Messages in this thread | | | Date | Wed, 23 Mar 2011 19:21:50 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH 1/5] vmscan: remove all_unreclaimable check from direct reclaim path completely |
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On Thu, 24 Mar 2011 11:11:46 +0900 (JST) KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> wrote:
> Subject: [PATCH] vmscan: remove all_unreclaimable check from direct reclaim path completely
zone.all_unreclaimable is there to prevent reclaim from wasting CPU cycles scanning a zone which has no reclaimable pages. When originally implemented it did this very well.
That you guys keep breaking it, or don't feel like improving it is not a reason to remove it!
If the code is unneeded and the kernel now reliably solves this problem by other means then this should have been fully explained in the changelog, but it was not even mentioned.
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