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Re: [Xen-devel] Xen CPU limit?

To: Jan Beulich <JBeulich@xxxxxxxxxx>
Subject: Re: [Xen-devel] Xen CPU limit?
From: Martin Lukasik <martin.lukasik@xxxxxxxxxxxxx>
Date: Mon, 29 Mar 2010 17:03:53 +0100
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Jan Beulich wrote:
Martin Lukasik <martin.lukasik@xxxxxxxxxxxxx> 11.03.10 17:08 >>>
Can somebody explain why the number of CPUs Xen can handle is limited to 32?
I have a machine with 48 cores, and would love to virtualise it, but if I do it, I loose 16 CPUs, which isnt very good... :-( Where is this limit coming from? Or maybe it is possible to change it somewhere in the source files?

This is done on the make command line, by adding "max_phys_cpus=...".


Yeah... I thought that installing it from RPM wasn't a good idea... ;-)
Thanks for the info. Will give it a try some time this week.

BTW.: Wouldn't it make sense to include support for max number of CPUs when building RPMs?


Martin Lukasik                                    tel: +44 20 7269 3115
Bioinformatics Officer
Bioinformatics and Biostatistics
Cancer Research UK, London Research Institute
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