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 |
---|---|---|
Kconfig | -rw-r--r-- | 21.0 KB |
Makefile | -rw-r--r-- | 1.8 KB |
nls_ascii.c | -rw-r--r-- | 5.7 KB |
nls_base.c | -rw-r--r-- | 15.1 KB |
nls_cp1250.c | -rw-r--r-- | 15.1 KB |
nls_cp1251.c | -rw-r--r-- | 12.5 KB |
nls_cp1255.c | -rw-r--r-- | 17.0 KB |
nls_cp437.c | -rw-r--r-- | 17.1 KB |
nls_cp737.c | -rw-r--r-- | 15.2 KB |
nls_cp775.c | -rw-r--r-- | 13.3 KB |
nls_cp850.c | -rw-r--r-- | 13.1 KB |
nls_cp852.c | -rw-r--r-- | 14.5 KB |
nls_cp855.c | -rw-r--r-- | 12.1 KB |
nls_cp857.c | -rw-r--r-- | 12.4 KB |
nls_cp860.c | -rw-r--r-- | 15.8 KB |
nls_cp861.c | -rw-r--r-- | 17.1 KB |
nls_cp862.c | -rw-r--r-- | 19.0 KB |
nls_cp863.c | -rw-r--r-- | 16.8 KB |
nls_cp864.c | -rw-r--r-- | 18.6 KB |
nls_cp865.c | -rw-r--r-- | 17.1 KB |
nls_cp866.c | -rw-r--r-- | 12.4 KB |
nls_cp869.c | -rw-r--r-- | 13.1 KB |
nls_cp874.c | -rw-r--r-- | 10.7 KB |
nls_cp932.c | -rw-r--r-- | 479.7 KB |
nls_cp936.c | -rw-r--r-- | 682.0 KB |
nls_cp949.c | -rw-r--r-- | 854.8 KB |
nls_cp950.c | -rw-r--r-- | 580.0 KB |
nls_euc-jp.c | -rw-r--r-- | 23.9 KB |
nls_iso8859-1.c | -rw-r--r-- | 10.0 KB |
nls_iso8859-13.c | -rw-r--r-- | 11.5 KB |
nls_iso8859-14.c | -rw-r--r-- | 14.5 KB |
nls_iso8859-15.c | -rw-r--r-- | 12.6 KB |
nls_iso8859-2.c | -rw-r--r-- | 12.9 KB |
nls_iso8859-3.c | -rw-r--r-- | 12.9 KB |
nls_iso8859-4.c | -rw-r--r-- | 12.9 KB |
nls_iso8859-5.c | -rw-r--r-- | 10.7 KB |
nls_iso8859-6.c | -rw-r--r-- | 10.2 KB |
nls_iso8859-7.c | -rw-r--r-- | 13.2 KB |
nls_iso8859-9.c | -rw-r--r-- | 10.8 KB |
nls_koi8-r.c | -rw-r--r-- | 13.5 KB |
nls_koi8-ru.c | -rw-r--r-- | 1.7 KB |
nls_koi8-u.c | -rw-r--r-- | 13.9 KB |
nls_utf8.c | -rw-r--r-- | 1.2 KB |
![swh spinner](/static/img/swh-spinner.gif)
Computing file changes ...