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Message-ID: <4C7C6959.3030801@redhat.com> Date: Mon, 30 Aug 2010 22:30:49 -0400 From: Rik van Riel <riel@...hat.com> To: Minchan Kim <minchan.kim@...il.com> CC: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>, Ying Han <yinghan@...gle.com>, Andrew Morton <akpm@...ux-foundation.org>, linux-mm <linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org>, Venkatesh Pallipadi <venki@...gle.com>, Johannes Weiner <hannes@...xchg.org> Subject: Re: [PATCH] vmscan: prevent background aging of anon page in no swap system On 08/30/2010 09:23 PM, Minchan Kim wrote: > Ying's one and mine both has a same effect. > Only difference happens swap is full. My version maintains old > behavior but Ying's one changes the behavior. I admit swap full is > rare event but I hoped not changed old behavior if we doesn't find any > problem. > If kswapd does aging when swap full happens, is it a problem? It may be a good thing, since swap will often be freed again (when something is swapped in, or exits). Having some more anonymous pages sit on the inactive list gives them a chance to get used again, potentially giving us a better chance of preserving the working set when swap is full or near full a lot of the time. -- All rights reversed -- 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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