Re: [Xen-devel] [PATCH][RESUBMIT] add dom0 vcpu hotplug control

[Christian Limpach <christian.limpach@xxxxxxxxx>]

On 6/14/05, Ryan Harper <ryanh@xxxxxxxxxx> wrote:
> * Ryan Harper <ryanh@xxxxxxxxxx> [2005-06-07 17:05]:
> > This patch adds new control messages for vcpu hotplug events.  Via the
> > xm vcpu_hotplug sub-program, VCPUS in domains can be enabled/disabled
> > when CONFIG_HOTPLUG_CPU is enabled in the target domain's kernel.
> >
> 
> Updated this patch to use vcpu_to_cpu up/down info to control whether
> state changes are sent when hotplugging vcpus.

I've applied both patches.  I think there's a flaw in the way how
vcpu_to_cpu gets passed up to python, the -1 -> # hack is kind of
gross and it won't work for cpus > 9?

Also the whole hotplug stuff is still missing interrupt re-routing
when a vcpu is taken down.  To do this, we need an evtchn operation to
change the vcpu affinity of a port by changing notify_vcpu_id.

    christian

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