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Red Hat Linux 4: How to enable crash dump during panic

kenny chia
Regular Advisor

Red Hat Linux 4: How to enable crash dump during panic

Hi
I have a Red Hat ES4 system. Recently the system panic and it rebooted (By ASR). But unlike HP-UX systems there was no crash dump to be found.

How do I configure Linux to create a crash dump during Kernel Panic?

Thanks
All Your Bases Are Belong To Us!
6 REPLIES
Vitaly Karasik_1
Honored Contributor

Re: Red Hat Linux 4: How to enable crash dump during panic

Unfortunately, it is not trivial. But possible - see this articlehttp://www.redhatmagazine.com/2007/08/15/a-quick-overview-of-linux-kernel-crash-dump-analysis/
Heironimus
Honored Contributor

Re: Red Hat Linux 4: How to enable crash dump during panic

In addition to actual crash dump tools, Red Hat ships netconsole. You can use that to send kernel messages to another host. So far I've had better results with netconsole than with crash dumps, but most of my "crashes" haven't been OS crashes, they've been Oracle's hangcheck watchdog or HP's ASR.
skt_skt
Honored Contributor

Re: Red Hat Linux 4: How to enable crash dump during panic


Here is the link for setting up Sysrq:
http://kbase.redhat.com/faq/FAQ_80_5559.shtm

Here is the link for setting up Netdump:
http://kbase.redhat.com/faq/FAQ_43_2467.shtm

Please let us know if you need help setting these up.
kenny chia
Regular Advisor

Re: Red Hat Linux 4: How to enable crash dump during panic

Hi
I have check out netdump but unfortunately the broadcomm bcm5700 network driver cannot support this feature..
All Your Bases Are Belong To Us!
Vitaly Karasik_1
Honored Contributor

Re: Red Hat Linux 4: How to enable crash dump during panic

may be tg3 driver supports netdump?
kenny chia
Regular Advisor

Re: Red Hat Linux 4: How to enable crash dump during panic

hmmm..
I setup another server which is using the bcm5700 driver and crash it. It managed to dump data to the netdump server.
All Your Bases Are Belong To Us!