linux-kernel - Re: Bad rss-counter is back on 3.14-stable

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Date:	Wed, 4 Jun 2014 15:12:28 -0400
From:	Dave Jones <davej@...hat.com>
To:	Greg KH <gregkh@...uxfoundation.org>
Cc:	linux-mm@...ck.org, Linux Kernel <linux-kernel@...r.kernel.org>,
	Brandon Philips <brandon.philips@...eos.com>
Subject: Re: Bad rss-counter is back on 3.14-stable

On Wed, Jun 04, 2014 at 11:27:39AM -0700, Greg KH wrote:
 > Hi all,
 > 
 > Dave, I saw you mention that you were seeing the "Bad rss-counter" line
 > on 3.15-rc1, but I couldn't find any follow-up on this to see if anyone
 > figured it out, or did it just "magically" go away?
 > 
 > I ask as Brandon is seeing this same message a lot on a 3.14.4 kernel,
 > causing system crashes and problems:
 > 
 > [16591492.449718] BUG: Bad rss-counter state mm:ffff8801ced99880 idx:0 val:-1836508
 > [16591492.449737] BUG: Bad rss-counter state mm:ffff8801ced99880 idx:1 val:1836508
 > 
 > [20783350.461716] BUG: Bad rss-counter state mm:ffff8801d2b1dc00 idx:0 val:-52518
 > [20783350.461734] BUG: Bad rss-counter state mm:ffff8801d2b1dc00 idx:1 val:52518
 > 
 > [21393387.112302] BUG: Bad rss-counter state mm:ffff8801d0104e00 idx:0 val:-1767569
 > [21393387.112321] BUG: Bad rss-counter state mm:ffff8801d0104e00 idx:1 val:1767569
 > 
 > [21430098.512837] BUG: Bad rss-counter state mm:ffff880100036680 idx:0 val:-2946
 > [21430098.512854] BUG: Bad rss-counter state mm:ffff880100036680 idx:1 val:2946
 > 
 > Anyone have any ideas of a 3.15-rc patch I should be including in
 > 3.14-stable to resolve this?

hard to tell if they were the same issues I was seeing without the full
backtrace. The only bad rss bugs that I recall being fixed for sure were
the ones that Hugh nailed down right before 3.14 (887843961c4b)

I've not seen anything in a while, but that may just be because I end up
hitting other bugs before they get a chance to show.

Brandon, what kind of workload is that machine doing ? I wonder if I can
add something to trinity to make it provoke it.

	Dave
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