Re: [Xen-devel] [RFC] Improving CPU hotplug for 4.3 with qemu-xen

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

George Dunlap writes ("Re: [Xen-devel] [RFC] Improving CPU hotplug for 4.3 with 
qemu-xen"):
> On Fri, Jul 19, 2013 at 4:26 PM, Anthony PERARD
> <anthony.perard@xxxxxxxxxx> wrote:
> > The cpu hotplug that have been backported from QEMU to qemu-xen (1.5 to
> > 1.3) is incomplete. Especially, there is no way to know if a CPU is
> > already marked as online by qemu. This result by those error messages
> > from libxl:
> >
> > libxl: error: libxl_qmp.c:289:qmp_handle_error_response: received an
> > error message from QMP server: Unable to add CPU: 0, it already exists
> > libxl: error: libxl_qmp.c:289:qmp_handle_error_response: received an
> > error message from QMP server: Unable to add CPU: 1, it already exists
> >
> > So I tried to backport more patches so it will become possible for libxl
> > to get the list of online cpu.
> >
> > But this result in *a lot* of patches.
> >
> > Here is the git tree and see the list of patches at the end of the mail:
> > git://xenbits.xen.org/people/aperard/qemu-dm.git  backport-cpu-device

Blimey.

> I think updates to the stable tree are now IanJ's decision.  It seems
> like this is an awful lot to backport.

I agree.  I don't think this is really backport material.
Stefano, do you have an opinion ?

Ian.

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