is read-write nullfs safe?

Peter Jeremy peterjeremy at
Thu Jun 21 10:23:47 UTC 2007

On 2007-Jun-19 02:58:20 -0400, Kris Kennaway <kris at> 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?

Peter Jeremy
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