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| author |   Mel Gorman <mgorman@techsingularity.net> | 2016-07-28 15:46:53 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2016-07-28 16:07:41 -0700 |
| commit | 3b8c0be43cb844b3cd26fac00e7663a1201176fd (patch) | |
| tree | 398947f7f2b165b9a891f176ea19bec84f269224 /tools/perf/scripts/python/syscall-counts-by-pid.py | |
| parent | mm, page_alloc: remove fair zone allocation policy (diff) | |
| download | linux-dev-3b8c0be43cb844b3cd26fac00e7663a1201176fd.tar.xz linux-dev-3b8c0be43cb844b3cd26fac00e7663a1201176fd.zip | |
mm: page_alloc: cache the last node whose dirty limit is reached
If a page is about to be dirtied then the page allocator attempts to
limit the total number of dirty pages that exists in any given zone.
The call to node_dirty_ok is expensive so this patch records if the last
pgdat examined hit the dirty limits. In some cases, this reduces the
number of calls to node_dirty_ok().
Link: http://lkml.kernel.org/r/1467970510-21195-31-git-send-email-mgorman@techsingularity.net
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Hillf Danton <hillf.zj@alibaba-inc.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Rik van Riel <riel@surriel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts-by-pid.py')
0 files changed, 0 insertions, 0 deletions