diff options
| author | Christoph Lameter <clameter@sgi.com> | 2006-06-30 12:55:34 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-30 22:25:34 +0400 |
| commit | 65ba55f500a37272985d071c9bbb35256a2f7c14 (patch) | |
| tree | e7735326ef2d2dca9d00a6c5ae47e9eb03c7834f /mm/page-writeback.c | |
| parent | 2244b95a7bcf8d24196f8a3a44187ba5dfff754c (diff) | |
| download | linux-65ba55f500a37272985d071c9bbb35256a2f7c14.tar.xz | |
[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/page-writeback.c')
| -rw-r--r-- | mm/page-writeback.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/page-writeback.c b/mm/page-writeback.c index 4ec7026c7bab..60c7244c42e4 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -111,7 +111,7 @@ static void get_writeback_state(struct writeback_state *wbs) { wbs->nr_dirty = read_page_state(nr_dirty); wbs->nr_unstable = read_page_state(nr_unstable); - wbs->nr_mapped = read_page_state(nr_mapped); + wbs->nr_mapped = global_page_state(NR_FILE_MAPPED); wbs->nr_writeback = read_page_state(nr_writeback); } |