> 	Could you try commenting out
> 		xm.xm_mode |= PERIPH_CAP_TQING
> 	in (I think)
> 		/sys/dev/ic/ncr53c9x.c

David,

Turning off TQING here has indeed resolved the hangs for me on
the Sparc 10.  Thanks.

Let me know if I can help debug and modifications to try to get
Tagged queueing working on the Sparc 5 or 10 for you.

Regards,
-scott

> 
> -- 
> 		David/absolute		-- www.netbsd.org: No hype required --
> 
> 
> On Tue, 19 Jun 2001, Jim Bernard wrote:
> 
> > On Tue, Jun 19, 2001 at 04:53:20PM -0500, NetBSD list wrote:
> > > cvs versions beyond 1.5V of the NetBSD kernel hang on my Sparc 10.
> > >
> > > The last working kernel I have is:
> > > NetBSD dudley 1.5V NetBSD 1.5V (MRYSPARC) #3: Tue May 15 14:58:39 CDT 2001     root@dudley:/usr/src/sys/arch/sparc/compile/MRYSPARC sparc
> > >
> > > Since sometime after that date, disk activity will hang (I'm guessing)
> > > the SCSI bus.  A typical way I can cause this to happen is by cvs'ing
> > > the source tree.  In about 5 seconds, the machine stops all disk access.
> > > No errors are produced.  Sessions continue to echo characters, but no
> > > commands are executed.  It's just off in la-la land (much as I often
> > > aspire to be).
> > >
> > > Anyone else having such an issue?  I've cleared out /usr/src many
> > > times in the last month since then and started over, but the problem
> > > persists here.  The kernel I'm running is GENERIC modified for 128 users.
> > >
> > > Please help guide me in tracking this down if possible.  Meanwhile,
> > > the 1.5V is working fine with the latest cvs userland.  Help with
> > > the kernel debugger would be nice, as I'm not familiar with debugging
> > > NetBSD kernels.
> >
> >   Same here, also on a sparc 20.  With recent kernels I occasionally see
> > scsi parity errors on one disk (can't seem to find a real hardware fault,
> > though), and eventually the system just hangs.  Some things continue to
> > work for a while after others stop working (logins via ssh seem to be one
> > of the first to go, while sendmail continues to work much longer).  I also
> > found that if I happened to be logged in while it was in this state,
> > it would eventually just not execute commands, and after a bit more time
> > even window focus changes would stop working.  The last working kernel
> > I have is 1.5U from mid April.  The first one on which I observed the
> > failure was 1.5V from May 29.  Unfortunately, that's all the info I
> > have on the problem so far.
> >
> >   BTW: I noticed that the most recent working kernel shows tagged queuing
> > rejected on all the disks, e.g.:
> >
> > sd0 at scsibus0 target 0 lun 0: <SEAGATE, ST34555N, 0930> SCSI2 0/direct fixed
> > sd0(esp0:0:0): max sync rate 10.00MB/s
> > esp0: tagged queuing rejected: target 0
> >
> > whereas the problematic kernel I built June 16 shows it enabled:
> >
> > sd0 at scsibus0 target 0 lun 0: <SEAGATE, ST34555N, 0930> SCSI2 0/direct fixed
> > sd0: 4340 MB, 6300 cyl, 8 head, 176 sec, 512 bytes/sect x 8888924 sectors
> > sd0: sync (100.0ns offset 15), 8-bit (10.000MB/s) transfers, tagged queueing
> >
> > I don't know whether this is related to the problem.
> >
> > --Jim
> >
>