linux-kernel - Re: bad rss-counter message in 3.14rc5

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Message-ID: <531F24A6.2020409@oracle.com>
Date:	Tue, 11 Mar 2014 10:58:46 -0400
From:	Sasha Levin <sasha.levin@...cle.com>
To:	Cyrill Gorcunov <gorcunov@...il.com>, Dave Jones <davej@...hat.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	linux-mm@...ck.org, Linus Torvalds <torvalds@...ux-foundation.org>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Bob Liu <bob.liu@...cle.com>,
	Konstantin Khlebnikov <koct9i@...il.com>
Subject: Re: bad rss-counter message in 3.14rc5

On 03/11/2014 10:37 AM, Cyrill Gorcunov wrote:
> On Tue, Mar 11, 2014 at 10:28:17AM -0400, Dave Jones wrote:
>> On Tue, Mar 11, 2014 at 05:41:58PM +0400, Cyrill Gorcunov wrote:
>>   > On Tue, Mar 11, 2014 at 09:23:05AM -0400, Sasha Levin wrote:
>>   > > >>
>>   > > >>Ok, with move_pages excluded it still oopses.
>>   > > >
>>   > > >Dave, is it possible to somehow figure out was someone reading pagemap file
>>   > > >at moment of the bug triggering?
>>   > >
>>   > > We can sprinkle printk()s wherever might be useful, might not be 100% accurate but
>>   > > should be close enough to confirm/deny the theory.
>>   >
>>   > After reading some more, I suppose the idea I had is wrong, investigating.
>>   > Will ping if I find something.
>>
>> I can rule it out anyway, I can reproduce this by telling trinity to do nothing
>> other than mmap()'s.   I'll try and narrow down the exact parameters.
>
> Dave, iirc trinity can write log file pointing which exactly syscall sequence
> was passed, right? Share it too please.

I've sent one of those last time I reported this issue:

	https://lkml.org/lkml/2014/1/22/625


Thanks,
Sasha
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