svn commit: r294329 - in head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs: . sys

[Alan Somers]

On Wed, Jan 20, 2016 at 2:20 AM, Andriy Gapon <avg at freebsd.org> wrote:
> On 19/01/2016 19:20, Alan Somers wrote:
>> The thing is, it never really worked in the first place.  Panics and
>> deadlocks are so frequent that I don't think the feature was usable
>> for anybody.
>
> The feature is perfectly usable for me.  I have never run into the problems that
> you describe.  Why not fix the real bugs that you've run into?
>
> --
> Andriy Gapon

Spectra Logic and iXSystems both experienced many problems with this.
The worst is a deadlock that can be triggered simply by pulling a
drive from a redundant pool when there exists a zvol anywhere in the
system (see https://reviews.freebsd.org/D4998 for a quick way to
reproduce).  Fixing it correctly would likely require far more time
than I have available.  I just want the bugs to go away.  See that
same code review for a change to make the feature optional.

-Alan