zfs discuss - Jun 2010 - Kernel panic on zpool status -v (build 143)

Hello,

I got a zfs panic on build 143 (installed with onu) in the following unusual
situation:

	1) ''zpool scrub'' found a corrupted snapshot on which two BEs
were based.
	2) I removed the first dependency with ''zfs promote''.
	3) I removed the second dependency with ''zfs -pv send ... | zfs -v
receive ...''
	4) ''zfs destroy'' said "dataset busy" when called on
the old snapshot. So I rebooted.
	5) After the reboot, the corrupted snapshot could be successfully destroyed.
	6) One dataset and two other snapshots created on the way (in (3)) were
removed.
	7) Now ''zpool status -v'' *crashed* the kernel.
	8) After a reboot, ''zpool status -v'' caused a crash again.

I ran ''zpool scrub'' and will report what happens once
it''s finished. (It will take pretty long.)

An mdb session output is attached to this message. I can provide the full crash
dump if you wish. (As for the ::stack at the end, I''m not sure if
it''s meaningful. This is (unfortunately) not a debugging kernel, so the
first 6 arguments should not be stored on the stack.)

Andrej
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> I ran ''zpool scrub'' and will report what happens once
it''s finished. (It will take pretty long.)
The scrub finished successfully (with no errors) and ''zpool status
-v'' doesn''t crash the kernel any more.

Andrej

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