Date: Mon, 2 Aug 2004 22:04:31 -0400 From: Garance A Drosihn <drosih@rpi.edu> To: freebsd-sparc64@freebsd.org Subject: Odd problem with ofw_console on Ultra-10 Message-ID: <p06110445bd349a98b7c3@[128.113.24.47]> In-Reply-To: <p06110423bd2463beab4e@[128.113.24.47]> References: <p06110423bd2463beab4e@[128.113.24.47]>
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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.
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
Log:
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@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 .
--
Garance Alistair Drosehn = gad@gilead.netel.rpi.edu
Senior Systems Programmer or gad@freebsd.org
Rensselaer Polytechnic Institute or drosih@rpi.edu
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