linux-kernel - Re: __schedule #DF splat

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Message-ID: <20140627115545.GC23153@pd.tnic>
Date:	Fri, 27 Jun 2014 13:55:45 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Paolo Bonzini <pbonzini@...hat.com>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Steven Rostedt <rostedt@...dmis.org>, x86-ml <x86@...nel.org>,
	kvm@...r.kernel.org, Jörg Rödel <joro@...tes.org>
Subject: Re: __schedule #DF splat

On Fri, Jun 27, 2014 at 01:41:30PM +0200, Paolo Bonzini wrote:
> Il 27/06/2014 12:18, Borislav Petkov ha scritto:
> >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...
> 
> Please first try "-M pc-1.7" on the 2.0 QEMU.  If it fails, please do bisect
> it.  A QEMU bisection between one release only usually takes only half an
> hour or so for me.
> 
> I use
> 
> ../configure --target-list=x86_64-softmmu && make distclean &&
> ../configure --target-list=x86_64-softmmu &&
> make -j8 subdir-x86_64-softmmu
> 
> Until it's below 50 commits.  After that point just "make -j8
> subdir-x86_64-softmmu" should do.  This ensures that build system changes do
> not bite you as you move back and forth in time.

Ok, thanks for the help.

However, as it always happens, right after sending the mail, I triggered
it with the qemu installed on the system too :-( I.e., qemu 1.7.1.

So we will try to debug the #DF first to find out why kvm is injecting
it in the first place. I'll keep you posted.

-- 
Regards/Gruss,
    Boris.

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