linux-kernel - Re: [PATCH 4/4] mm: vmscan: If kswapd has been running too long, allow it to sleep

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Message-ID: <4DD45C39.5030803@jp.fujitsu.com>
Date:	Thu, 19 May 2011 08:54:33 +0900
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	minchan.kim@...il.com
CC:	mgorman@...e.de, James.Bottomley@...senpartnership.com,
	akpm@...ux-foundation.org, colin.king@...onical.com,
	raghu.prabhu13@...il.com, jack@...e.cz, chris.mason@...cle.com,
	cl@...ux.com, penberg@...nel.org, riel@...hat.com,
	hannes@...xchg.org, linux-fsdevel@...r.kernel.org,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	linux-ext4@...r.kernel.org
Subject: Re: [PATCH 4/4] mm: vmscan: If kswapd has been running too long,
 allow it to sleep

>> I've already submitted a pair of patches for option 1. I don't think
>> option 2 gains us anything. I think it's more likely we should worry
>> about all_unreclaimable being set when shrink_slab is returning 0 and we
>> are encountering so many dirty pages that pages_scanned is high enough.
>
> Okay.
>
> Colin reported he had no problem with patch 1 in this series and
> mine(ie, just cond_resched right after balance_pgdat call without no
> patch of shrink_slab).
>
> If Colin's test is successful, I don't insist on mine.
> (I don't want to drag on for days :( )
> If KOSAKI agree, let's ask the test to Colin and confirm our last test.
>
> KOSAKI. Could you post a your opinion?

Yeah.
I also don't have any motivation to ignore Colin's test result.

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