[libvirt] [PATCH 0/8] Various KVM PCI device assignment improvements

[Mirko Raasch]

Daniel P. Berrange schrieb:
> On Fri, Aug 14, 2009 at 04:09:32PM +0100, Mark McLoughlin wrote:
>   
>> On Fri, 2009-08-14 at 16:41 +0200, Mirko Raasch wrote:
>>     
>>> Hi,
>>>
>>> thanks for you improvements.
>>>
>>> I updated libvirt with git and tried to passthrough two pci devices to a 
>>> linux guest.
>>>
>>>  <hostdev mode='subsystem' type='pci' managed='yes'>
>>>       <source>
>>>         <address domain='0x0000' bus='0x05' slot='0x01' function='0x0'/>
>>>       </source>
>>>     </hostdev>
>>>     <hostdev mode='subsystem' type='pci' managed='yes'>
>>>       <source>
>>>         <address domain='0x0000' bus='0x05' slot='0x03' function='0x0'/>
>>>       </source>
>>>     </hostdev>
>>>
>>> In the guest, only one of them works and after the shutdown of the 
>>> guest, i got a segfault on the host.
>>>
>>> libvirtd[15363]: segfault at 38 ip 0000000000421164 sp 00007fff59d1dfb0 
>>> error 4 in libvirtd[400000+6d000]
>>>
>>> I use kernel 2.6.30-4 on the host.
>>>
>>> What did i wrong?
>>>       
>> It's more a question of what *I* did wrong, probably :-)
>>
>> Did this work before? With what version? Is there any chance you could
>> use git-bisect to find out what commit introduced the regression?
>>
>> If not, please run libvirtd from the command line with LIBVIRT_DEBUG and
>> post the log file somewhere. Also, the guest log file
>> from /var/log/libvirt/qemu would help
>>     
>
> For segfault crashes, your best bet is actually to just run libvirtd
> under valgrind. That usually narrows down the problem more quickly
> than the debug modes
>
> Regards,
> Daniel
>   
If i run libvirtd from the command line, i got no segfault. If i start 
libvirt with "/etc/init.d/libvirt-bin start", i got the
segfault after the shutdown of the guest.

How can i use valgrind or some other debugging options with 
"/etc/init.d/libvirt-bin"?

Mirko