Re: [Qemu-devel] Re: KVM call agenda for Oct 19

Anthony Liguori
2010-10-19T13:29:00Z

On 10/19/2010 07:48 AM, Dor Laor wrote:
> On 10/19/2010 04:11 AM, Chris Wright wrote:
>> * Juan Quintela (quintela@redhat.com) wrote:
>>>
>>> Please send in any agenda items you are interested in covering.
>>
>> - 0.13.X -stable handoff
>> - 0.14 planning
>> - threadlet work
>> - virtfs proposals
>>
>
> - Live snapshots
> - We were asked to add this feature for external qcow2
> images. Will simple approach of fsync + tracking each requested
> backing file (it can be per vDisk) and re-open the new image would
> be accepted?
> - Integration with FS freeze for consistent guest app snapshot
> Many apps do not sync their ram state to disk correctly or frequent
> enough. Physical world backup software calls fs freeze on xfs and
> VSS for windows to make the backup consistent.
> In order to integrated this with live snapshots we need a guest
> agent to trigger the guest fs freeze.
> We can either have qemu communicate with the agent directly through
> virtio-serial or have a mgmt daemon use virtio-serial to
> communicate with the guest in addition to QMP messages about the
> live snapshot state.
> Preferences? The first solution complicates qemu while the second
> complicates mgmt.

- usb-ccid (aka external device modules)

We probably won't get to it for today's call, but we should try to queue
this topic up for discussion. We have a similar situation with vtpm
(existing device model that wants to integrate with QEMU). My position
so far has been that we should avoid external device models because of
difficulty integrating QEMU features with external device models.

However, I'd like to hear opinions from a wider audience.

Regards,

Anthony Liguori

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