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Date: Tue, 11 Mar 2014 10:28:17 -0400
From: Dave Jones <davej@redhat.com>
To: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Sasha Levin <sasha.levin@oracle.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Linux Kernel <linux-kernel@vger.kernel.org>, linux-mm@kvack.org,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Joonsoo Kim <iamjoonsoo.kim@lge.com>, Bob Liu <bob.liu@oracle.com>,
        Konstantin Khlebnikov <koct9i@gmail.com>
Subject: Re: bad rss-counter message in 3.14rc5
Message-ID: <20140311142817.GA26517@redhat.com>
Mail-Followup-To: Dave Jones <davej@redhat.com>,
	Cyrill Gorcunov <gorcunov@gmail.com>,
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	Linux Kernel <linux-kernel@vger.kernel.org>, linux-mm@kvack.org,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Joonsoo Kim <iamjoonsoo.kim@lge.com>, Bob Liu <bob.liu@oracle.com>,
	Konstantin Khlebnikov <koct9i@gmail.com>
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 <20140311045109.GB12551@redhat.com>
 <20140310220158.7e8b7f2a.akpm@linux-foundation.org>
 <20140311053017.GB14329@redhat.com>
 <20140311132024.GC32390@moon>
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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