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Date:      Mon, 18 Jun 2012 11:47:20 +0700
From:      Eugene Grosbein <egrosbein@rdtc.ru>
To:        Arnaud Lacombe <lacombar@gmail.com>
Cc:        Przemyslaw Frasunek <venglin@freebsd.lublin.pl>, Andriy Gapon <avg@icyb.net.ua>, freebsd-net@freebsd.org
Subject:   Re: mpd5/Netgraph issues after upgrading to 7.4
Message-ID:  <4FDEB2D8.40007@rdtc.ru>
In-Reply-To: <CACqU3MW542ZvwMTOssfA7RE4o3jLT9ajD3oUAQWHo=xH0=wcoQ@mail.gmail.com>
References:  <4DAD3824.7000500@frasunek.com>	<20110419074056.GG34767@glebius.int.ru>	<4DB47CE1.8@frasunek.com>	<4DB487D2.7030104@rdtc.ru>	<4DB48B76.8050101@frasunek.com>	<4DB49109.3050002@frasunek.com>	<20110425050548.GF34767@glebius.int.ru>	<4DBBBAD8.2000705@frasunek.com>	<20110513162311.GK95084@glebius.int.ru>	<4DD298AD.2060905@frasunek.com>	<20110517184613.GN74366@glebius.int.ru>	<4FDB1D71.6050908@freebsd.lublin.pl>	<4FDB2180.4030609@rdtc.ru> <CACqU3MW542ZvwMTOssfA7RE4o3jLT9ajD3oUAQWHo=xH0=wcoQ@mail.gmail.com>

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17.06.2012 01:13, Arnaud Lacombe пишет:
> Hi,
> 
> On Fri, Jun 15, 2012 at 7:50 AM, Eugene Grosbein <egrosbein@rdtc.ru> wrote:
>> 15.06.2012 18:33, Przemyslaw Frasunek пишет:
>>> Dear All,
>>>
>>> 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.
>>
> Is there technical reason to have the scheduler still running after panic() ?

It seems no. That's just "a misfeature".

Eugene Grosbein



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