Re: [Qemu-devel] kvm segfaulting

[Paolo Bonzini]

Il 11/02/2013 15:02, Stefan Priebe - Profihost AG ha scritto:
> Hi,
> 
> nothing. What are you searching for?

Some trace that a request was actually cancelled, but I think I believe
that.  This seems to be the same issue as commits
1bd075f29ea6d11853475c7c42734595720c3ac6 (iSCSI) and
473c7f0255920bcaf37411990a3725898772817f (rbd), where the "cancelled"
callback is called before the "complete" callback.

Note how virtio_scsi_request_cancelled is protected against
r->hba_private == NULL, while virtio_scsi_command_complete doesn't.
That's by design, because the latter should never happen or you could
get data corruption in the guest.

What version are you running?  Does the rbd backend have the above commit?

Paolo

> Stefan
> Am 11.02.2013 14:59, schrieb Paolo Bonzini:
>> Il 11/02/2013 14:58, Stefan Priebe - Profihost AG ha scritto:
>>> Hi Paolo,
>>>
>>> as the guest crashes i can't check the guest. On the host i just have
>>> the segmentation fault line. Anything else is from the bootprocess or
>>> enabling the tap device. So nothing suspicious.
>>
>> What about log from the serial console?
>>
>> Paolo
>>
>>> Greets,
>>> Stefan
>>>
>>> Am 11.02.2013 14:56, schrieb Paolo Bonzini:
>>>>> Il 11/02/2013 14:35, Stefan Priebe - Profihost AG ha scritto:
>>>>>>> Hi Stefan,
>>>>>>>
>>>>>>> yes i use virtio-scsi-pci in all my guests. As it is the only one where
>>>>>>> i can use fstrim from guest to storage with rbd ;-)
>>>>>
>>>>> Can you check for anything suspicious in the kernel console output?
>>>>>
>>