linux-kernel - Re: [PATCH 0/3] Fix malloc() stall in zone_reclaim() and bring behaviour more in line with expectations V3

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Message-ID: <alpine.DEB.1.10.0906171447510.30060@gentwo.org>
Date:	Wed, 17 Jun 2009 14:48:36 -0400 (EDT)
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
cc:	Mel Gorman <mel@....ul.ie>,
	Andrew Morton <akpm@...ux-foundation.org>, riel@...hat.com,
	fengguang.wu@...el.com, linuxram@...ibm.com, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Johannes Weiner <hannes@...xchg.org>
Subject: Re: [PATCH 0/3] Fix malloc() stall in zone_reclaim() and bring
 behaviour more in line with expectations V3

On Wed, 17 Jun 2009, KOSAKI Motohiro wrote:

> hm, At least major two zone reclaim developer disagree my patch. Thus I have to
> agree with you, because I really don't hope to ignore other developer's opnion.
>
> So, as far as I understand, the conclusion of this thread are
>   - Drop my patch
>   - instead, implement improvement patch of (may_unmap && page_mapped()) case
>   - the documentation should be changed
>   - it's my homework(?)
>
> Can you agree this?

As far as I understand you: Yes. Unmapping can occur in more advanced zone
reclaim modes but the default needs to be as lightweight as possible.

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