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From: Eugene Grosbein <egrosbein@rdtc.ru>
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Cc: freebsd-net@freebsd.org, Andriy Gapon <avg@icyb.net.ua>
Subject: Re: mpd5/Netgraph issues after upgrading to 7.4
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15.06.2012 18:50, Eugene Grosbein пишет:

>> unfortunately, one of my mpd5 PPPoE access servers started panicing every few
>> hours.
>>
>> I'm running recent 8.3-STABLE (as of 23th May) with WITNESS, INVARIANTS and
>> DEBUG_MEMGUARD compiled. Unfortunately, I'm unable to catch crashdump. For some
>> reason, it is not saved on dumpdev.
> 
> The reason is that 8-STABLE fails to stop scheduler on panic
> that breaks writing of crashdumps.
> 
> 8.3-STABLE has new sysctl kern.stop_scheduler_on_panic.
> You should set it to 1 to get crashdumps saved.
> 
> One more: does your box has PS/2 keyboard or USB? It matters too.
> For systems having USB keyboard there is another patch needed to obtain
> crashdumps (by Andriy Gapon):
> 
> http://www.kuzbass.ru/freebsd/patches/stop_scheduler_on_panic.usb.diff

Sorry, right URL is: http://www.grosbein.net/freebsd/patches/stop_scheduler_on_panic.usb.diff

Eugene Grosbein