linux-kernel - Re: Regression: Bad page map in process xyz

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Date:	Sun, 26 Feb 2012 05:10:31 -0800 (PST)
From:	Hugh Dickins <hughd@...gle.com>
To:	Maciej Rutecki <maciej.rutecki@...il.com>
cc:	Jiri Slaby <jslaby@...e.cz>, n-horiguchi@...jp.nec.com,
	kamezawa.hiroyu@...fujitsu.com,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Jiri Slaby <jirislaby@...il.com>, linux-mm@...ck.org
Subject: Re: Regression: Bad page map in process xyz

On Sun, 26 Feb 2012, Maciej Rutecki wrote:
> On poniedziałek, 20 lutego 2012 o 11:02:17 Jiri Slaby wrote:
> > Hi,
> > 
> > I'm getting a ton of
> > BUG: Bad page map in process zypper  pte:676b700029736c6f pmd:44967067
> > when trying to upgrade the system by:
> > zypper dup
> > 
> > I bisected that to:
> > commit afb1c03746aa940374b73a7d5750ee05a2376077
> > Author: Naoya Horiguchi <n-horiguchi@...jp.nec.com>
> > Date:   Fri Feb 17 10:57:58 2012 +1100
> > 
> >     thp: optimize away unnecessary page table locking
> > 
> > thanks,
> 
> I created a Bugzilla entry at 
> https://bugzilla.kernel.org/show_bug.cgi?id=42820
> for your bug/regression report, please add your address to the CC list in 
> there, thanks!

No, thanks for spotting it, but please remove from the regressions
report: it's not a regression in 3.3-rc but in linux-next - don't take
my word for it, check the commit and you'll not find it in 3.3-rc.

We do still need to get the fix into linux-next: Horiguchi-san, has
akpm put your fix in mm-commits yet?  Please send it again if not.

Hugh