On Fri, Nov 24, 2017 at 15:38:54 +0100, Michal Privoznik wrote:
On 08/22/2017 06:27 PM, Paolo Bonzini wrote:
Hi all,
Sorry for resurrecting old thread but seems like there was no agreement reached.
We don't want to expose any paths because the fact that PR helper is a separate binary that uses a UNIX socket to talk to qemu is a implementation detail of qemu. Other HVs may have it differently.
However, we want to be able to turn it on/off or not mention it at all on per-disk basis. So what has been suggested so far is:
<disk type='block' device='disk'> <source dev='/dev/sda'> <target dev='sda' bus='scsi'/> <reservations enable='yes'/> </disk>
Note that if the reservation is applied to the image and not the disk the element should become child of the <source> elememt. Especially if there is only a ever so slight chance that it will work with formats supporting backing store (qcow2) and thus there would be a need to configure it per-image.