https://github.com/torvalds/linux
Revision e8a03feb54ca7f1768bbdc2b491f9ef654e6d01d authored by Rik van Riel on 14 April 2010, 21:59:28 UTC, committed by Linus Torvalds on 19 April 2010, 23:28:20 UTC
The recent anon_vma fixes cause many anonymous pages to end up in the parent process anon_vma, even when the page is exclusively owned by the current process. Adding exclusively owned anonymous pages to the top anon_vma reduces rmap scanning overhead, especially in workloads with forking servers. This patch adds a parameter to __page_set_anon_rmap that can be used to indicate whether or not the added page is exclusively owned by the current process. Pages added through page_add_new_anon_rmap are exclusively owned by the current process, and can be added to the top anon_vma. Pages added through page_add_anon_rmap can be either shared or exclusively owned, so we do the conservative thing and add it to the oldest anon_vma. A next step would be to add the exclusive parameter to page_add_anon_rmap, to be used from functions where we do know for sure whether a page is exclusively owned. Signed-off-by: Rik van Riel <riel@redhat.com> Reviewed-by: Johannes Weiner <hannes@cmpxchg.org> Lightly-tested-by: Borislav Petkov <bp@alien8.de> Reviewed-by: Minchan Kim <minchan.kim@gmail.com> [ Edited to look nicer - Linus ] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent 9b030e2
Tip revision: e8a03feb54ca7f1768bbdc2b491f9ef654e6d01d authored by Rik van Riel on 14 April 2010, 21:59:28 UTC
rmap: add exclusively owned pages to the newest anon_vma
rmap: add exclusively owned pages to the newest anon_vma
Tip revision: e8a03fe
File | Mode | Size |
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Kconfig | -rw-r--r-- | 2.1 KB |
Makefile | -rw-r--r-- | 374 bytes |
budget.c | -rw-r--r-- | 23.7 KB |
commit.c | -rw-r--r-- | 18.7 KB |
compress.c | -rw-r--r-- | 6.6 KB |
debug.c | -rw-r--r-- | 72.1 KB |
debug.h | -rw-r--r-- | 17.9 KB |
dir.c | -rw-r--r-- | 33.3 KB |
file.c | -rw-r--r-- | 44.6 KB |
find.c | -rw-r--r-- | 29.8 KB |
gc.c | -rw-r--r-- | 26.7 KB |
io.c | -rw-r--r-- | 26.6 KB |
ioctl.c | -rw-r--r-- | 5.2 KB |
journal.c | -rw-r--r-- | 41.7 KB |
key.h | -rw-r--r-- | 14.1 KB |
log.c | -rw-r--r-- | 20.3 KB |
lprops.c | -rw-r--r-- | 36.2 KB |
lpt.c | -rw-r--r-- | 58.7 KB |
lpt_commit.c | -rw-r--r-- | 50.4 KB |
master.c | -rw-r--r-- | 10.4 KB |
misc.h | -rw-r--r-- | 9.0 KB |
orphan.c | -rw-r--r-- | 24.8 KB |
recovery.c | -rw-r--r-- | 37.9 KB |
replay.c | -rw-r--r-- | 28.0 KB |
sb.c | -rw-r--r-- | 19.0 KB |
scan.c | -rw-r--r-- | 9.4 KB |
shrinker.c | -rw-r--r-- | 9.3 KB |
super.c | -rw-r--r-- | 58.1 KB |
tnc.c | -rw-r--r-- | 87.0 KB |
tnc_commit.c | -rw-r--r-- | 27.1 KB |
tnc_misc.c | -rw-r--r-- | 12.6 KB |
ubifs-media.h | -rw-r--r-- | 22.8 KB |
ubifs.h | -rw-r--r-- | 59.0 KB |
xattr.c | -rw-r--r-- | 15.5 KB |
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