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Date: Mon, 13 Jun 2011 10:04:11 +0900 From: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> To: minchan.kim@...il.com CC: akpm@...ux-foundation.org, linux-mm@...ck.org, linux-kernel@...r.kernel.org, mgorman@...e.de, aarcange@...hat.com, riel@...hat.com, hannes@...xchg.org, kamezawa.hiroyu@...fujitsu.com Subject: Re: [PATCH v3 05/10] vmscan: make isolate_lru_page with filter aware (2011/06/07 23:38), Minchan Kim wrote: > In __zone_reclaim case, we don't want to shrink mapped page. > Nonetheless, we have isolated mapped page and re-add it into > LRU's head. It's unnecessary CPU overhead and makes LRU churning. > > Of course, when we isolate the page, the page might be mapped but > when we try to migrate the page, the page would be not mapped. > So it could be migrated. But race is rare and although it happens, > it's no big deal. > > Cc: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> > Cc: Mel Gorman <mgorman@...e.de> > Cc: Rik van Riel <riel@...hat.com> > Cc: Andrea Arcangeli <aarcange@...hat.com> > Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> > Acked-by: Johannes Weiner <hannes@...xchg.org> > Signed-off-by: Minchan Kim <minchan.kim@...il.com> Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> -- 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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