Date: Sat, 10 Mar 2007 16:49:21 +0100 From: "Attilio Rao" <attilio@freebsd.org> To: "Tillman Hodgson" <tillman@seekingfire.com> Cc: freebsd-current@freebsd.org Subject: Re: Experiencing hangs on SMP box with no console messages given for clues. Details inside. Message-ID: <3bbf2fe10703100749h14e9b075wb6d730ed7c9189f8@mail.gmail.com> In-Reply-To: <20070310153206.GF1230@seekingfire.com> References: <20070308125927.GA1265@seekingfire.com> <20070308204041.GA55240@xor.obsecurity.org> <20070310153206.GF1230@seekingfire.com>
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2007/3/10, Tillman Hodgson <tillman@seekingfire.com>: > On Thu, Mar 08, 2007 at 03:40:41PM -0500, Kris Kennaway wrote: > > On Thu, Mar 08, 2007 at 06:59:27AM -0600, Tillman Hodgson wrote: > > > Howdy folks, > > > > > > These has been happening every few days for a few weeks now. When it > > > occurs, there's no messages logged to the console or to syslog -- it > > > just silently hangs. I added the break-to-debugger option so that I can > > > at least reboot it remotely via the serial console. > > > > > > I've been following the -current kernel fairly closely in hopes that it > > > was just due to a transitory -current problem. I don't mind rebuilding a > > > kernel with special options if it's useful -- I'll be rebuilding this > > > morning with WITNESS and INVARIANTS for sure. > > > > Let us know when you have the corresponding debugging. > > [root@athena /usr/src/sys/i386/conf]# diff ATHENA GENERIC > 24c24 > < ident ATHENA > --- > > ident GENERIC > 71,73d70 > < > < ### Tillman added 26Feb07 as per http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/serialconsole-setup.html > < options BREAK_TO_DEBUGGER > > Ran a kernel from backdated src (Feb 22) on a suggestion from Paolo, > hang occurred within 24 hours (eliminating that particular commit). I > have the core saved to work with and I'm now rebuilding a March 10 > kernel. > > I'm trying to follow the instructions at > http://www.freebsd.org/doc/en_US.ISO8859-1/books/faq/advanced.html#KERNEL-PANIC-TROUBLESHOOTING > and in > http://www.onlamp.com/pub/a/bsd/2002/04/04/Big_Scary_Daemons.html?page=1 > but I'm running into an issue even getting gdb to start: > > [root@athena /var/crash]# which gdb > /usr/bin/gdb > [root@athena /var/crash]# gdb -k > gdb: unrecognized option `-k' > Use `gdb --help' for a complete list of options. > > The man page doesn't list a -k option either. /usr/src/UPDATING doesn't > seem to mention any gdb changes. man kgdb Attilio -- Peace can only be achieved by understanding - A. Einstein
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