WITNESS & RELENG_6

[John Baldwin]

On Wednesday 03 January 2007 23:07, Kostik Belousov wrote:
> On Wed, Jan 03, 2007 at 04:01:04PM -0500, John Baldwin wrote:
> > On Wednesday 03 January 2007 09:18, Eugene Grosbein wrote:
> > > Hi!
> > > 
> > > I try to find bugs in 6.2-PRERELEASE by using it (q) :-)
> > > The question is: are kernel options WITNESS/WITNESS_KDB expected
> > > to be in usable kernel? I don't worry about performance overhead here.
> > > 
> > > The problem is, I've found this is nearly impossible to run
> > > my home system with RELENG_6 build from yesterday's sources,
> > > X.org 6.9.0, mplayer etc. without panicing and crashdump generation
> > > after an hour or so. Just switch from X to vty and logon gave me another
> > > LOR and crashdump. One of these you can see here:
> > > 
> > > http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/107455
> > > 
> > > Perhaps, I should not use these options for everyday STABLE use?
> > > 
> > > Eugene
> > 
> > I think you are running into devfs bugs actually.
> 
> I would suggest that the problem may be in the nvidia driver instead.
> It seems to be related to dev cloning.
> 
> Anyway, obtaining exact location of fault in devfs_populate_loop (either
> with crashdump/kgdb or manually) would be first step.

I know of at least one devfs cloning bug the nvidia driver ran into that phk@
verified is a bug in devfs, but I can't understand the patch well enough.  
I'll forward you the details.

-- 
John Baldwin