> On Mon, May 16, 2005 at 06:40:01AM -0600, Elliot Finley wrote: > >The system freezes, but isn't totally dead. It'll still respond to pings, > >the screensaver still functions, but it won't respond to a CAD at the > >console. But if I press 'Enter' at the console, it'll give me a 'login:' > >prompt, but after entering the username, it never comes back with the > >'password:' prompt. > ... > >On my lightly loaded systems, it happens rarely. On my mailserver (fairly > >heavy disk load), it happens quite frequently. > > This could equally be a filesystem deadlock (race-to-root) rather than > something in the ATA controller. Do you know if it happens gradually > (starts with one or two non-responsive, unkillable processes and gets > worse until nothing happens)? > > >How can I troubleshoot this? > > Re-compile the kernel with: > options KDB > options DDB > makeoptions DEBUG=-g > and ensure you have a "dumpdev" in /etc/rc.conf. When you get a > lockup, drop to DDB (Ctrl-Alt-ESC) and run "show lockedvnods", "ps" > and "call doadump()". If you post the output (a serial console will > help here) someone might be able to provide more pointers. (The > crashdump will help with later debugging).
Had the system lock up again. This is with the new ATA mkIII patches on http://people.freebsd.org/~sos/ATA. I didn't get the crashdump (forgot to set dumpdev), but I did get 'ps' and 'show lockedvnods' output from DDB. The output is in the form of screenshots combined into a single .pdf which can be accessed here http://www.efinley.com/Binder1.pdf I hope this is helpful, I'll get a crashdump next time (probably tomorrow morning). Elliot _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"