Date: Tue, 10 Nov 2009 10:58:56 +0100 From: Gary Jennejohn <gary.jennejohn@freenet.de> To: S.N.Grigoriev <serguey-grigoriev@yandex.ru> Cc: freebsd-current@freebsd.org, "Alexandre \"Sunny\" Kovalenko" <gaijin.k@gmail.com> Subject: Re: 8.0RC2 amd64 - kernel panic running make buildworld Message-ID: <20091110105856.1270038e@ernst.jennejohn.org> In-Reply-To: <6511257846119@webmail85.yandex.ru> 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>
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On Tue, 10 Nov 2009 12:41:59 +0300 S.N.Grigoriev <serguey-grigoriev@yandex.ru> wrote: > 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? > In this case yes, because you forced the panic by setting the sysctl. > Another question: must all panics go to the bebugger prompt? > They should, if the kernel itself causes the panic. As Alexandre wrote, a hardware problem probably would not cause a kernel panic. I've seen panics like this myself and they were almost always caused by faulty memory. Running "make buildworld" really stresses the system and reveals hardware faults like that. > I still have neither crash dumps nor debugger prompt during > world/kernel compilations. Just reboots. > Are you in the console or running Xorg when it happens? --- Gary Jennejohn
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