com> Acked-by: Hugh Dickins <hugh.dickins@tiscali.co.uk> Cc: Chris Wright <chrisw@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2010-03-24 16:31:20 -07:00
..
Kconfig	Merge branch 'x86-bootmem-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-03-03 08:15:05 -08:00
Kconfig.debug	trivial: improve help text for mm debug config options	2009-09-21 15:14:57 +02:00
Makefile	make generic_acl slightly more generic	2009-12-16 12:16:49 -05:00
backing-dev.c	flusher: Fix PF_FROZEN race	2009-12-03 13:49:43 +01:00
bootmem.c	x86: Make 64 bit use early_res instead of bootmem before slab	2010-02-12 09:41:59 -08:00
bounce.c	block: remove some includings of blktrace_api.h	2009-06-16 11:19:36 +02:00
debug-pagealloc.c	generic debug pagealloc	2009-04-01 08:59:13 -07:00
dmapool.c	dmapools: protect page_list walk in show_pools()	2009-06-30 18:56:00 -07:00
fadvise.c	readahead: introduce FMODE_RANDOM for POSIX_FADV_RANDOM	2010-03-06 11:26:25 -08:00
failslab.c	failslab: add ability to filter slab caches	2010-02-26 19:19:39 +02:00
filemap.c	mm: use rlimit helpers	2010-03-06 11:26:24 -08:00
filemap_xip.c	mm: clean up mm_counter	2010-03-06 11:26:23 -08:00
fremap.c	mm: clean up mm_counter	2010-03-06 11:26:23 -08:00
highmem.c	grammar fix in comment	2010-02-05 12:22:40 +01:00
hugetlb.c	Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm	2010-03-01 09:15:15 -08:00
hwpoison-inject.c	HWPOISON: Don't do early filtering if filter is disabled	2009-12-16 12:20:01 +01:00
init-mm.c	mm: consolidate init_mm definition	2009-06-16 19:47:28 -07:00
internal.h	HWPOISON: add an interface to switch off/on all the page filters	2009-12-16 12:19:59 +01:00
kmemcheck.c	kmemcheck: add hooks for the page allocator	2009-06-15 15:48:33 +02:00
kmemleak-test.c	percpu: clean up percpu variable definitions	2009-06-24 15:13:48 +09:00
kmemleak.c	Merge branch 'kmemleak' of git://linux-arm.org/linux-2.6	2009-12-17 16:00:19 -08:00
ksm.c	mm/ksm.c is doing an unneeded _notify in write_protect_page.	2010-03-24 16:31:20 -07:00
maccess.c	maccess,probe_kernel: Allow arch specific override probe_kernel_(read|write)	2010-01-07 11:58:36 -06:00
madvise.c	HWPOISON: Add a madvise() injector for soft page offlining	2009-12-16 12:20:00 +01:00
memcontrol.c	memcontrol: fix potential null deref	2010-03-24 16:31:19 -07:00
memory-failure.c	mm: change anon_vma linking to fix multi-process server scalability issue	2010-03-06 11:26:26 -08:00
memory.c	mm: introduce dump_page() and print symbolic flag names	2010-03-12 15:52:28 -08:00
memory_hotplug.c	mm: introduce dump_page() and print symbolic flag names	2010-03-12 15:52:28 -08:00
mempolicy.c	Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-03-13 14:43:01 -08:00
mempool.c	mm: remove broken 'kzalloc' mempool	2009-09-22 07:17:35 -07:00
migrate.c	mm/migrate.c: kill anon local variable from migrate_page_copy	2010-03-06 11:26:25 -08:00
mincore.c	mm: hugetlb: fix hugepage memory leak in mincore()	2009-12-15 08:53:24 -08:00
mlock.c	mm: use rlimit helpers	2010-03-06 11:26:24 -08:00
mm_init.c	mm: mminit_loglevel cannot be __meminitdata anymore	2008-08-20 15:40:30 -07:00
mmap.c	Add generic sys_old_mmap()	2010-03-12 15:52:32 -08:00
mmu_context.c	mm: export use_mm/unuse_mm to modules	2010-01-15 01:43:28 -08:00
mmu_notifier.c	ksm: add mmu_notifier set_pte_at_notify()	2009-09-22 07:17:31 -07:00
mmzone.c	[ARM] Double check memmap is actually valid with a memmap has unexpected holes V2	2009-05-18 11:22:24 +01:00
mprotect.c	perf: Do the big rename: Performance Counters -> Performance Events	2009-09-21 14:28:04 +02:00
mremap.c	mm: change anon_vma linking to fix multi-process server scalability issue	2010-03-06 11:26:26 -08:00
msync.c	[CVE-2009-0029] System call wrappers part 13	2009-01-14 14:15:23 +01:00
nommu.c	nommu: fix an incorrect comment in the do_mmap_shared_file()	2010-03-24 16:31:20 -07:00
oom_kill.c	memcg: fix oom kill behavior	2010-03-12 15:52:38 -08:00
page-writeback.c	writeback: remove unused nonblocking and congestion checks	2009-12-03 13:54:25 +01:00
page_alloc.c	mm: introduce dump_page() and print symbolic flag names	2010-03-12 15:52:28 -08:00
page_cgroup.c	memcg: avoid use cmpxchg in swap cgroup maintainance	2010-03-17 18:43:47 -07:00
page_io.c	swap: rework map_swap_page() again	2009-12-15 08:53:16 -08:00
page_isolation.c	memory hotplug: fix page_zone() calculation in test_pages_isolated()	2008-11-06 15:41:19 -08:00
pagewalk.c	mm hugetlb: add hugepage support to pagemap	2009-12-15 08:53:24 -08:00
percpu.c	early_res: Add free_early_partial()	2010-02-26 08:25:35 +01:00
prio_tree.c	spelling fixes: mm/	2007-10-20 01:27:18 +02:00
quicklist.c	cpumask: use new-style cpumask ops in mm/quicklist.	2009-09-24 09:34:52 +09:30
readahead.c	readahead: introduce FMODE_RANDOM for POSIX_FADV_RANDOM	2010-03-06 11:26:25 -08:00
rmap.c	vmscan: detect mapped file pages used only once	2010-03-06 11:26:27 -08:00
shmem.c	Fix breakage in shmem.c	2009-12-16 19:48:48 -05:00
slab.c	Merge branches 'slab/cleanups', 'slab/failslab', 'slab/fixes' and 'slub/percpu' into slab-for-linus	2010-03-04 12:07:50 +02:00
slob.c	slab: remove duplicate kmem_cache_init_late() declarations	2009-08-06 11:36:25 +03:00
slub.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2010-03-12 16:04:50 -08:00
sparse-vmemmap.c	sparsemem: Put mem map for one node together.	2010-02-12 09:42:38 -08:00
sparse.c	sparsemem: Fix compilation on PowerPC	2010-03-01 17:59:24 -08:00
swap.c	mm: remove free_hot_page()	2010-03-06 11:26:25 -08:00
swap_state.c	mm: add_to_swap_cache() does not return -EEXIST	2009-09-22 07:17:35 -07:00
swapfile.c	memcg: move charges of anonymous swap	2010-03-12 15:52:36 -08:00
thrash.c	mm: pass mm to grab_swap_token	2009-06-23 12:50:05 -07:00
truncate.c	vfs: Fix vmtruncate() regression	2010-01-13 16:09:33 -08:00
util.c	nommu: don't need get_unmapped_area() for NOMMU	2010-01-16 12:15:40 -08:00
vmalloc.c	mm: purge fragmented percpu vmap blocks	2010-02-02 12:50:47 -08:00
vmscan.c	vmscan: detect mapped file pages used only once	2010-03-06 11:26:27 -08:00
vmstat.c	mm: restore zone->all_unreclaimable to independence word	2010-03-06 11:26:25 -08:00