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RE: [Xen-devel] SMP guest support in unstable tree.

To: "Christian Limpach" <Christian.Limpach@xxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-devel] SMP guest support in unstable tree.
From: "James Harper" <JamesH@xxxxxxxxxxxxxxxx>
Date: Thu, 16 Dec 2004 10:50:21 +1100
Delivery-date: Wed, 15 Dec 2004 23:44:37 +0000
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Thread-index: AcTi/mDdaC1dxthcSMSntfFJG+WwwQAAcy5g
Thread-topic: [Xen-devel] SMP guest support in unstable tree.
> The unstable tree now includes support for SMP guests, i.e.
> domains which run on multiple cpus.  SMP guests can use between
> 1 and 32 virtual cpus, even if the machine has fewer physical cpus.
> The code is highly experimental and performance will improve over
> time.

Cool. Can you elaborate on 'highly experimental'? I'm now running the
'stable' distribution but would consider using unstable for this feature
if it were vaguely reliable.

How does migration work between SMP & non SMP servers? I'd assume that
running a domain with more cpu's than physically exist would take a
performance hit, but do you know how much? If I migrate a domain from a
dual cpu server to a single cpu server, is there an easy way of telling
the domain to only use 1 cpu now please?

Thanks

James


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