linux-kernel - Re: [PATCH] vmscan: prevent background aging of anon page in no swap system

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Message-ID: <4C816760.4010807@redhat.com>
Date:	Fri, 03 Sep 2010 17:23:44 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Minchan Kim <minchan.kim@...il.com>, linux-mm <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Venkatesh Pallipadi <venki@...gle.com>,
	Ying Han <yinghan@...gle.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Johannes Weiner <hannes@...xchg.org>
Subject: Re: [PATCH] vmscan: prevent background aging of anon page in no swap
 system

On 09/03/2010 05:06 PM, Andrew Morton wrote:

> We don't have any quantitative data on the effect of these excess tlb
> flushes, which makes it difficult to decide which kernel versions
> should receive this patch.
>
> Help?

I assume it is a relatively small performance optimization,
as well as a nice code cleanup ... so probably no real hurry
to get it upstream (next time you send Linus mm patches?),
and no real reason to have it backported to a -stable kernel
either.

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