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From: "Huang\, Ying" <ying.huang@intel.com>
To: Michal Hocko <mhocko@kernel.org>
Cc: kernel test robot <xiaolong.ye@intel.com>,
        Stephen Rothwell <sfr@canb.auug.org.au>,
        Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>,
        Hillf Danton <hillf.zj@alibaba-inc.com>,
        LKML <linux-kernel@vger.kernel.org>,
        "Johannes Weiner" <hannes@cmpxchg.org>, Mel Gorman <mgorman@suse.de>,
        David Rientjes <rientjes@google.com>,
        Andrew Morton <akpm@linux-foundation.org>, <lkp@01.org>,
        KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Subject: Re: [LKP] [lkp] [mm, oom] faad2185f4: vm-scalability.throughput -11.8% regression
References: <20160427031556.GD29014@yexl-desktop>
	<20160427073617.GA2179@dhcp22.suse.cz>
Date: Wed, 27 Apr 2016 16:20:43 +0800
In-Reply-To: <20160427073617.GA2179@dhcp22.suse.cz> (Michal Hocko's message of
	"Wed, 27 Apr 2016 09:36:18 +0200")
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Michal Hocko <mhocko@kernel.org> writes:

> On Wed 27-04-16 11:15:56, kernel test robot wrote:
>> FYI, we noticed vm-scalability.throughput -11.8% regression with the following commit:
>
> Could you be more specific what the test does please?

The sub-testcase of vm-scalability is swap-w-rand.  An RAM emulated pmem
device is used as a swap device, and a test program will allocate/write
anonymous memory randomly to exercise page allocation, reclaiming, and
swapping in code path.

Best Regards,
Huang, Ying