linux-kernel - Re: [PATCH 0/3] Shrinkers and proportional reclaim

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Message-ID: <20140522163051.GJ23991@suse.de>
Date:	Thu, 22 May 2014 17:30:51 +0100
From:	Mel Gorman <mgorman@...e.de>
To:	Yuanhan Liu <yuanhan.liu@...ux.intel.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Johannes Weiner <hannes@...xchg.org>,
	Hugh Dickins <hughd@...gle.com>,
	Tim Chen <tim.c.chen@...ux.intel.com>,
	Dave Chinner <david@...morbit.com>,
	Bob Liu <bob.liu@...cle.com>, Jan Kara <jack@...e.cz>,
	Rik van Riel <riel@...hat.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Linux-MM <linux-mm@...ck.org>,
	Linux-FSDevel <linux-fsdevel@...r.kernel.org>
Subject: Re: [PATCH 0/3] Shrinkers and proportional reclaim

On Fri, May 23, 2014 at 12:14:16AM +0800, Yuanhan Liu wrote:
> On Thu, May 22, 2014 at 10:09:36AM +0100, Mel Gorman wrote:
> > This series is aimed at regressions noticed during reclaim activity. The
> > first two patches are shrinker patches that were posted ages ago but never
> > merged for reasons that are unclear to me. I'm posting them again to see if
> > there was a reason they were dropped or if they just got lost. Dave?  Time?
> > The last patch adjusts proportional reclaim. Yuanhan Liu, can you retest
> > the vm scalability test cases on a larger machine? Hugh, does this work
> > for you on the memcg test cases?
> 
> Sure, and here is the result. I applied these 3 patches on v3.15-rc6,
> and head commit is 60c10afd. e82e0561 is the old commit that introduced
> the regression.  The testserver has 512G memory and 120 CPU.
> 
> It's a simple result; if you need more data, I can gather them and send
> it to you tomorrow:
> 
> e82e0561        v3.15-rc6       60c10afd
> ----------------------------------------
> 18560785        12232122        38868453
>                 -34%            +109
> 
> As you can see, the performance is back, and it is way much better ;)
> 

Thanks a lot for that and the quick response. It is much appreciated.

-- 
Mel Gorman
SUSE Labs
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