reason for "magic" crashes.
Wojciech Puchar
wojtek at wojtek.tensor.gdynia.pl
Sun Jun 24 18:50:39 UTC 2012
>>
>>
>> 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.
already did this part and debug part, but not DDB. As you see - hang not
crashdump
how much would it slow down whole thing?
If less than 2 times it can be - CPU are rerely half loaded
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