linux-kernel - Re: KVM segfaults with 3.5 while installing ubuntu 12.04

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Message-ID: <501F846C.50903@profihost.ag>
Date:	Mon, 06 Aug 2012 10:46:36 +0200
From:	Stefan Priebe - Profihost AG <s.priebe@...fihost.ag>
To:	Avi Kivity <avi@...hat.com>
CC:	mtosatti@...hat.com, kvm@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: KVM segfaults with 3.5 while installing ubuntu 12.04

 >Am 06.08.2012 10:36, schrieb Avi Kivity:
> On 08/05/2012 10:00 PM, Stefan Priebe wrote:
>>>>>>>>> So here are 3 backtraces from booting the rescue system:
>>>>>>>>> http://pastebin.com/raw.php?i=xCy2pEcP
>>>>>>>>>
>>>>>>>>> To me they all look the same.
>>>>>>>>
>>>>>>>> They are.  What version of qemu are you using?
>>>>>>>
>>>>>>> latest stable-1.1 branch (1.1.1) - which works fine with latest RHEL6
>>>>>>> kernel.
>>>>>>
>>>>>> This could be due to a kernel bug, or due to a different code path
>>>>>> taken
>>>>>> in qemu because of differing features exposed to kvm.
>>>>>>
>>>>>> Please try qemu-kvm.git master and report.
>>
>> OK got it running it's just awfully slow and i was too impatient. It
>> crashes at the part as 1.1.1 stable.
>>
>
> Slow?  what does 'info kvm' say?

Will recheck right now i'm running 1.1.1 again.

> I got master running and it wasn't particularly slow.  I'll try 1.1.1 too.

But still i got the segfault and core dump - this is my main problem? I 
mean qemu-kvm master isn't declared as stable. So i don't care about the 
slowness here.

What can we do about the core dump and crash?

Stefan
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