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

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Message-ID: <20140311142817.GA26517@redhat.com>
Date:	Tue, 11 Mar 2014 10:28:17 -0400
From:	Dave Jones <davej@...hat.com>
To:	Cyrill Gorcunov <gorcunov@...il.com>
Cc:	Sasha Levin <sasha.levin@...cle.com>,
	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 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

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