linux-kernel - Re: kvm: repeatable kernel crash with Athlon II cpu

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Message-ID: <56FAACDC.1010802@redhat.com>
Date:	Tue, 29 Mar 2016 18:27:08 +0200
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Stas Sergeev <stsp@...t.ru>, kvm@...r.kernel.org
Cc:	Stas Sergeev <stsp@...rs.sourceforge.net>,
	Linux kernel <linux-kernel@...r.kernel.org>
Subject: Re: kvm: repeatable kernel crash with Athlon II cpu



On 29/03/2016 18:08, Stas Sergeev wrote:
> > > I've been running dosemu and found out that it hangs
> > > or reboots one of my PCs. This happens with any fedora-23
> > > kernels and hand-compiled kernels. The latest I tried, were:
> > > 4.4.6-300.fc23.x86_64
> > > 4.5.0-rc6
> > 
> > Can you check if 4.3 works?
> 
> Same crash on kernel-4.2.3-300.fc23.x86_64 - the oldest
> available for f23.
> 
>>> >> Hope someone can find such an old CPU an reproduce the problem.
>>> >> Please let me know what info should I provide or what debugging
>>> >> to do to help getting that fixed.
>> > 
>> > Do you have experience bisecting the kernel?  If so perhaps you can try
>> > doing that.
> But it looks like a genuine bug, not a regression.

Yeah, I was hoping it was introduced recently.

> Of course I can check some 3.x versions...

That would help a lot, thanks.

Paolo