Re: 2.6.12 with dual way dual core ck804 MB

From: Andi Kleen
Date: Wed Jun 22 2005 - 18:22:29 EST

On Wed, Jun 22, 2005 at 03:26:10PM -0700, Peter Buckingham wrote:
> Andi Kleen wrote:
> >On Tue, Jun 21, 2005 at 02:41:52PM -0700, YhLu wrote:
> >It works for me on several dual core systems, except on a very big
> >one that seems to run into a scheduler problem.
> I'm having similar problems with a 16P x86_64. If I boot it with
> maxcpus=8 I have no problems. Is there some info that might be useful to
> help debug this problem?

There are two problems on AMD >8P. First the APIC addressing doesn't
work and needs to be done differently (I have a patch for that
in the final stages of testing). And then there is a mysterious
scheduler deadlock problem in 2.6.12 that I haven't tracked down yet.
2.6.11+patch works though.

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