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Date:      Wed, 15 Dec 2004 13:37:05 -0600
From:      Stephen Montgomery-Smith <stephen@math.missouri.edu>
To:        John Baldwin <jhb@freebsd.org>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: HTT/SMP Dual Xeon systems unstable
Message-ID:  <41C09261.2030806@math.missouri.edu>
In-Reply-To: <200412150958.48432.jhb@FreeBSD.org>
References:  <56637.81.84.175.77.1102689148.squirrel@81.84.175.77> <200412150958.48432.jhb@FreeBSD.org>

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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



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