linux-kernel - Re: [lkp] [mm, page_alloc] d0164adc89: -100.0% fsmark.app

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Message-ID: <87oaegmeer.fsf@yhuang-dev.intel.com>
Date:	Fri, 27 Nov 2015 09:14:52 +0800
From:	"Huang\, Ying" <ying.huang@...ux.intel.com>
To:	Mel Gorman <mgorman@...hsingularity.net>
Cc:	lkp@...org, LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Rik van Riel <riel@...hat.com>,
	Vitaly Wool <vitalywool@...il.com>,
	David Rientjes <rientjes@...gle.com>,
	Christoph Lameter <cl@...ux.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Michal Hocko <mhocko@...e.com>,
	Vlastimil Babka <vbabka@...e.cz>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [lkp] [mm, page_alloc] d0164adc89: -100.0% fsmark.app_overhead

Hi, Mel,

Mel Gorman <mgorman@...hsingularity.net> writes:

> On Thu, Nov 26, 2015 at 08:56:12AM +0800, kernel test robot wrote:
>> FYI, we noticed the below changes on
>> 
>> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
>> commit d0164adc89f6bb374d304ffcc375c6d2652fe67d ("mm, page_alloc:
>> distinguish between being unable to sleep, unwilling to sleep and
>> avoiding waking kswapd")
>> 
>> Note: the testing machine is a virtual machine with only 1G memory.
>> 
>
> I'm not actually seeing any problem here. Is this a positive report or
> am I missing something obvious?

Sorry the email subject is generated automatically and I forget to
change it to some meaningful stuff before sending out.  From the testing
result, we found the commit make the OOM possibility increased from 0%
to 100% on this machine with small memory.  I also added proc-vmstat
information data too to help diagnose it.

Best Regards,
Huang, Ying
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