Re: [Xen-devel] S3 sleep in dom0 breaks dom0<->domU wallclock synchronization

[Joanna Rutkowska <joanna@xxxxxxxxxxxxxxxxxxxxxx>]

On 07/06/10 14:50, Keir Fraser wrote:
> On 06/07/2010 11:27, "Joanna Rutkowska" <joanna@xxxxxxxxxxxxxxxxxxxxxx>
> wrote:
> 
>>> Wouldn't it be much simpler to not introduce any new logic at all and
>>> just let Dom0 tools/scripts take care of properly suspending
>>> (checkpointing) all (minimally all pv, but I would really think treating
>>> different kinds of guests differently here is unnecessary) guests
>>> before doing a host suspend, as Jeremy had suggested in an earlier
>>> reply?
>>>
>>
>> But wouldn't this require dumping all the VMs memory do disk? Can we use
>> xm pause instead, i.e. will it notify VMs properly?
> 
> It just requires the guests to be put through a guest-side suspend/resume
> cycle. The usual tools-side work of saving to disk etc could be elided. Yes,
> it probably makes sense to extend that existing mechanism to include S3 as
> well. Just needs someone to do the work. :-)
> 

Perhaps it will also solve the resume problem on Core i5/HT systems...

joanna.

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