The following happened with an illumos VM in bhyve.
Usually I reboot that VM by first powering it off using illumos 'poweroff'
command. But yesterday I tried to do that using 'reboot' command. Apparently
in that case illumos performs a warm reboot where a new kernel instance is
executed without the full hardware reset and firmware boot.
So, I got the following error in the guest during the reboot:
Block device: blkdev@0,0, blkdev0
blkdev0 is /pci@0,0/pci1af4,2@4/blkdev@0,0
/pci@0,0/pci1af4,2@4/blkdev@0,0 (blkdev0) online
WARNING: blkdev0: Invalid media block size (0)
WARNING: blkdev0: Invalid media block size (0)
NOTICE: Cannot read the pool label from '/pci@0,0/pci1af4,2@4/blkdev@0,0:a'
NOTICE: spa_import_rootpool: error 5
Cannot mount root on /pci@0,0/pci1af4,2@4/blkdev@0,0:a fstype zfs
At the same time bhyve printed the following message:
vtblk: read from CFGVEC: bad size 4
P.S.
There is another problem that perhaps is worth some attention as well.
The guest paniced after it failed to import the root pool. bhyve got stuck in a
weird way after that:
vm exit[2]
vm exit[1]
vm exit[3]
reason SVM
rip 0xfffffffffb8440aa
inst_length 0
exitcode 0x7f
exitinfo1 0
exitinfo2 0
reason SVM
rip 0xfffffffffb8440aa
inst_length 0
exitcode 0x7f
exitinfo1 0
exitinfo2 0
reason SVM
rip 0xfffffffffb8440aa
inst_length 0
exitcode 0x7f
exitinfo1 0
exitinfo2 0
^T
load: 0.98 cmd: bhyve 87140 [suspended] 20861.13r 643.47u 41127.33s 0% 3727592k
As you can see the process somehow became suspended and I was not able to
recover it (SIGKILL didn't help) and had to reboot the host.
--
Andriy Gapon
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