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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