Messages in this thread | | | Date | Thu, 11 Aug 2011 18:10:29 +0900 | From | KAMEZAWA Hiroyuki <> | Subject | Re: [PATCH 5/7] mm: vmscan: Do not writeback filesystem pages in kswapd except in high priority |
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On Wed, 10 Aug 2011 11:47:18 +0100 Mel Gorman <mgorman@suse.de> wrote:
> It is preferable that no dirty pages are dispatched for cleaning from > the page reclaim path. At normal priorities, this patch prevents kswapd > writing pages. > > However, page reclaim does have a requirement that pages be freed > in a particular zone. If it is failing to make sufficient progress > (reclaiming < SWAP_CLUSTER_MAX at any priority priority), the priority > is raised to scan more pages. A priority of DEF_PRIORITY - 3 is > considered to be the point where kswapd is getting into trouble > reclaiming pages. If this priority is reached, kswapd will dispatch > pages for writing. > > Signed-off-by: Mel Gorman <mgorman@suse.de> > Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
BTW, I'd like to see summary of the effect of priority..
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