Re: [Qemu-devel] dataplane bug: fail to start VM with dataplane enable

[Dunrong Huang]

On Wed, Mar 13, 2013 at 7:28 PM, Stefan Hajnoczi <address@hidden> wrote:
> On Wed, Mar 13, 2013 at 06:01:40PM +0800, Dunrong Huang wrote:
>> Hi,  Paolo && Stefan:
>>
>> When I test the dataplane feature with git master, I find that VM will
>> hang if dataplane is enabled. But if I use qemu-1.4.0, VM can start
>> normally.
>>
>> The command I boot QEMU is:
>> x86_64-softmmu/qemu-system-x86_64 -enable-kvm -m 1024 -smp 2 -drive
>> file=centos-6.4.raw,if=none,id=drive-virtio-disk,format=raw,cache=none,aio=native
>> -device 
>> virtio-blk-pci,config-wce=off,scsi=off,x-data-plane=on,drive=drive-virtio-disk,id=virtio-disk
>>
>> git bisect implicates this bug was introduced by following commit:
>>
>> commit 82959e8262df7da882d715f8a0cb4e8c7cd6e94b
>> Author: Paolo Bonzini <address@hidden>
>> Date:   Fri Feb 22 10:40:34 2013 +0100
>>
>>     dataplane: remove EventPoll in favor of AioContext
>
> It reproduces here too using a RHEL 6.4 guest image.  Hang at the BIOS
> screen before GRUB is loaded.
>
I have tested the patch Paolo sent yesterday, it really fixes this bug.

http://lists.gnu.org/archive/html/qemu-devel/2013-03/msg02200.html



-- 
Best Regards,

Dunrong Huang