From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ian Campbell Subject: Re: [PATCH 0/4] CPU hotplug port from qemu-traditionnal to qemu-xen for 4.3. Date: Mon, 3 Jun 2013 09:41:48 +0100 Message-ID: <1370248908.404.11.camel@zakaz.uk.xensource.com> References: <1370017993-13437-1-git-send-email-anthony.perard@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1370017993-13437-1-git-send-email-anthony.perard@citrix.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Anthony PERARD Cc: Stefano Stabellini , Xen Devel List-Id: xen-devel@lists.xenproject.org On Fri, 2013-05-31 at 17:33 +0100, Anthony PERARD wrote: > Hi all, > > This series ports few patches from qemu-xen-traditionnal to qemu-xen > (upstream). There is as little modification as possible on those patches so > they *can not* be upstream as is. So this is only for 4.3. A proper series will > be done for 4.4. > > There make possible to have CPU hotplug on qemu-xen. > > A patch for libxl will follow, which make use of the old command line > -vcpu_avail with qemu-xen. This command line will probably not be upstream. > > BUG: There is an issue with SeaBIOS (used with qemu-xen). At SMP > initialisation, SeaBIOS will count the number of CPU running, and the number is > always equal to maxvcpu when SeaBIOS expect less. This happen when we have > something like: > vcpus = 2 > maxvcpus = 8 > in the VM config file. Linux is fine with this and will use only $vcpus. So > the probleme is: an infinit loop in SeaBIOS. I'm a bit confused -- if SeaBIOS has an infinite loop how do you even get to know Linux is OK? Do you have a fix for SeaBIOS, I don't see it in this series. Ian.