linux-kernel - Re: kernel bug in kvm

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Message-Id: <1259598464.29314.2.camel@twinturbo.austin.ibm.com>
Date:	Mon, 30 Nov 2009 10:27:44 -0600
From:	Andrew Theurer <habanero@...ux.vnet.ibm.com>
To:	Avi Kivity <avi@...hat.com>
Cc:	Tejun Heo <tj@...nel.org>, kvm@...r.kernel.org,
	Linux-kernel@...r.kernel.org
Subject: Re: kernel bug in kvm_intel

On Sun, 2009-11-29 at 16:46 +0200, Avi Kivity wrote:
> On 11/26/2009 03:35 AM, Andrew Theurer wrote:
> > I just tried testing tip of kvm.git, but unfortunately I think I might 
> > be hitting a different problem, where processes run 100% in kernel 
> > mode.  In my case, cpus 9 and 13 were stuck, running qemu processes.  
> > A stack backtrace for both cpus are below.  FWIW, kernel.org 
> > 2.6.32-rc7 does not have this problem, or the original problem.
> 
> I just posted a patch fixing this, titled "[PATCH tip:x86/entry] core: 
> fix user return notifier on fork()".
> 
Thank you, Avi.  I am running on this patch and am not seeing this
problem anymore.  I'll be testing for the previous issue next.

-Andrew

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