MFC wishlist

[Steve Kargl]

On Sat, Jan 08, 2005 at 11:07:07AM +0800, Xin LI wrote:
> On Fri, Jan 07, 2005 at 04:55:40PM -0800, Steve Kargl wrote:
> > On Sat, Jan 08, 2005 at 01:11:40AM +0100, Ivan Voras wrote:
> > > It's been a while now and (judging from this list at least), people are 
> > > not complaining about ULE, so maybe (with re@ approval) the fix & 
> > > supporting infrastructure could be brought to RELENG_5?
> > > 
> > 
> > That's not a good idea.  I can lock up ULE+PREEMPTION on
> > a dual amd64 system within 30 minutes.  The system is
> > runnnig X11 and normally firefox (or other threaded
> > app) and it simply freezes.  No panic.  No keyboard
> > response.  Nothing.  
> 
> This is observed in pre-5.3RELEASE CURRENT, but I thought Jeff has
> already fixed it in -CURRENT.  I don't have dual amd64 system to do
> such experiments, are you sure you are talking about the latest
> 6-CURRENT, or just 5.3?
> 

Yes, I'm talking about 6-CURRENT.  My last kernel/world build is
04 Jan 05.  I can only invoke the problem with X11 running, and
I currently don't have a serial console on this system.  I'm
guessing that I hit a deadlock (or livelock).

-- 
Steve