Odd problem with ofw_console on Ultra-10
yongari at kt-is.co.kr
Mon Aug 2 20:07:35 PDT 2004
On Mon, Aug 02, 2004 at 10:04:31PM -0400, Garance A Drosihn wrote:
> Back on July 21/2004,
> in the thread "Installworld problem on sparc64?"
> I (Garance) wrote:
> >I did a buildworld/buildkernel/installkernel yesterday, and it
> >seemed to work fine. I then went to reboot, to do the installworld.
> >If I try to boot in single-user mode, the startup process hangs
> >right after: Mounting root from ufs:/dev/ad0a
> >If I just boot up normally (not bothering with single-user), it
> >comes up fine. The line that shows up after "Mounting root" is:
> > Pre-seeding PRNG: kickstart.
> >So I do the normal boot-up, and then type `shutdown' to get into
> >single-user mode. Again the machine hangs. I have to power-off
> >and back on to get it's attention.
> >Eventually I booted up multi-user, just killed a few daemons,
> >and ran installworld. That seems to have gone okay. I was able
> >to reboot after doing the installworld, and it comes up pretty
> >much okay (a few minor messages from ntpd, but otherwise nothing
> >seems unusual). A `shutdown -r' also works fine. However, if I
> >try to do a plain 'shutdown now', the machine again hangs. It
> >stops after writing out:
> > Stopping cron.
> > Shutting down local daemons:.
> > Writing entropy file:.
> > Terminated
> > .
> >and never comes up asking me for which shell I want to run (where
> >/bin/sh would be the default). Also, now that I have completely
> >upgraded, I still can not seem to boot in single-user mode, as I
> >described above.
> >My install is working off the regular console (keyboard/monitor
> >setup), not a serial-console setup, on an Ultra-10.
Me too. I hate serial cable...
> From the onslaught of replies to this (aka "Zero"), I assume I am
> still the only person seeing this. Well, I still do not quite
> understand all the details of the problem. But after much time,
> several blind alleys, and many buildworlds later, I have narrowed
> it down to the following commit:
> obrien 2004-06-24 02:57:12 UTC
> FreeBSD src repository
> Better OFW console support on Sun Ultra2 machines.
> Ultra2 users may want to set OFWCONS_POLL_HZ to a value of '20'.
> I have left default value at '4' as higher values can consume
> a more than is acceptable amount of CPU, and we don't have a
> consensus yet what is an optimal value.
> Submitted by: Pyun YongHyeon <yongari at kt-is.co.kr>
> Revision Changes Path
> 1.11 +1 -0 src/sys/conf/options.sparc64
> 1.25 +17 -9 src/sys/dev/ofw/ofw_console.c
> 1.7 +2 -0 src/sys/sparc64/conf/NOTES
> If I take my non-working system, and backout revision 1.25 of
> ofw_console.c, then it goes back to working fine in single-user
> mode. Before doing that, I also tried adding the line:
> option OFWCONS_POLL_HZ=30 # 20 or more works best on Ultra2
> (to increase it up from the default of '4'), but that didn't
> seem to do any good. I suspect my main problem is that I run
> my ultra-10 from a regular keyboard/console, while everyone else
> seems to be doing it via a serial console.
> Now that I think I have a way around the single-user problem, I'm
> going to try to bring my system up-to-date (minus the above change),
> and see how well that works. That'll take me another day, though...
> There is much about the behavior I see from this bug which does
> not make sense to me. Given the behavior I see, real issue might
> be something pretty simple. Like maybe something that needs to be
> reset in /sbin/init .
Here is untested patch(copy & pasted). I thought Peter Grehan already
committed it since it also breaks powerpc console.
Rebuilding new kernel now and let you know the result.
--- ofw_console.c.orig Tue Aug 3 12:02:15 2004
+++ ofw_console.c Tue Aug 3 11:54:27 2004
@@ -129,7 +129,7 @@
tp->t_iflag = TTYDEF_IFLAG;
tp->t_oflag = TTYDEF_OFLAG;
- tp->t_cflag = TTYDEF_CFLAG;
+ tp->t_cflag = TTYDEF_CFLAG | CLOCAL;
tp->t_lflag = TTYDEF_LFLAG;
tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
> Garance Alistair Drosehn = gad at gilead.netel.rpi.edu
> Senior Systems Programmer or gad at freebsd.org
> Rensselaer Polytechnic Institute or drosih at rpi.edu
Pyun YongHyeon <http://www.kr.freebsd.org/~yongari>
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