Native preemption is the culprit [was Re: today's CURRENT lockups]

[Steve Kargl]

On Fri, Jul 09, 2004 at 12:19:09PM -0500, Jon Noack wrote:
> On 07/09/04 12:15, John Baldwin wrote:
> >My test machine is not a true SMP machine either, just HTT.  It has been 
> >running a -j 256 worldloop overnight with no problems, so I committed a 
> >slightly modified version of the patch yesterday.
> 
> Did you test with a UP kernel?  After your latest commit I have been 
> experiencing regular hard locks on my pre-HTT P4 machine.  Backing out 
> rev. 1.114 of sched_ule.c fixes it.  See my previous message (Re: 
> FreeBSD keeps hanging......):
> http://docs.freebsd.org/cgi/mid.cgi?40EECC49.3070501

I've tested it on a UP kernel (HTT enabled, ACPI disabled,
APIC enabled, ULE).   Appears to work fine.

-- 
Steve