Date: Wed, 16 Nov 2011 03:47:47 -0600
From: William Pitcock <nenolod@dereferenced.org>
To: Florian Heigl <florian.heigl@gmail.com>
Cc: alpine-devel@lists.alpinelinux.org
Subject: Re: [alpine-devel] Limited number of CPUs
Message-ID: <20111116034747.4bf9c681@petrie.dereferenced.org>
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References: <CAFivhPmm9bs5g_-y-6iZaawMhypKVUqJuDhA2dnJxOr1Z=2adA@mail.gmail.com>
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Hi,

On Tue, 15 Nov 2011 18:23:34 +0100
Florian Heigl <florian.heigl@gmail.com> wrote:

> 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.

This was a regression introduced at some point (not entirely sure when).
It has been fixed by 'linux-grsec=3.0.9-r1@edge'.

If your APK does not recognize edge repo, you can add it to
your /etc/apk/repositors like so:

"@edge http://nl.alpinelinux.org/alpine/edge/main"

I assume that Natanael will probably backport the change to 2.3 soonish.

William


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