Re: Kernel panic

On Tue, 19 Sep 2023 15:23:25 +0200
Luciano Mannucci <luciano@vespaperitivo.it> wrote:

> This morning one of my freeBSD production machine did crash. Beeing a
> VM running under qemu/kvm on an ubuntu linux hardware, I was unable to
> get the panic video message issued when the machine crashed. Of course
> at the reboot I got a vmcore file in /var/crash, along with core.txt
> and info. The file core.txt says:
> 
> Unable to find a kernel debugger.
> Please install the devel/gdb port or gdb package.
> 
> while the info file is:
> 
> Dump header from device: /dev/vtbd0s2b
>   Architecture: powerpc64
>   Architecture Version: 1
>   Dump Length: 865083392
>   Blocksize: 512
>   Compression: none
>   Dumptime: 2023-09-19 09:04:31 +0200
>   Hostname: numeron
>   Magic: FreeBSD Kernel Dump
>   Version String: FreeBSD 13.1-RELEASE-p5
> releng/13.1-n250174-753d65a19a55 GENERIC Panic String: data storage
> interrupt trap Dump Parity: 907562729
>   Bounds: 1
>   Dump Status: good
> 
> what shoukd I do to know what did kill my machine?
> 
> Thanks to all,
> 
> Luciano.

Install the gdb package, then run kgdb on the core as:

kgdb -c /var/crash/vmcore.0

- Justin