[Bug 193803] zvol promote failing

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=193803

--- Comment #1 from Gavin Atkinson <gavin at FreeBSD.org> ---
Hi,

When the system is in a hung state, can you please show the output of

ps -auxwww -O wchan |grep zfs

And for each process listed, run "procstat -kk [pid]"

It would also be interesting to know if there is any disk activity while in the
hung state.  "iostat -t da -c 5 5" should do it.

Thanks,

Gavin

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