linux-kernel - Re: [PATCH 01/10] mm: vmscan: Limit the number of pages kswapd reclaims at each priority

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Message-ID: <51576207.4090607@suse.cz>
Date:	Sat, 30 Mar 2013 23:07:03 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	Michal Hocko <mhocko@...e.cz>
CC:	Mel Gorman <mgorman@...e.de>, Linux-MM <linux-mm@...ck.org>,
	Valdis Kletnieks <Valdis.Kletnieks@...edu>,
	Rik van Riel <riel@...hat.com>,
	Zlatko Calusic <zcalusic@...sync.net>,
	Johannes Weiner <hannes@...xchg.org>,
	dormando <dormando@...ia.net>,
	Satoru Moriya <satoru.moriya@....com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 01/10] mm: vmscan: Limit the number of pages kswapd reclaims
 at each priority

On 03/29/2013 09:22 AM, Michal Hocko wrote:
> On Thu 28-03-13 23:31:18, Jiri Slaby wrote:
>> On 03/25/2013 10:13 AM, Jiri Slaby wrote:
>>> BTW I very pray this will fix also the issue I have when I run ltp tests
>>> (highly I/O intensive, esp. `growfiles') in a VM while playing a movie
>>> on the host resulting in a stuttered playback ;).
>>
>> No, this is still terrible. I was now updating a kernel in a VM and had
>> problems to even move with cursor.
> 
> :/
> 
>> There was still 1.2G used by I/O cache.
> 
> Could you collect /proc/zoneinfo and /proc/vmstat (say in 1 or 2s
> intervals)?

Sure:
http://www.fi.muni.cz/~xslaby/sklad/zoneinfos.tar.xz

I ran the update like 10 s after I started taking snapshots. Mplayer
immediately started complaining:

           ************************************************
           **** Your system is too SLOW to play this!  ****
           ************************************************
etc.

thanks,
-- 
js
suse labs
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