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

[Juan Quintela <quintela@redhat.com>]

Eduardo Habkost <ehabkost@redhat.com> wrote:
> 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.

Yeap.  I sent some minutes, but they are kind of incoherent, I hope that
Andreas or Christian fill the holes...

Later, Juan.