WITNESS & RELENG_6

[Kostik Belousov]

On Thu, Jan 04, 2007 at 06:43:27PM +0700, Eugene Grosbein wrote:
> On Thu, Jan 04, 2007 at 01:02:08PM +0200, Kostik Belousov wrote:
> 
> > Hmm, it needs 1.198 as well. Below is aggregated patch against RELENG_6.
> > 
> > Index: kern_conf.c
> > ===================================================================
> > RCS file: /usr/local/arch/ncvs/src/sys/kern/kern_conf.c,v
> > retrieving revision 1.186.2.7
> > diff -u -r1.186.2.7 kern_conf.c
> > --- kern_conf.c	30 Oct 2006 15:43:56 -0000	1.186.2.7
> > +++ kern_conf.c	4 Jan 2007 10:59:33 -0000
> > @@ -676,16 +676,20 @@
> >  		dev->si_flags &= ~SI_CLONELIST;
> >  	}
> >  
> > +	dev->si_refcount++;	/* Avoid race with dev_rel() */
> >  	csw = dev->si_devsw;
> >  	dev->si_devsw = NULL;	/* already NULL for SI_ALIAS */
> >  	while (csw != NULL && csw->d_purge != NULL && dev->si_threadcount) {
> > -		printf("Purging %lu threads from %s\n",
> > -		    dev->si_threadcount, devtoname(dev));
> >  		csw->d_purge(dev);
> >  		msleep(csw, &devmtx, PRIBIO, "devprg", hz/10);
> > +		if (dev->si_threadcount)
> > +			printf("Still %lu threads in %s\n",
> > +			    dev->si_threadcount, devtoname(dev));
> > +	}
> > +	while (dev->si_threadcount != 0) {
> > +		/* Use unique dummy wait ident */
> > +		msleep(&csw, &devmtx, PRIBIO, "devdrn", hz / 10);
> >  	}
> > -	if (csw != NULL && csw->d_purge != NULL)
> > -		printf("All threads purged from %s\n", devtoname(dev));
> >  
> >  	dev->si_drv1 = 0;
> >  	dev->si_drv2 = 0;
> > @@ -700,6 +704,7 @@
> >  			fini_cdevsw(csw);
> >  	}
> >  	dev->si_flags &= ~SI_ALIAS;
> > +	dev->si_refcount--;	/* Avoid race with dev_rel() */
> >  
> >  	if (dev->si_refcount > 0) {
> >  		LIST_INSERT_HEAD(&dead_cdevsw.d_devs, dev, si_list);
> 
> I've tried. Now machine just hangs if I try to switch from X to vty.
> It stays in graphics mode locked.

Does it crash when exiting glxgears/some video player ?
When hangs, does it answer ping/allow ssh connections ?
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