is read-write nullfs safe?

[Kris Kennaway]

On Thu, Jun 21, 2007 at 09:49:16PM +0800, Rong-en Fan wrote:
> On 6/21/07, Peter Jeremy <peterjeremy at optushome.com.au> wrote:
> >On 2007-Jun-19 02:58:20 -0400, Kris Kennaway <kris at obsecurity.org> wrote:
> >>On Tue, Jun 19, 2007 at 02:39:22PM +0800, Rong-en Fan wrote:
> >>> I was asking about nullfs because the following lines
> >>> in sys/conf/NOTES:
> >>>
> >>> # NB: The NULL, PORTAL, UMAP and UNION filesystems are known to be
> >>> # buggy, and WILL panic your system if you attempt to do anything with
> >>> # them.  They are included here as an incentive for some enterprising
> >>> # soul to sit down and fix them.
> >>
> >>Yeah, that's almost completely stale for both 6.x and 7.x.
> >
> >Since this issue pops up fairly regularly, would it be possible to
> >correct, tone down or remove this warning before 6.3/7.0?
> 
> Ya, how about this one:
> 
> http://people.freebsd.org/~rafan/remove-nullfs-warning.diff

Maybe note that UNIONFS is being maintained now and is in a much
better state, although there are still some issues being resolved.

> It just remove NULL from the warning list. If no one objects,
> I will ask re@ for approval tomorrow. BTW, since umapfs
> is disconnected from build, shall we axe it?

I would recommend it.

Kris