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[PATCH] zoned vm counters: convert nr_mapped to per zone counter

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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).

[[email protected]: bugfix]
Signed-off-by: Christoph Lameter <[email protected]>
Cc: Trond Myklebust <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Christoph Lameter 2006-06-30 01:55:34 -07:00 • committed by Linus Torvalds
commit 65ba55f500
10 changed files with 16 additions and 17 deletions
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2
fs/proc/proc_misc.c
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@ -190,7 +190,7 @@ static int meminfo_read_proc(char *page, char **start, off_t off,
K(i.freeswap),
K(ps.nr_dirty),
K(ps.nr_writeback),
K(ps.nr_mapped),
K(global_page_state(NR_FILE_MAPPED)),
K(ps.nr_slab),
K(allowed),
K(committed),