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Date:	Thu, 22 May 2014 17:30:51 +0100
From:	Mel Gorman <>
To:	Yuanhan Liu <>
Cc:	Andrew Morton <>,
	Johannes Weiner <>,
	Hugh Dickins <>,
	Tim Chen <>,
	Dave Chinner <>,
	Bob Liu <>, Jan Kara <>,
	Rik van Riel <>,
	Linux Kernel <>,
	Linux-MM <>,
	Linux-FSDevel <>
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
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