Re: [Xen-devel] [PATCH 1/1] xc_domain_restore: Allow QEMU to increase memory

[Don Slutz <dslutz@xxxxxxxxxxx>]

On 04/15/15 12:52, Wei Liu wrote:
> On Wed, Apr 15, 2015 at 05:45:15PM +0100, Ian Campbell wrote:
>> On Wed, 2015-04-15 at 17:36 +0100, Wei Liu wrote:
>>> On Wed, Apr 15, 2015 at 03:34:48PM +0100, Ian Campbell wrote:
>>>> On Tue, 2015-04-14 at 18:54 +0100, Wei Liu wrote:
>>>>> Let's see if we can record this in xc image format. I haven't looked,
>>>>> but George mentioned that it might be possible to do so.
>>>>
>>>> Can this not be done at the save stage in the bit where we update the
>>>> JSON to reflect the actual configuration?
>>>>
>>>
>>> Yes, it's possible to do that. The value is not in libxl idl simply
>>> because it's always not there.
>>
>> We can't set the existing maxmem then?
>>
> 
> If the "we" in your question means an applications that use libxl's
> public interface, then no. It's not in IDL. It's not in xenstore. That
> value is currently managed by libxl + libxc + xen.
> 

And just to be clear all this is related to LIBXL_MAXMEM_CONSTANT.
Which is not in JSON, nor xenstore, nor libxc, nor xen.

   -Don Slutz

> Wei.
> 
>>> But this might not help COLO / Remus.  If they don't use that API to
>>> retrieve domain configuration, a stale value might still get sent to the
>>> other end.
>>>
>>> Wei.
>>>
>>>> Ian.
>>

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