7.1-PRERELEASE freezes

Jeremy Chadwick koitsu at FreeBSD.org
Sat Sep 27 02:50:20 UTC 2008

On Fri, Sep 26, 2008 at 06:21:01PM +0200, Christian Laursen wrote:
> I decided to give 7.1-PRERELEASE a try on one of my machines to find
> out if there might be any problems I should be aware of.
> I quickly ran into problems. After a while the system freezes
> completely. It seems to be somehow related to the load of the machine
> as it doesn't seem to happen when it is idle. I built a kernel with
> software watchdog enabled and enabled watchdog which had the nice
> effect of turning the freeze into a panic. Hopefully that will be of
> some help.
> I first encountered the problem using SCHED_ULE and then tried if
> SCHED_4BSD made any difference. But the freeze happens with either
> scheduler.
> I have disabled xorg and the nvidia driver but that doesn't help
> either. I can cut down on various other stuff too, but first I hope
> that someone here have a more educated guess about what could be the
> cause of the freezes.
> I have placed the backtraces from the most recent crashes as well as
> the demsg output from the most recent boot at this URL:
> http://borderworlds.dk/~xi/7.1-PRERELEASE.freeze.txt
> My kernel config is also included.
> #0  doadump () at pcpu.h:196
> #1  0xc05abd03 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:418
> #2  0xc05abeff in panic (fmt=Variable "fmt" is not available.) at /usr/src/sys/kern/kern_shutdown.c:572
> #3  0xc0570d18 in hardclock (usermode=0, pc=3231434181) at /usr/src/sys/kern/kern_clock.c:642
> #4  0xc07d194f in clkintr (frame=0xe38e1c68) at /usr/src/sys/i386/isa/clock.c:164
> #5  0xc07c0465 in intr_execute_handlers (isrc=0xc0866700, frame=0xe38e1c68) at /usr/src/sys/i386/i386/intr_machdep.c:366
> #6  0xc07d0fa8 in atpic_handle_intr (vector=0, frame=0xe38e1c68) at /usr/src/sys/i386/isa/atpic.c:596
> #7  0xc07bbf41 in Xatpic_intr0 () at atpic_vector.s:62
> #8  0xc09bc5c5 in acpi_cpu_c1 () at /usr/src/sys/modules/acpi/acpi/../../../i386/acpica/acpi_machdep.c:550
> #9  0xc09b54f4 in acpi_cpu_idle () at /usr/src/sys/modules/acpi/acpi/../../../dev/acpica/acpi_cpu.c:945
> #10 0xc07c35b6 in cpu_idle () at /usr/src/sys/i386/i386/machdep.c:1183
> #11 0xc05c9275 in sched_idletd (dummy=0x0) at /usr/src/sys/kern/sched_4bsd.c:1429
> #12 0xc05895d6 in fork_exit (callout=0xc05c9260 <sched_idletd>, arg=0x0, frame=0xe38e1d38) at /usr/src/sys/kern/kern_fork.c:804
> #13 0xc07bbf10 in fork_trampoline () at /usr/src/sys/i386/i386/exception.s:264

A couple generic things, although I think jhb@ might be able to figure
out what's going on here:

1) Is this machine running the latest BIOS available?
2) Are you running powerd(8) on this box?
3) Does disabling ACPI (it's a menu option when booting) help?
4) Does removing "device cpufreq" help?

| Jeremy Chadwick                                jdc at parodius.com |
| Parodius Networking                       http://www.parodius.com/ |
| UNIX Systems Administrator                  Mountain View, CA, USA |
| Making life hard for others since 1977.              PGP: 4BD6C0CB |

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