topic Re: KERNEL PANIC !!!!!!!!!!! in Operating System - HP-UX

KERNEL PANIC !!!!!!!!!!!

PSS SYS ADMIN — Tue, 24 Sep 2002 14:20:11 GMT

Ahhhhhhhhrgh!
after a kernel rebuild my system goes in "panic: failed to allocate memory for buffer cache"
The problem is that the system could not boot with the /stand/vmunix.prev also!

HELP ME, PLEASE!

Re: KERNEL PANIC !!!!!!!!!!!

Paula J Frazer-Campbell — Tue, 24 Sep 2002 14:24:50 GMT

Dig out your make recovery (ignite tape - You do have one I presume and boot from that.

Vmuunix.prev should work thoug - do you see any memory errors on boot up?

Paula

Re: KERNEL PANIC !!!!!!!!!!!

Paula J Frazer-Campbell — Tue, 24 Sep 2002 14:26:24 GMT

Dig out your make recovery (ignite tape) - You do have one I presume and boot from that.

Vmuunix.prev should work though !!!!

- do you see any memory errors on boot up?

Paula

Re: KERNEL PANIC !!!!!!!!!!!

PSS SYS ADMIN — Tue, 24 Sep 2002 14:34:49 GMT

both vmunix and vmunix.prev did not work and I don't know why!

I have no make revory!

Re: KERNEL PANIC !!!!!!!!!!!

PSS SYS ADMIN — Tue, 24 Sep 2002 14:36:57 GMT

both vmunix and vmunix.prev did not work and I don't know why!

I have no make recovery but I have a twin system with identical hw & sw.
Do you think I can copy the kernel from it?

Re: KERNEL PANIC !!!!!!!!!!!

Shannon Petry — Tue, 24 Sep 2002 14:39:23 GMT

Your last booted kernel before the bad one was renamed to vmunix.prev after the new kernel was built. Unless you booted and deleted it it should still be there.

What errors does the old kernel give when you try to boot it?
What command are you giving from ISL to boot the old kernel?
What command EXACTLY is used to boot the current kernel from ISL default?

As for the new kernel, sounds like a typo or a value past physical limits in the buffer cash causing it to try and overallocate memory. This is why I said in your other thread I'd give no advice without the specifics of your system!

Kernels are tightly intwined with the resources on the system, and should not be modified unless you have you have 1) knowledge of the Kernel 2) knowledge of the system.

Regards,
Shannon

Re: KERNEL PANIC !!!!!!!!!!!

Sandip Ghosh — Tue, 24 Sep 2002 14:40:22 GMT

If you are having the identical system then create a make_recovery tape on that system (not full vg00) and restore that on this system. During recovery just put the correct IP add and host name.

Sandip

Re: KERNEL PANIC !!!!!!!!!!!

PSS SYS ADMIN — Tue, 24 Sep 2002 14:51:55 GMT

If use the make_tape_recovery of the twin system can I restore only the kernel?
And the vmunix it will go under the crashed system?

Re: KERNEL PANIC !!!!!!!!!!!

Shannon Petry — Tue, 24 Sep 2002 14:58:57 GMT

Nope, if you read the man page for make_recovery it makes a system image. If you use the tape it will overwrite your file system and all configuraiton files with the make_recovery image. You can NOT restore vmunix.

Regards,
Shannon

Re: KERNEL PANIC !!!!!!!!!!!

S.K. Chan — Tue, 24 Sep 2002 15:00:38 GMT

You may want to consider booting up from the Support Media and then rebuild your kernel. I have not done this before but the steps are here .. (DOCID=OZBEKBRC00000582)
http://www2.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000063236538
Hope this helps ..

Re: KERNEL PANIC !!!!!!!!!!!

PSS SYS ADMIN — Tue, 24 Sep 2002 16:03:00 GMT

I'm trying to boot from cd to recover the installation of the hpux.
During the recovery process at the point 4. I have this error:
ERROR : map_root_lv is not supported under this release of HP-UX
ERROR: not init and not in test mode

Re: KERNEL PANIC !!!!!!!!!!!

S.K. Chan — Tue, 24 Sep 2002 16:18:48 GMT

You sure you got the correct Install/Support CD ? Do you have another CD of either a later or earlier release. Try using that instead.

Re: KERNEL PANIC !!!!!!!!!!!

PSS SYS ADMIN — Tue, 24 Sep 2002 16:59:54 GMT

Thank you,
your document and your tip on the hpux install cd version help me to resume the host.

Regards...
PSS