linux-kernel - Re: 2.6.23-rc1, KVM-AMD problem

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Message-ID: <46ADE0DD.1030505@qumranet.com>
Date:	Mon, 30 Jul 2007 16:00:13 +0300
From:	Avi Kivity <avi@...ranet.com>
To:	Alistair John Strachan <alistair@...zero.co.uk>
CC:	kvm-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: 2.6.23-rc1, KVM-AMD problem

Alistair John Strachan wrote:
> On Sunday 29 July 2007 14:47:57 you wrote:
>   
>> Alistair John Strachan wrote:
>>     
>>> On Sunday 29 July 2007 12:34:28 you wrote:
>>> [snip]
>>>
>>>       
>>>>> Doesn't help, I still get the same crashes. I tried 2.6.22 again and
>>>>> it's rock solid by comparison.
>>>>>           
>>>> Do you mean, kvm-33 on top of 2.6.22, or the kvm modules from 2.6.22?
>>>> Please describe your configuration *exactly*.
>>>>         
>>> I'm using the kvm-33 *userspace* package (based on Debian's kvm-28
>>> packaging) and 2.6.23-rc1's KVM modules. I patched 2.6.23-rc1 with the
>>> patch you provided in your last email. So I'm not using -git HEAD.
>>>
>>> Maybe there's been additional necessary fixes to -git requiring me to
>>> update to HEAD? That wasn't clear from your last email.
>>>       
>> No,  that patch is the only potential fix post -rc1.  There are a few
>> other fixes there, but they are intended to avoid guest crashes, not
>> host crashes.
>>
>> What guest are you running?  Maybe I can reproduce it here.
>>     
>
> Right now, Windows XP. I'm pretty sure Linux (well, Debian Etch) works fine. I 
> could only get Windows to install with -no-acpi, but I run it with the 
> following (if this is at all useful):
>
> kvm -no-acpi -m 256 -hda $IMAGE -net nic -net tap,script=/etc/kvm/kvm-ifup
>
> Basically, the installer seems to work fine, but Windows seemed to have 
> problems after installing post-SP2 updates. Maybe that's why not everybody is 
> seeing it yet.
>
>   

How about the attached patch? (I haven't yet tried to reproduce, but 
this can cause an AMD-only oops).

-- 
error compiling committee.c: too many arguments to function


View attachment "kvm-fix-debug-registers-on-amd.patch" of type "text/x-patch" (856 bytes)