On Apr 28,  7:05pm, chap@netbsd.org (Chapman Flack) wrote:
-- Subject: Re: kern/33375

|  That means as far as I can tell there is no practical workaround
|  and this PR's priority should be increased, as it represents a
|  serious regression in COMPAT_30; on real 3.0 systems getdents/
|  readdir in union filesystems worked right, as it worked even in 2.0
|  and earlier, and it works in -current, but now 3.0 binaries on
|  a -current system /will malfunction/ if union filesystems are in
|  use. Given that the freshest binary packages available for use on
|  -current are those built for 3.0, this regression effectively makes
|  the unionfs unusable at all.

None of the emulated getdents support unionfs [and whiteouts]. This is
a more general problem. So far is has not been addressed because of the
complexity it would introduce to the code.

christos