FreeBSD8-RELENG (sources from this morning) deadlock
Gavin Atkinson
gavin at FreeBSD.org
Sat Oct 3 13:24:16 UTC 2009
On Fri, 2 Oct 2009, Ted Faber wrote:
> On Mon, Sep 28, 2009 at 09:14:07PM -0700, Ted Faber wrote:
>> I've been havinhard time getting this motherboard to work under FreeBSD
>> 8.0. It comes up fairly fine (though I didn't get the PATA disk
>> identified under 7-STABLE so it may also be shaky under 8), but after
>> between 3 and 10 minutes of running multi user it locks up hard, and
>> wont respond to input at all. No keyboard response, couldn't get into a
>> kernel debugger, nothing. I couldn't get a kernel dump for that reason.
>
> I'm still deadlocked, but trying to get more info. I tried a firewire
> debugging session using dcons, but that failed for reasons unclear.
> dconschat seems to do the right thing:
>
> ---
> musicbox:~$ sudo dconschat -v âbr âG 12345 ât 00-00-4c-01-00-00-3b-c7
> dconschat: kvm_nlist: No such file or directory
> dcons_buf: 0xc0d74740
> port 0 size offset gen pos
> output: 9184 56 1 1550
> input : 3062 9240 0 106
> port 1 size offset gen pos
> output: 3061 12302 0 0
> input : 1021 15363 0 0
> [dcons connected]
> (1)(1)(1)(1)(1)
> ---
>
> But the gdb fails to connect:
>
> ----
> musicbox:~$ kgdb kernel
> 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 "i386-marcel-freebsd"...(no debugging symbols found)...
> (kgdb) target remote :12345
> :12345: Connection refused.
> ----
Do you have options GDB/DDB/KDB in your kernel?
Gavin
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