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xen-devel
Re: [Xen-devel] Domain 0 SMP
> 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"
All domains are equal regarding their interface to the CPU - Xen is
responsible for sharing out the CPU. Xen 2.x only supports SMP domains,
hence all domains must be SMP. Xen 3.0 will support SMP domains (dom0 and
domU), this is being developed in the unstable tree.
Xen itself supports SMP, so you can put domains on each CPU.
> 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"?
nosmp is to tell Xen not to use smp (i.e. run domains just on one CPU).
HTH,
Mark
> (I am using xen-2.0.4-src, and am working in the 'linux-2.6.10-xen0'
> directory created by a call to 'make kernels')
>
> Thanks.
>
>
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