07.11.09, 13:32, "Alexandre \"Sunny\" Kovalenko" <gaijin.k_at_gmail.com> wrote: > Sergey, I think it would be best if you follow > http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug.html#KERNELDEBUG-OBTAIN > and the do an ultimate test: > * quiesce your system > * switch to the console > * sync (few times, if you are really old school ;) > * sysctl debug.kdb.panic=1 (this would *panic* the system and, given > everything is set-up properly, produce the crash dump) > > if you do not have debug.kdb.panic sysctl, please, add option KDB to > your kernel configuration. > If you get crash dump from the kernel-induced panic and your system > keeps rebooting without a trace, I would suspect some hardware testing > might be in order. Alexandre, I followed your tips. The kernel configuration now contains options DDB and KDB. The sysctl variable 'debug.debugger_on_panic' is set to '1'. After the 'sysctl debug.kdb.panic=1' command the debugger prompt appears. To have a crash dump I should type 'panic' on the debugger prompt. If I type 'reboot' instead, there are no crash dumps. Is that behaviour correct? Another question: must all panics go to the bebugger prompt? I still have neither crash dumps nor debugger prompt during world/kernel compilations. Just reboots. -- Regards, S.Grigoriev.Received on Tue Nov 10 2009 - 08:42:03 UTC
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