From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christian Limpach Subject: Re: Domain 0 SMP Date: Fri, 4 Mar 2005 01:59:58 +0000 Message-ID: <3d8eece205030317595dde39bc@mail.gmail.com> References: <77c15397050303110825ad52a6@mail.gmail.com> Reply-To: Christian.Limpach@cl.cam.ac.uk Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit In-Reply-To: <77c15397050303110825ad52a6@mail.gmail.com> Sender: xen-devel-admin@lists.sourceforge.net Errors-To: xen-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: Remi Broemeling Cc: xen-devel@lists.sourceforge.net List-Id: xen-devel@lists.xenproject.org On Thu, 3 Mar 2005 12:08:35 -0700, Remi Broemeling wrote: > My problem is with the -xen0 kernel -- specifically, I can't find any > place to _enable_ SMP in it. I know that SMP is not currently > possible within -xenU kernels; which is fine. I don't need SMP within > the virtual machines. However, I _do_ need it in the -xen0 kernel, > and the option isn't there in "make ARCH=xen xconfig" No, xen 2.0 doesn't support SMP in virtual machines. dom0 is a virtual machine with some additional privileges, but as far as SMP support is concerned it is just another virtual machine. > What am I doing wrong? How can I enable SMP for the domain 0 Xen > kernel? I note that the documentation lists a 'nosmp' argument that > can be passed as an argument to a -xen0 kernel to turn _off_ SMP. Is > SMP perhaps just "always-on"? The 'nosmp' option is passed to xen itself (not dom0) and would disable smp support in xen. That's not what you want. Because with smp support enabled in xen, you will make good use of your smp hardware as soon as you have more than one virtual machine, by putting them on different cpus (see cpu= option in config file and xm pincpu). christian ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click