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Re: [Xen-devel] [PATCH]x86: Increase the default NR_CPUS to 128.

To: "Keir Fraser" <keir.fraser@xxxxxxxxxxxxx>, "Xiantao Zhang" <xiantao.zhang@xxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH]x86: Increase the default NR_CPUS to 128.
From: "Jan Beulich" <JBeulich@xxxxxxxxxx>
Date: Wed, 10 Mar 2010 14:38:01 +0000
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>>> Keir Fraser <keir.fraser@xxxxxxxxxxxxx> 10.03.10 15:21 >>>
>It would certainly be nice, but at least we can boot all CPUs and run VMs
>across them, minus the finer-grained control. Is this halfway default
>solution for these bigger machines worse than not making an effort at all?

Not sure - with NUMA also defaulting to on, guest creation may fail
because of the failure to enforce the affinity. Not nice, especially
since (I think; a general problem of the tools) the error indication is
rather hard to interpret by someone not knowing the source code.

>At the end of the day packagers can make up their own minds.



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