Date: Sat, 16 Sep 2006 22:42:56 -0400 From: John Baldwin <jhb@freebsd.org> To: Frode Nordahl <frode@nordahl.net> Cc: freebsd-stable@freebsd.org Subject: Re: RELENG_6 Livelock Message-ID: <200609162242.56480.jhb@freebsd.org> In-Reply-To: <5D255995-5E67-4D21-88A5-54A8385C4935@nordahl.net> References: <FC17EAA4-B5B1-48E4-BA69-1D8EF4E0F047@nordahl.net> <BF9D335C-8A6D-4B32-B65C-FAB003778DA7@nordahl.net> <5D255995-5E67-4D21-88A5-54A8385C4935@nordahl.net>
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On Saturday 16 September 2006 16:55, Frode Nordahl wrote: > On 16. sep. 2006, at 22.22, Frode Nordahl wrote: > > > On 16. sep. 2006, at 22.09, John Baldwin wrote: > > > >> On Saturday 16 September 2006 07:02, Frode Nordahl wrote: > >>> Hello, > >>> > >>> FreeBSD localhost.localdomain 6.2-PRERELEASE FreeBSD 6.2-PRERELEASE > >>> #1: Wed Sep 13 00:10:04 CEST 2006 frode@localhost.localdomain:/ > >>> usr/obj/usr/src/sys/PT i386 > >>> > >>> After running some stress tests for 3 days, I wanted to remove some > >>> large directories. > >> > >> Do you have a coredump? I assume you do from your debug output. Can > >> you download http://www.FreeBSD.org/~jhb/gdb/gdb6, fire up kgdb, and > >> once in kgdb, do 'source /path/to/gdb6' and then run 'ps' and reply > >> with the output from that? > > > > I am sorry, I have not. I tried to call doadump, but there was no > > dumpdevice configured :-( > > > > Somehow I have convinced myself that this was turned on by default > > now, so I have not enabled it explicitly in rc.conf. Is there any > > way to tell DDB what dumpdevice to use directly? > > > > I will configure a dumpdevice and try really hard to make it happen > > again. > > I was able to reproduce the livelock again, and this time I had the > system armed with dumpon :-) > > Here is the output you requested: > (kgdb) ps > pid ppid pgrp uid state wmesg wchan cmd > 2535 2499 2535 0 R+ CPU 0 rm > 2534 2499 2534 0 L+ *Giant 0xc6704580 rm > 2533 2499 2533 0 L+ *Giant 0xc6704580 rm > 2532 2499 2532 0 R+ rm > 2531 2499 2531 0 L+ *Giant 0xc6704580 rm > 2499 2496 2499 0 Ss+ ttyin 0xc655d810 bash > 2496 784 2496 0 Rs sshd Ok, do 'lockchain 2534' in kgdb (with gdb6 sourced) and let me see the output from that. -- John Baldwin
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