8.0-RC2: ZFS deadlock with zfs receive

[Stef Walter]

Borja Marcos wrote:
> I've been sending some alltraces to pjd about this easy to reproduce
> problem. I am using zfs send/zfs receive to replicate a dataset from one
> server to another. At 1 minute intervals, an incremental snapshot is
> sent to update the dataset copy. If there is reading activity on the
> dataset copy, a deadlock can happen rendering ZFS and all the FS
> subsystem unusable. I've tried with 8.0RC2 and it still happens.

FWIW, another (or the same) zfs recv deadlock I've been trying to get to
the bottom of:

http://lists.freebsd.org/pipermail/freebsd-fs/2009-October/006999.html

Cheers,

Stef