linux-kernel - Re: [PATCH] mm: evict streaming IO cache first

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Message-ID: <Pine.LNX.4.64.0811162126550.17921@blonde.site>
Date:	Sun, 16 Nov 2008 21:28:08 +0000 (GMT)
From:	Hugh Dickins <hugh@...itas.com>
To:	Rik van Riel <riel@...hat.com>
cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>,
	Gene Heskett <gene.heskett@...il.com>
Subject: Re: [PATCH] mm: evict streaming IO cache first

On Sun, 16 Nov 2008, Rik van Riel wrote:
> 
> I wonder if the "do not do mark_page_accessed at page fault time"
> patch is triggering the current troublesome behaviour in the VM,
> because actively used file pages are not moved out of the way of
> the VM - which leads get_scan_ratio to believe that we are already
> hitting the working set on the file side and should also start
> scanning the anon LRUs.

That patch is only in the -mm tree, not in 2.6.28-rc.

Hugh
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