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

[Eric Anderson]

John Baldwin wrote:

>On Friday 09 July 2004 01:19 pm, 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
>>    
>>
>
>No, it's running an SMP kernel.  I have seen one hard lockup on a UP kernel on 
>my laptop when trying to use xmms in KDE while using ULE.
>
>  
>

Just for a point of reference, I updated yesterday (first time in about 
45 days), and now I'm seeing lockups too..

I'm running a UP kernel, with 4BSD scheduler..

Eric


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Eric Anderson     Sr. Systems Administrator    Centaur Technology
Talk sense to a fool and he calls you foolish.
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