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Re: [Qemu-devel] KVM call for agenda for 2016-02-16


From: Eduardo Habkost
Subject: Re: [Qemu-devel] KVM call for agenda for 2016-02-16
Date: Wed, 17 Feb 2016 18:40:47 -0200
User-agent: Mutt/1.5.23 (2014-03-12)

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



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