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Date: Sat, 18 Sep 2004 16:49:12 -0600
From: Scott Long <scottl@samsco.org>
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To: Kris Kennaway <kris@obsecurity.org>
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cc: freebsd-current@freebsd.org
Subject: Re: ULE scheduler not quite there yet
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Kris Kennaway wrote:
> On Sat, Sep 18, 2004 at 12:06:43PM -0700, Sean McNeil wrote:
> 
>>I've had good luck with the 4BSD scheduler and PREEMPTION on so I
>>thought I would try the ULE scheduler.  Was up for just a short time
>>before I got the following on my amd64 machine:
> 
> 
> This is a known problem, BTW.
> 
> Kris

There is likely a message at the top of the dmesg output that says,

"WARNING: Kernel PREEMPTION is unstable under SCHED_ULE."

This has been discussed quite a bit recently and we decided that
focusing on the 4BSD scheduler gave us a better chance at having a
stable system for 5.3.  I still welcome anyone to step in and
investigate the problems with ULE.

Scott