Re: [BUG] kvm crashes in 2.6.28-rc6-00007-ged31348

[Avi Kivity <avi@redhat.com>]

Luis Henriques wrote:
> On Sun, Nov 30, 2008 at 10:44:55PM +0200, Avi Kivity wrote:
>   
>> Luis Henriques wrote:
>>     
>>> No, I was not able to reproduce the issue.  Please let me know if you need some
>>> more information on my system (.config, for instance).
>>>   
>>>       
>> Were you using some other virtualization product?  Were you running  
>> suspend/resume?
>>     
>
> No for both questions.  However, I had compiled support for suspend (not sure if
> this is what you mean by "running suspend/resume") - This is a feature I used
> only once or twice...
>   

The underlying problem is that an svm instruction has been executed, but 
svm is disabled.  Since kvm enables svm unconditionally on all 
processors on startup, there are only a few paths that can potentially 
trigger this:

- another virtualization module turned svm off
- cpu hotadd/hotremove (suspend/resume triggers this)
- something did a read-modify-write cycle on cr4 (which contains the svm 
enable bit) while kvm enabled that bit
- core was turned off (does linux power management do that?)

Anything ring a bell?

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