On Tue, Jun 13, 2000 at 01:02:25PM -0400, Todd Vierling wrote:
> 
> ...is UNION stable enough to use so long as the independent layers are never
> accessed while the union filesystem is mounted?

  I've been using it for years for kernel and userland builds, and have never
had a problem (but I don't modify the lower layer during the builds; reading
the lower layer appears not to be a problem--I do that routinely).