On 04.07.2009, at 17:25, Avi Kivity wrote:
On 07/03/2009 05:41 PM, Andre Przywara wrote:
Hi,
currently SMP guests happen to see<n> vCPUs as<n> different
sockets.
Some guests (Windows comes to mind) have license restrictions and
refuse
to run on multi-socket machines.
So lets introduce a "cores=" parameter to the -cpu option to let
the user
specify the number of _cores_ the guest should see.
This patch has not been tested with all corner cases, so I just
want to
hear your comments whether
a) we need such an option and
b) you like this particular approach.
Applying this qemu.git patch to qemu-kvm.git fixes Windows SMP boot
on
some versions, I successfully tried up to -smp 16 -cpu host,cores=8
with
WindowsXP Pro.
I thought of using -smp [processors=]2,cores=4,threads=2 (for a
total of 16 threads), but I think it makes more sense with -cpu.
I actually think putting this in -smp makes more sense. -cpu really
shouldn't need to be touched by normal users and as long as you can
either -cpu host or -cpu safe that should be enough.
But then again maybe we should replace -smp with something more useful
like -numa where you'd then specify #CPUs, #cores, mem-cpu connection,
etc.
Alex
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
