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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