Re: Problem after update windows VirtIO drivers

[Alon Levy <alevy@redhat.com>]

On 12/11/2013 11:27 AM, Vadim Rozenfeld wrote:
> On Tue, 2013-12-10 at 15:29 +0200, Alon Levy wrote:
>> On 12/10/2013 04:24 AM, Vadim Rozenfeld wrote:
>>>
>>>
>>> ----- Original Message -----
>>> From: "Alon Levy" <alevy@redhat.com>
>>> To: "Carlos Rodrigues" <cmar@eurotux.com>, kvm@vger.kernel.org, "Vadim Rozenfeld" <vrozenfe@redhat.com>
>>> Sent: Tuesday, December 10, 2013 3:45:32 AM
>>> Subject: Re: Problem after update windows VirtIO drivers
>>>
>>> On 12/09/2013 04:45 PM, Carlos Rodrigues wrote:
>>>> Hello,
>>>>
>>>> After update the VirtIO drivers for Windows Server 2008 R2 64-bit, when
>>>> i reboot virtual machine, the windows OS get stuck on loading bar.
>>>>
>>>> The VirtIO drivers is the latest stable that i made the download from
>>>> http://alt.fedoraproject.org/pub/alt/virtio-win/stable/virtio-win-0.1-74.iso
>>>>
>>>> And i use version 1.2.1 of kvm and the OS of host is Centos 5.8.
>>>>
>>>> I try to install a fresh and clean version same Windows and same drivers
>>>> and get the same problem. With virtio-win-0.1-52 version of drivers, the
>>>> windows server works properly.
>>>>
>>>> I will use the oldest stable version of drivers, but anyone knows some
>>>> issue with latest drivers?
>>>>
>>> [VR]
>>> Hi Carlos,
>>> Could you please post the QEMU command line as well as output
>>> from 'info pci'
>>>
>>> I have an issue that also existed with 0.65, on windows 7 64 bit: when I
>>> have qxl enabled as well I get a crash shortly after initialization of
>>> qxl (at the login screen) in a memory management function of the qxl
>>> driver, indicating something overwrote parts of the allocators
>>> accounting structures. When I disable the virtio driver (leaving the
>>> virtio device) the problem goes away.
>>>
>>> Vadim, is this a known problem? (sorry for hijacking the thread)
>>>
>>> Does it crash into BSOD? Can you share the crash dump file?
>>
>> Yes, the stacktrace is in qxl, like I mentioned (DrvMouseMove) but
>> that's not happening without the virtio driver being loaded.
>>
>> http://people.freedesktop.org/~alon/qxl-0.10-18-debug-virtio-0.74.DMP
>>
> This time it happend in FlushReleaseRing->ReleaseOutput->DebugShowOutput
> path.
> 
> It is a random crash? 

It happens almost immediately after entering the login screen, that is
after display driver has been initialized and sent already some
commands. But the stack trace is not the same always as you saw for
yourself (thanks - I didn't even check, I assumed it was the same as the
last dump).

> Btw, vioserial is the only one virtio driver in your system.
Yep.

> If you are absolutely positive that the system doesn't crash
> without this driver, we can try running it under Driver Verifier
> control (http://support.microsoft.com/kb/244617) mostly interested
> in Memory Allocations checks.

Yes, I'm positive. Thanks, I'll try that.

> 
> Cheers,
> Vadim.
>  
>>>
>>> Best regards,
>>> Vadim.
>>>
>>>
>>>> Regards,
>>>>
>>>
>>
> 
>