Re: [libvirt] [Xen-devel] [PATCH] libxl: prefer qdisk for <driver name='file'>
On Tue, 2014-06-24 at 16:24 -0600, Jim Fehlig wrote:
Ian Campbell wrote:
> On Fri, 2014-06-20 at 15:07 -0600, 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
>>
>
> OOI why not let libxl pick the most appropriate backend for (most of)
> these alternatives?
>
I think the libvirt approach is to be a bit more explicit, instead of
relying on hypervisor defaults that might change over time. I'm quite
sure this is the approach danpb has always advocated.
I thought that policy was more for guest visible things whereas the disk
backend is transparent to the guest.
But either way it's up to libvirt.
Thanks,
Ian.