From owner-freebsd-hackers@FreeBSD.ORG  Wed Dec 15 19:37:07 2004
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Date: Wed, 15 Dec 2004 13:37:05 -0600
From: Stephen Montgomery-Smith <stephen@math.missouri.edu>
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To: John Baldwin <jhb@freebsd.org>
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Subject: Re: HTT/SMP Dual Xeon systems unstable
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John Baldwin wrote:

> 
> There is a problem in the kernel that causes with 3 or more processors 
> (including logical CPUs from HTT).  Disabling HTT in the BIOS is probably 
> your best bet as it will get you down to 2 CPUs which should work much 
> better.  HTT also isn't but so useful anyways for most workloads.  The 
> instability problems have just been fixed in HEAD and will hopefully be MFC'd 
> for 5.4 btw.
> 

It looks like I have lucked out so far, because I have this set up with 
no problems so far.  I hope this fix gets to 5.x-stable soon because for 
my particular workloads HTT helps a lot.

Stephen