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
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