Date: Wed, 9 May 2001 15:35:33 -0700 From: "Brian O'Shea" <boshea@ricochet.net> To: vishwanath pargaonkar <vishubp@yahoo.com> Cc: freebsd-questions@FreeBSD.ORG, boshea@ricochet.net Subject: Re: how shd i crash dump kernel Message-ID: <20010509153533.I1813@shaolin.hq.netapp.com> In-Reply-To: <20010509070024.24670.qmail@web5304.mail.yahoo.com>; from vishubp@yahoo.com on Wed, May 09, 2001 at 08:00:24AM %2B0100 References: <20010509070024.24670.qmail@web5304.mail.yahoo.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Vishwanath, What you did is correct. Unfortunately, you need to have a dump device configured before your system panics. If it is not configured at the time of a panic, no crash dump is saved. The only thing you can do now is hope that the problem happens again. You might be able to help this along by attempting to re-create the situation that caused the panic in the first place. Do you remember what you were doing on this system when the panic occurred? Can you cause it to happen again? If you can reproduce this problem easily, you should try building a debug kernel. This will provide even more debugging information about the problem, if it happens again. Instructions on how to do this can be found in the handbook: http://www.freebsd.org/doc/en_US.ISO_8859-1/books/handbook/kerneldebug.html -brian On Wed, May 09, 2001 at 08:00:24AM +0100, vishwanath pargaonkar wrote: > Hi, > i have freebsd 4.2 release. > i installed my changed new kernel(with modifications > in source). > since it had problem it crashed at begining saying > panic page fault etc.. > now i want to debug this kernel. > so i enabled dumpdev = my swap partition in > /etc/rc.conf . and rebooted. > this time i started my original working kernel in > single user mode. and then gave > savecore -N /kernel.that.panicked /var/crash. > but this said no core. > y is this? tell me how shd i make my kernel to dump > core so that i analyse it. > > tell me if procedure i followed was right? > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-hackers" in the body of the message > -- Brian O'Shea <boshea@ricochet.net> To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20010509153533.I1813>