Date: Fri, 27 Jun 2014 12:18:31 +0200
From: Borislav Petkov <bp@alien8.de>
To: lkml <linux-kernel@vger.kernel.org>, Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
        Steven Rostedt <rostedt@goodmis.org>, x86-ml <x86@kernel.org>,
        kvm@vger.kernel.org, =?utf-8?B?SsO2cmcgUsO2ZGVs?= <joro@8bytes.org>
Subject: Re: __schedule #DF splat
Message-ID: <20140627101831.GB23153@pd.tnic>
References: <20140625153227.GA13845@pd.tnic>
 <20140625202650.GC13845@pd.tnic>
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On Wed, Jun 25, 2014 at 10:26:50PM +0200, Borislav Petkov wrote:
> On Wed, Jun 25, 2014 at 05:32:28PM +0200, Borislav Petkov wrote:
> > Hi guys,
> > 
> > so I'm looking at this splat below when booting current linus+tip/master
> > in a kvm guest. Initially I thought this is something related to the
> > PARAVIRT gunk but it happens with and without it.
> 
> Ok, here's a cleaner splat. I went and rebuilt qemu to latest master
> from today to rule out some breakage there but it still fires.

Ok, another observation: I was using qemu from sources from the other day:

v2.0.0-1806-g2b5b7ae917e8

Switching back to the installed one:

$ qemu-system-x86_64 --version
QEMU emulator version 1.7.1 (Debian 1.7.0+dfsg-6), Copyright (c) 2003-2008 Fabrice Bellard

fixes the issue.

Joerg says I should bisect but I'm busy with other stuff. If people are
interested in chasing this further, I could free up some time to do
so...

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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