Re: KVM call for agenda for 2016-02-16

[Eduardo Habkost <ehabkost@redhat.com>]

On Tue, Feb 16, 2016 at 12:54:57PM +0100, Christian Borntraeger wrote:
> So my quick and dirty summary of CPU as _I_ understand it
> (and I only have some part time bandwidth at the moment for that)
> 
> x86 has cpu hotplug. Some history
> qemu-kvm had cpu_set in the past
> qemu has cpu_add for a while now
> libvirt code uses cpu_add cross-platform out of the box
> 
> proposal to use device_add. Currently this has the following issues that
> we need to discuss:
> - will require capability checking and dual code in libvirt (and libvirt updates)
> - Power has some constraints that are hard to model with just device add
> 	- David Gibson proposes a two layer interface
> 		- low level: device add cpu-package
> 		- high level
> - David Hildenbrand has some concerns regarding CPU models (with base model + feature
>   on/off), as device_add needs instantiatable type
> - devel_del: s390 has no interface for cpu removal (Matts latest patches reset the 
> machine just like z/VM - until we have some interface)
> - anything else? (cpu hotplug on ARM or MIPS?)
> 
> Would be good to use todays call to have a plan how to finish things soon.
> (maybe even for 2.6)

Did the call happen? I am away from work for most days during the
next 2 weeks, so I couldn't attend.

-- 
Eduardo