linux-kernel - Re: [RFC] Tracking mlocked pages and moving them off the LRU

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Message-ID: <Pine.LNX.4.64.0702050933410.26272@schroedinger.engr.sgi.com>
Date:	Mon, 5 Feb 2007 09:34:40 -0800 (PST)
From:	Christoph Lameter <clameter@....com>
To:	Matt Mackall <mpm@...enic.com>
cc:	Arjan van de Ven <arjan@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	Nick Piggin <nickpiggin@...oo.com.au>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Rik van Riel <riel@...hat.com>
Subject: Re: [RFC] Tracking mlocked pages and moving them off the LRU

On Mon, 5 Feb 2007, Matt Mackall wrote:

> 2) lazy accounting - the same as above, with the work all moved to the
> LRU sweep
> 3) accounting with an extra page flag - still needs to scan VMAs on munmap
> 
> Christoph seems to prefer the third.

No I am saying that 2 requires 3 to work reliably. The patch I posted last 
night does 2 but the approach needs page flag in order to work 
correctly.

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