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Date: Tue, 15 Nov 2011 18:23:34 +0100
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Subject: [alpine-devel] Limited number of CPUs
From: Florian Heigl <florian.heigl@gmail.com>
To: alpine-devel@lists.alpinelinux.org
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Hi,

I have a question about the maximum number of CPUs in a default Alpine kernel.
I had noticed this on 2.2.2 and now on 2.3.1, too.

In a dual-12core Opteron box I see only 8 active CPUs.

localhost:~# grep proc /proc/cpuinfo
processor	: 0
processor	: 1
processor	: 2
processor	: 3
processor	: 4
processor	: 5
processor	: 6
processor	: 7

I guess this limit was set somewhere and never good into anybodys way,
but now that
Alpine is starting to have Xen dom0 support this (might) be an issue for some.

Ideally you only hand over 2-3 CPU cores (as much as you need for
network and disk IO)
to the Xen management VM dom0 and the rest is just for "payload"
virtual machines.

But not everyone does it like that so it would be nice to have all available.

Does anyone know if this is an intentional limit?


Greetings,
Florian

-- 
the purpose of libvirt is to provide an abstraction layer hiding all
xen features added since 2006 until they were finally understood and
copied by the kvm devs.


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