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Date: Fri, 9 Jul 2010 09:02:31 -0500 (CDT) From: Christoph Lameter <cl@...ux-foundation.org> To: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> cc: Andrew Morton <akpm@...ux-foundation.org>, LKML <linux-kernel@...r.kernel.org>, linux-mm <linux-mm@...ck.org>, Mel Gorman <mel@....ul.ie>, Rik van Riel <riel@...hat.com>, Minchan Kim <minchan.kim@...il.com>, Johannes Weiner <hannes@...xchg.org> Subject: Re: [PATCH] vmscan: stop meaningless loop iteration when no reclaimable slab On Fri, 9 Jul 2010, KOSAKI Motohiro wrote: > If number of reclaimable slabs are zero, shrink_icache_memory() and > shrink_dcache_memory() return 0. but strangely shrink_slab() ignore > it and continue meaningless loop iteration. There is also a per zone/node/global counter SLAB_RECLAIM_ACCOUNT that could be used to determine if its worth looking at things at all. I saw some effort going into making the shrinkers zone aware. If so then we may be able to avoid scanning slabs. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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