31.08.2018 23:08, Samuel Chow wrote:
> I am running 11-STABLE, and I am experiencing kernel panics when I am
> destroying a VIMAGE-based jail. Naturally, I flipped to the chapter about
> 'Kernel Debugging' to learn about 'Obtaining a Kernel Crash Dump'.
>
> However, I am finding that my permanently glabel'ed disk partition cannot be
> used as dumpdev. Is that true, and why not? I mean, swap can use it just
> fine. I am unable to find this restriction in the documentation.
>
>
> # grep swap /etc/fstab
> /dev/label/boot01b none swap sw 0 0
> # swapinfo
> Device 1K-blocks Used Avail Capacity
> /dev/label/boot01b 41943040 0 41943040 0%
> # glabel status | grep boot
> label/boot01 N/A ada4s1
> label/boot02 N/A ada5s1
> # dumpon /dev/label/boot01b
> dumpon: ioctl(DIOCSKERNELDUMP): Operation not supported by device
That's not about label but underlying device that seems to be GEOM_PART_MBR
and it allows kernel dumps only if slice (MBR partition) type is 0xa5 for
"freebsd"
or 0x82 ("linux swap"). Please show output of the command "gpart show ada4".
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