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| author | Christoph Lameter <clameter@sgi.com> | 2006-06-30 01:55:34 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-30 11:25:34 -0700 |
| commit | 65ba55f500a37272985d071c9bbb35256a2f7c14 (patch) | |
| tree | e7735326ef2d2dca9d00a6c5ae47e9eb03c7834f /mm/rmap.c | |
| parent | 2244b95a7bcf8d24196f8a3a44187ba5dfff754c (diff) | |
| download | linux-stable-65ba55f500a37272985d071c9bbb35256a2f7c14.tar.gz linux-stable-65ba55f500a37272985d071c9bbb35256a2f7c14.tar.bz2 linux-stable-65ba55f500a37272985d071c9bbb35256a2f7c14.zip | |
[PATCH] zoned vm counters: convert nr_mapped to per zone counter
nr_mapped is important because it allows a determination of how many pages of
a zone are not mapped, which would allow a more efficient means of determining
when we need to reclaim memory in a zone.
We take the nr_mapped field out of the page state structure and define a new
per zone counter named NR_FILE_MAPPED (the anonymous pages will be split off
from NR_MAPPED in the next patch).
We replace the use of nr_mapped in various kernel locations. This avoids the
looping over all processors in try_to_free_pages(), writeback, reclaim (swap +
zone reclaim).
[akpm@osdl.org: bugfix]
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/rmap.c')
| -rw-r--r-- | mm/rmap.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/mm/rmap.c b/mm/rmap.c index e76909e880ca..af5e9808e65d 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -455,7 +455,7 @@ static void __page_set_anon_rmap(struct page *page, * nr_mapped state can be updated without turning off * interrupts because it is not modified via interrupt. */ - __inc_page_state(nr_mapped); + __inc_zone_page_state(page, NR_FILE_MAPPED); } /** @@ -499,7 +499,7 @@ void page_add_new_anon_rmap(struct page *page, void page_add_file_rmap(struct page *page) { if (atomic_inc_and_test(&page->_mapcount)) - __inc_page_state(nr_mapped); + __inc_zone_page_state(page, NR_FILE_MAPPED); } /** @@ -531,7 +531,7 @@ void page_remove_rmap(struct page *page) */ if (page_test_and_clear_dirty(page)) set_page_dirty(page); - __dec_page_state(nr_mapped); + __dec_zone_page_state(page, NR_FILE_MAPPED); } } |