On Sun, Jun 24, 2012 at 07:05:35PM +0200, Wojciech Puchar wrote: > i've got third crash third week in a row. > > Every time in sunday after 18:00, every time with rsync process > (which means rsync based backup that is done every day, not just in > sunday!), > > you may see a crash (viewed from KVM) at > > http://www.tensor.gdynia.pl/~wojtek/crash.png > > what is important - syncing disk doesn't go on, system hangs here. > > For 99% system is not overheating at sunday, but i will be 100% sure > as i added ipmitool sensor logged from cron every 5 minutes. > > Please give me an idea what to check. > > > There is nothing in cron that is done at sunday. > > i don't run "periodic" stuff in /etc/crontab >
Compile the kernel with the following: makeoptions DEBUG="-O0 -g" options KDB # Enable kernel debugger support. options DDB # Support DDB. options GDB # Support remote GDB. options DEADLKRES # Enable the deadlock resolver options INVARIANTS # Enable calls of extra sanity checking options INVARIANT_SUPPORT # Extra sanity checks of internal structures, required by INVARIANTS options WITNESS # Enable checks to detect deadlocks and cycles options WITNESS_SKIPSPIN # Don't run witness on spinlocks for speed options DIAGNOSTIC After kernel panic ddb prompt will be waiting for you. Type in: dump <enter> reset <enter> Make sure you have swap that can handle crashdumps. See this for more details: http://www.freebsd.org/doc/en/books/developers-handbook/kerneldebug.html You can check if everything works correctly by issuing panic manually: sysctl debug.kdb.panic=1 then typing aforementioned ddb commands. After reboot you should get core in /var/crash. Also provide the following: - system version - filesystems involved in rsync with mount details (e.g. UFS with SU+J) - dmesg Hopefully this will be enough for someone to help. -- Mateusz Guzik <mjguzik gmail.com> _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"