Re: a panic on uart_z8530_class?

On Sat, May 08, 2010 at 09:59:23PM -0500, Brandon Gooch wrote:
> On Sat, May 8, 2010 at 3:35 PM, ben wilber <ben_at_desync.com> wrote:
> > On Sat, May 08, 2010 at 04:11:49PM -0400, Benjamin Kaduk wrote:
> >> > [root_at_test ~]# kgdb /boot/kernel/kernel /var/crash/vmcore.1
> >> > GNU gdb 6.1.1 [FreeBSD]
> >> > Copyright 2004 Free Software Foundation, Inc.
> >> > GDB is free software, covered by the GNU General Public License, and you are
> >> > welcome to change it and/or distribute copies of it under certain conditions.
> >> > Type "show copying" to see the conditions.
> >> > There is absolutely no warranty for GDB.  Type "show warranty" for details.
> >> > This GDB was configured as "amd64-marcel-freebsd"...
> >> > Cannot access memory at address 0xffffff0127ffffe0
> >> > (kgdb) bt
> >> > #0  0x0000000000000000 in ?? ()
> >> > Cannot access memory at address 0x0
> >> > (kgdb) q
> >>
> >>
> >> I have seen this behavior from kgdb --- it doesn't seem to be able to
> >> handle coredumps I've made recently.  At first I thought that I managed to
> >> trash either my kernel image or kgdb binary with all the unclean
> >> shutdowns I've been having, but if you're seeing kgdb failures, maybe it's
> >> not just my local system.
> >>
> >> Yet I am assuming that this is not broken for *everyone*, or we would have
> >> heard more noise about it.
> >>
> >> I'm running a current snapshot from April 4th; maybe I will try updating
> >> to a new snapshot tonight and see if kgdb behaves better after everything
> >> is rebuilt.
> >
> > Same here, for the last couple months maybe.
> 
> I'll chime in here with a "me too".
> 
> Since at early April, I've been trying to figure out why my laptop
> locks up overnight (something about the CPUs going into C3). I can
> nearly always get it to coredump, but the vmcore files I generate are
> unusable...
> 
> -Brandon

Just another "me too". May be we have something common in our setup?
(I'm dumping to /dev/gpt/swap 8Gb GPT partition, using ahci(4) on a ATI
IXP700 AHCI SATA controller).

Another issue - dump is written extremely slow (1.5Gb in ~5 minutes).


Yuri