XFree86 process gets stuck in *Giant

[Glenn Johnson]

On Tue, May 20, 2003 at 11:30:41AM -0700, Steve Kargl wrote:

> On Tue, May 20, 2003 at 01:02:59PM -0500, Glenn Johnson wrote:
>
> > I have had this happen a couple of times since running -CURRENT
> > (since about the days of 5.0-RELEASE).  My machine (an SMP box)
> > will be non-responsive, no graphics, no ability to use the mouse
> > or keyboard.  Upon logging into another machine and using ssh to
> > connect to the hung machine, I can login to it, albeit very slowly.
> > Upon running 'top' I see that the XFree86 process is stuck in *Giant
> > and using > 100% of the CPU (according to top).
> >
> > The only way out is a reboot because if I kill the XFree86 process  
> > the machine will completely die.  Has anyone else seen this?  Is    
> > there something I can do to prevent it from happening?              
>
>
> Which scheduler are you using?  ULE (supposely) has issues with SMP.

I am using the 4BSD scheduler.  By the way, the machine is a dual
AthlonMP-2400+ with a Matrox 550 graphics card (DRI enabled).  This
behavior happened most recently with a -CURRENT from May 16, 2003.

I put FreeBSD-5 on this machine back in March.  This "event" has
happened twice in two months so it is relatively rare.

-- 
Glenn Johnson
USDA, ARS, SRRC			 Phone: (504) 286-4252
New Orleans, LA 70124		e-mail: gjohnson at srrc.ars.usda.gov