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| author | Mel Gorman | 2013-07-09 01:00:25 +0200 |
|---|---|---|
| committer | Linus Torvalds | 2013-07-09 19:33:23 +0200 |
| commit | 918fc718c5922520c499ad60f61b8df86b998ae9 (patch) | |
| tree | 71c492881b0bcadcdd1a35e63f09cb6df59c86cd /mm/mmap.c | |
| parent | mm: vmscan: do not continue scanning if reclaim was aborted for compaction (diff) | |
| download | kernel-qcow2-linux-918fc718c5922520c499ad60f61b8df86b998ae9.tar.gz kernel-qcow2-linux-918fc718c5922520c499ad60f61b8df86b998ae9.tar.xz kernel-qcow2-linux-918fc718c5922520c499ad60f61b8df86b998ae9.zip | |
mm: vmscan: do not scale writeback pages when deciding whether to set ZONE_WRITEBACK
After the patch "mm: vmscan: Flatten kswapd priority loop" was merged
the scanning priority of kswapd changed.
The priority now rises until it is scanning enough pages to meet the
high watermark. shrink_inactive_list sets ZONE_WRITEBACK if a number of
pages were encountered under writeback but this value is scaled based on
the priority. As kswapd frequently scans with a higher priority now it
is relatively easy to set ZONE_WRITEBACK. This patch removes the
scaling and treates writeback pages similar to how it treats unqueued
dirty pages and congested pages. The user-visible effect should be that
kswapd will writeback fewer pages from reclaim context.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/mmap.c')
0 files changed, 0 insertions, 0 deletions