On 8/31/2018 1:09 PM, Eugene Grosbein wrote:
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".
I do have "freebsd" (0xa5) type configured on the MBR partition.
# gpart show ada4
=> 63 937703025 ada4 MBR (447G)
63 937703025 1 freebsd [active] (447G)
# gpart show -r ada4
=> 63 937703025 ada4 MBR (447G)
63 937703025 1 165 [active] (447G)
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