scheduler (sched_4bsd) questions

[Stephan Uphoff]

On Wed, 2004-09-29 at 04:57, Peter Holm wrote:
> On Tue, Sep 28, 2004 at 10:51:43AM -0400, Stephan Uphoff wrote:
> > On Tue, 2004-09-28 at 03:49, Peter Holm wrote:
> > > The system still freezes and can be unfrozen by a ping:
> > > http://www.holm.cc/stress/log/stephan.html
> > 
> > Could you try the sched_userret_patch in addition to the switch_patch?
> > ( Patch is in email to arch on 25 September with the subject
> > "sched_userret priority adjustment patch for sched_4bsd" 
> > 
> 
> Done.
> 
> > Are you running with the current GENERIC configuration?
> > ( If not could you send me your config file?)
> > 
> 
> Yes. GENERIC + BREAK_TO_DEBUGGER.  
> 
> > My debug target is currently diskless - I will reconfigure it later this
> > week and hopefully will be able to reproduce your freezes.
> > 
> > Thanks
> > 
> > 	Stephan 
> 
> Sorry for the late reply, but I ran into a few other problems along the way:

Late reply? !!!
What late reply?
Are you trying to scare me? ;-)

> http://www.holm.cc/stress/log/cons79.html
> http://www.holm.cc/stress/log/cons80.html
> 
> It's hard for me to tell if your patch has made any difference.
> The freeze is still there.  I'll try to make the same test once more
> without your patches to see if I get the same pattern in freezes.

I found some problems yesterday with mutex priority inheritance that
could potentially cause your freeze patterns.

I will try to roll a preliminary patch as soon as the caffeine does its
magic.


	Stephan