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SubjectRe: [PATCH 1/5] vmscan: remove all_unreclaimable check from direct reclaim path completely
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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