[libvirt] [Xen-devel] [PATCH] libxl: prefer qdisk for <driver name='file'>

[Jim Fehlig]

Stefano Stabellini wrote:
> On Fri, 20 Jun 2014, Jim Fehlig wrote:
>   
>> The libxl driver currently sets the disk backend to
>> LIBXL_DISK_BACKEND_TAP when <driver name='file'> is specified
>> in the <disk> config.  qdisk should be prefered with this
>> configuration, otherwise existing configuration such as the
>> following, which worked with the old Xen driver, will not work
>> with the libxl driver
>>
>>   <disk type='file' device='cdrom'>
>>     <driver name='file'/>
>>     <source file='/path/to/some/iso'/>
>>     <target dev='hdc' bus='ide'/>
>>     <readonly/>
>>   </disk>
>>
>> In addition, tap performs poorly compared to qdisk.
>>
>> Signed-off-by: Jim Fehlig <jfehlig at suse.com>
>>     
>
> Acked-by: Stefano Stabellini <stefano.stabellini at eu.citrix.com>
>   

Thanks Stefano.  This is a change that needed blessing from one of the
Xen tools devs IMO.  I've pushed the patch.

Regards,
Jim