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

[Shawn Webb]

On Tue, Jan 19, 2016 at 10:20:38AM -0700, Alan Somers wrote:
> On Tue, Jan 19, 2016 at 10:08 AM, Kurt Lidl <lidl at pix.net> wrote:
> > Removing the ability to run different zpools on top of a zvol is
> > a significant reduction in functionality of the entire system, and a huge
> > violation of the POLA.
> 
> 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.

I actively use this every day and will be making even more use of it in
the very near future. I haven't had a single kernel panic. I have had
deadlocks at shutdown, but since it's a laptop and I'm sitting right in
front of it, it's not a big deal.

I'd say fix the underlying problem, don't prevent people from getting
work done.

> 
> >
> > At the very least, can you not add a sysctl that allows the
> > dangerous behavior (even if it defaults to off)?  Myself
> > and certainly others rely on having being able to use a zpool
> > installed into a zvol for hosting bhyve virtual machines.
> 
> Your use case should be unaffected.  The guest has a different ZFS
> instance than the host, so it should work just fine.  Please let me
> know if you have problems.

-- 
Shawn Webb
HardenedBSD

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