[HEADSUP] New unionfs merged to RELENG_6 (stable)

[Craig Rodrigues]

Hi,

I have merged the new unionfs implementation from
CURRENT to RELENG_6 (stable branch).  This code
was submitted by Daichi GOTO and Masanori OZAWA.
Many, many thanks to GOTO-san and OZAWA-san for their work.

This code solves a lot of crashing problems that the old
unionfs implementation had.

Reports from people running SMP systems would be appreciated.
There probably is some room for performance optimization on SMP systems.

Also, thanks a lot to Kostik Belousov, who recently fixed some deadlock
problems in vfs_lookup.c, which helps a lot with unionfs.
-- 
Craig Rodrigues        
rodrigc at crodrigues.org