geom using 100% cpu with failed da5. How to calm it down without cam passdev?

[Harald Schmalzbauer]

 Hello,

I've a failed disk at a remote server, which shouldn't be a problem
actually.
Just for info, here's the last shout:
    kernel: (da5:mps0:0:5:0): SYNCHRONIZE CACHE(10). CDB: 35 0 0 0 0 0 0
0 0 0 length 0 SMID 256 command timeout cm 0xffffff8001c64800 ccb
0xfffffe0007329000
    kernel: mps0: mpssas_alloc_tm freezing simq
    kernel: mps0: timedout cm 0xffffff8001c64800 allocated tm
0xffffff8001c50148
    kernel: (da5:mps0:0:5:0): SYNCHRONIZE CACHE(10). CDB: 35 0 0 0 0 0 0
0 0 0 length 0 SMID 256 completed timedout cm 0xffffff8001c64800 ccb
0xfffffe0007329000 during recovery ioc 8048 scsi 0 state c
xf(noperiph:mps0:0:5:0): SMID 1 abort TaskMID 256 status 0x4a code 0x0
count 1
    kernel: (noperiph:mps0:0:5:0): SMID 1 finished recovery after
aborting TaskMID 256
    kernel: mps0: mpssas_free_tm releasing simq
    kernel: (da5:mps0:0:5:0): SYNCHRONIZE CACHE(10). CDB: 35 0 0 0 0 0 0
0 0 0
    kernel: (da5:mps0:0:5:0): CAM status: Command timeout
    kernel: (da5:mps0:0:5:0): Retrying command
    kernel: (da5:mps0:0:5:0): TEST UNIT READY. CDB: 0 0 0 0 0 0 length 0
SMID 981 terminated ioc 804b scsi 0 state 0 xfer 0
    kernel: mps0: mpssas_alloc_tm freezing simq
    kernel: mps0: mpssas_remove_complete on handle 0x000e, IOCStatus= 0x0
    kernel: mps0: mpssas_free_tm releasing simq
    kernel: (da5:mps0:0:(pass7:5:mps0:0:0): lost device - 4 outstanding,
2 refs
    kernel: 5:0): passdevgonecb: devfs entry is gone
    kernel: (da5:mps0:0:5:0): oustanding 3
    kernel: (da5:mps0:0:5:0): oustanding 2
    kernel: (da5:mps0:0:5:0): oustanding 1
    kernel: (da5:mps0:0:5:0): oustanding 0

After reboot, 'camcontrol devlist' doesn't show any da5,
but 'geom disk list' _does_ show da5!!!

My problem is that geom is now consuming 100% of one core!
top -S:
13 root        3  -8    -     0K    48K -       1 480:19 100.00% geom

Since there's no /dev/da5 I can't use camcontrol to stop anything, and
at the moment nobody can physically remove the failed drive.
How can I calm geom down?
How can I find out what "geom" is doing/trying to do?
I guess it's related to the failed da5, but how can I know?

Thanks,

-Harry

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