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Date: Wed, 15 May 2013 16:12:20 +0900 From: Minchan Kim <minchan@...nel.org> To: Rik van Riel <riel@...hat.com> Cc: Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org, linux-kernel@...r.kernel.org, Mel Gorman <mgorman@...e.de>, Johannes Weiner <hannes@...xchg.org>, Kamezawa Hiroyuki <kamezawa.hiroyu@...fujitsu.com>, Michal Hocko <mhocko@...e.cz>, Hugh Dickins <hughd@...gle.com> Subject: Re: [RFC 4/4] mm: free reclaimed pages instantly without depending next reclaim Hey Rik, On Tue, May 14, 2013 at 01:32:33PM -0400, Rik van Riel wrote: > On 05/12/2013 10:10 PM, Minchan Kim wrote: > >Normally, file I/O for reclaiming is asynchronous so that > >when page writeback is completed, reclaimed page will be > >rotated into LRU tail for fast reclaiming in next turn. > >But it makes unnecessary CPU overhead and more iteration with higher > >priority of reclaim could reclaim too many pages than needed > >pages. > > > >This patch frees reclaimed pages by paging out instantly without > >rotating back them into LRU's tail when the I/O is completed so > >that we can get out of reclaim loop as soon as poosbile and avoid > >unnecessary CPU overhead for moving them. > > > >Signed-off-by: Minchan Kim <minchan@...nel.org> > > I like this approach and am looking forward to your v2 series, > with the reworked patch 3/4. I will do it after I finish more urgent works. :) I am looking forward to seeing your review, then. Thanks for the interest. -- Kind regards, Minchan Kim -- 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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