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RE: [Xen-devel] Setting dom0-cpus to 0 doesn't use all cpus asdocumented

To: "Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>, "Ryan Harper" <ryanh@xxxxxxxxxx>
Subject: RE: [Xen-devel] Setting dom0-cpus to 0 doesn't use all cpus asdocumented
From: "Jan Beulich" <jbeulich@xxxxxxxxxx>
Date: Tue, 09 May 2006 18:01:55 +0200
Cc: Xen-devel@xxxxxxxxxxxxxxxxxxx, Susan Krysan <KRYSANS@xxxxxxxxxx>, Aravindh Puthiyaparambil <aravindh.puthiyaparambil@xxxxxxxxxx>, Raj Subrahmanian <raj.subrahmanian@xxxxxxxxxx>, Bruce A Vessey <Bruce.Vessey@xxxxxxxxxx>, Brian A Carb <Brian.Carb@xxxxxxxxxx>
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>>> "Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx> 09.05.06 17:52 >>>
>
>> > You can just use the normal xm commands to vary the number of CPUs.
>> > Restarting xend is a rather brutal way of trying to achieve 
>> the same 
>> > thing...
>> 
>> Is it worth keeping dom0-cpus then?
>
>Yes, it sets it when xend starts.

Except when the value is zero. If a previous session lowered the number of 
VCPUs, then that value will get restored
(from xenstored) rather than using all VCPUs as dom0_vcpus=0 would suggest.

Jan

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