8.0-RC2: ZFS deadlock with zfs receive
Pawel Jakub Dawidek
pjd at FreeBSD.org
Fri Oct 30 23:28:14 UTC 2009
On Thu, Oct 29, 2009 at 03:52:45PM -0600, Stef Walter wrote:
> 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.
I was able to reproduce it, but I don't have fix yet.
> FWIW, another (or the same) zfs recv deadlock I've been trying to get to
> the bottom of:
Could you guys recompile your kernel after uncommenting line:
You should see panic on assertion instead of deadlock, I believe.
Pawel Jakub Dawidek http://www.wheel.pl
pjd at FreeBSD.org http://www.FreeBSD.org
FreeBSD committer Am I Evil? Yes, I Am!
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