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

[Wei Liu <wei.liu2@xxxxxxxxxx>]

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.

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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