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Date:      Tue, 10 Nov 2009 09:15:42 -0800
From:      Mark Atkinson <atkin901@yahoo.com>
To:        freebsd-current@freebsd.org
Subject:   Re: 8.0RC2 amd64 - kernel panic running make buildworld
Message-ID:  <hdc73v$4rt$1@ger.gmane.org>
In-Reply-To: <4AF99D53.9030005@icyb.net.ua>
References:  <1031257439203@webmail57.yandex.ru>	<20091105184925.16b55c43@ernst.jennejohn.org>	<31221257446063@webmail71.yandex.ru>	<20091106101943.5a763f43@ernst.jennejohn.org>	<41361257585651@webmail39.yandex.ru>	<20091107115256.3df62bc3@ernst.jennejohn.org>	<1257618758.1511.14.camel@RabbitsDen>	<6511257846119@webmail85.yandex.ru>	<20091110105856.1270038e@ernst.jennejohn.org>	<1257864452.46072.25.camel@RabbitsDen>	<20091110162205.48abcffe@ernst.jennejohn.org> <4AF99D53.9030005@icyb.net.ua>

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Andriy Gapon wrote:
> on 10/11/2009 17:22 gary.jennejohn@freenet.de said the following:
>> Well, OK, I may have misinterpreted what you wrote or have chosen bad
>> wording myself to convey the same message.  Nonetheless it looks like
>> a hardware problem to me.
> 
> [Trying to make up for my previous mistake.]
> 
> The symptom certainly looks like misbehaving hardware, but other information from
> the reports seems to suggest that it is possible that this misbehavior might be
> caused by software misconfiguring the hardware.
> 
> I would re-test vm.pmap.pg_ps_enabled=0 just to be sure that it was correctly teh
> first time.
> I would try to see how 8.0-RC1 kernel behaves and in general try to find last
> working, first non-working version.
> It would be useful to know any (if any) non-default loader.conf and rc.conf
> settings or kernel config (if not GENERIC).
> 
> Not a trivial issue unless it is hardware indeed.
> 

Also, you can try adding:

hw.mca.enabled="1" in /boot/loader.conf, reboot,  and then see if there
is a machine check exception on the console during the buildworld.




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