redonkable/remarkable-linux
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remarkable-linux/mm
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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
..
backing-dev.c
bootmem.c x86: Make 64 bit use early_res instead of bootmem before slab 2010-02-12 09:41:59 -08:00
bounce.c
debug-pagealloc.c
dmapool.c
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
init-mm.c
internal.h
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
kmemcheck.c
kmemleak-test.c
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
Makefile make generic_acl slightly more generic 2009-12-16 12:16:49 -05:00
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
migrate.c mm/migrate.c: kill anon local variable from migrate_page_copy 2010-03-06 11:26:25 -08:00
mincore.c
mlock.c mm: use rlimit helpers 2010-03-06 11:26:24 -08:00
mm_init.c
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
mmzone.c
mprotect.c
mremap.c mm: change anon_vma linking to fix multi-process server scalability issue 2010-03-06 11:26:26 -08:00
msync.c
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
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
page_isolation.c
pagewalk.c
percpu.c early_res: Add free_early_partial() 2010-02-26 08:25:35 +01:00
prio_tree.c
quicklist.c
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
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
swapfile.c memcg: move charges of anonymous swap 2010-03-12 15:52:36 -08:00
thrash.c
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