Re: [Xen-users] Issues with vcpu-set

[Anthony PERARD <anthony.perard@citrix.com>]

On Wed, Jan 29, 2014 at 12:39:47PM +0000, Ian Campbell wrote:
> On Wed, 2014-01-29 at 12:36 +0000, Anthony PERARD wrote:
> > On Wed, Jan 29, 2014 at 12:22:17PM +0000, Ian Campbell wrote:
> > > On Wed, 2014-01-29 at 12:18 +0000, Anthony PERARD wrote:
> > > > On Wed, Jan 29, 2014 at 10:11:44AM +0000, Ian Campbell wrote:
> > > > > On Tue, 2014-01-28 at 18:44 -0700, Yun Wang wrote:
> > > > > > Sorry for the so late reply.
> > > > > > I had this issue in Xen-4.3.0 (official release) and Xen-4.4.0-rc1-25-g9a80d50
> > > > > 
> > > > > And are you using the version of qemu-xen which ships with those
> > > > > releases or your own version, perhaps from upstream?
> > > > > 
> > > > > ISTR that vcpu hotplug for HVM guests was missing from qemu-xen in Xen
> > > > > 4.3.x but I thought it had been added during the 4.4.x development
> > > > > cycle. Adding Anthony + xen-devel to confirm.
> > > > 
> > > > We've added vcpu hotplug to our tree in Xen 4.3.
> > > > 
> > > > QEMU upstream is able to do vcpu hotplug with Xen only with the last
> > > > release, 1.7. The two previous release (1.5 and 1.6) miss two patches,
> > > > and any QEMU release before that those not support cpu hotplug.
> > > 
> > > OK. IIRC Xen 4.3 included qemu 1.3 or so?
> > 
> > That's right, qemu 1.3.
> > 
> > > 4.4-rc1 should have had the 1.6 merge in it, but not 1.7, correct?
> > 
> > That's correct.
> > 
> > > So it also misses those patches.
> > 
> > No, I've put those patches on top of the merge, otherwise, there would
> > have been regression.
> 
> So this functionality should work with xen 4.4.0-rc1 (using whatever
> version was referenced by xen.git/Config.mk) or not?

Yes, it should. You can go back to my first reply to this threads and
read the all mail ;-). I reply to what appear to me the "error" that
made someone think that somethings goes wrong.

-- 
Anthony PERARD