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Date: Wed, 20 May 2009 00:55:22 +0900 From: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> To: Rik van Riel <riel@...hat.com> Cc: Wu Fengguang <fengguang.wu@...el.com>, Christoph Lameter <cl@...ux-foundation.org>, Andrew Morton <akpm@...ux-foundation.org>, LKML <linux-kernel@...r.kernel.org>, Elladan <elladan@...imo.com>, Nick Piggin <npiggin@...e.de>, Johannes Weiner <hannes@...xchg.org>, Peter Zijlstra <peterz@...radead.org>, "tytso@....edu" <tytso@....edu>, "linux-mm@...ck.org" <linux-mm@...ck.org>, "minchan.kim@...il.com" <minchan.kim@...il.com> Subject: Re: [PATCH 2/3] vmscan: make mapped executable pages the first class citizen >> Another (amazing) finding of the test is, only around 1/10 mapped pages >> are actively referenced in the absence of user activities. >> >> Shall we protect the remaining 9/10 inactive ones? This is a question ;-) > > I believe we already do, due to the active list not being > scanned if none of the streaming IO pages get promoted to > the active list. his workload is, lseek(0) read(110 * 4096) lseek(100 * 4096) read(110 * 4096) lseek(200 * 4096) read(110 * 4096) .... IOW, 90% pages move into inactive list, 10% (overlapped readed) pages move into active list. he think it is file server simulation. I don't know it is good simulation or not. -- 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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