Re: Kernel panic in 5.99.24

[Paul Goyette <paul%whooppee.com@localhost>]

I've got a couple of amd64 boxes running.  One of them has had no 
problems with crash dumps, and the dumps have come in handy to debug 
with gdb.

On the other hand, the other box tries to dump, and appears to succeed 
with the core.  But upon a reboot, after savecore(8) copies the dump to 
/var/crash, it seems to fail with writing the kernel image.  The kernel 
file in /var/crash is always zero bytes long!

And, even if I specify some other copy of the kernel, the dump itself 
seems unusable.  gdb cannot process it.


On Fri, 29 Jan 2010, Martti Kuparinen wrote:

> Should kernel crash dumps work on amd64? I remember having no problems when I 
> was using i386 but that was 2 or 3 years ago...
>
> I caused another panic and the host wrote a crash dump (all those numbers 
> running down from 4xxx to 1 finished with "success" or "succeeded") but when 
> the host boot, it says
>
> Checking for crash dump...
> savecore - - - no core dump
>
> I have this kind of fstab
>
> /dev/wd0a       /               ffs     rw,log          1 1
> /dev/wd0b       none            swap    sw,dp           0 0
> kernfs          /kern           kernfs  rw              0 0
> ptyfs           /dev/pts        ptyfs   rw              0 0
> procfs          /proc           procfs  rw              0 0
> tmpfs           /tmp            tmpfs   rw              0 0
>
> The host has 4 GB RAM and swap is large enough (32 GB).
>
> Martti

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