From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59312) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aWAx0-0000A5-RJ for qemu-devel@nongnu.org; Wed, 17 Feb 2016 17:52:08 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aWAwv-00041I-7C for qemu-devel@nongnu.org; Wed, 17 Feb 2016 17:52:02 -0500 Received: from mx1.redhat.com ([209.132.183.28]:34269) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aWAwv-000419-1b for qemu-devel@nongnu.org; Wed, 17 Feb 2016 17:51:57 -0500 From: Juan Quintela In-Reply-To: <20160217204047.GD10796@thinpad.lan.raisama.net> (Eduardo Habkost's message of "Wed, 17 Feb 2016 18:40:47 -0200") References: <871t8kpo6j.fsf@emacs.mitica> <56C30E11.8040606@de.ibm.com> <20160217204047.GD10796@thinpad.lan.raisama.net> Date: Wed, 17 Feb 2016 23:51:47 +0100 Message-ID: <87mvqz54sc.fsf@emacs.mitica> MIME-Version: 1.0 Content-Type: text/plain Subject: Re: [Qemu-devel] KVM call for agenda for 2016-02-16 Reply-To: quintela@redhat.com List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Eduardo Habkost Cc: Matthew Rosato , Peter Maydell , KVM devel mailing list , David Hildenbrand , qemu-develQEMU Developer , Christian Borntraeger , Paul Mackerras , Bharata B Rao , Andreas =?utf-8?Q?F=C3=A4rber?= , David Gibson Eduardo Habkost 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.