Subject: Re: vnode locking procedure change to suport stacked fs's.
To: Bill Studenmund <wrstuden@nas.nasa.gov>
From: Bill Sommerfeld <sommerfeld@orchard.arlington.ma.us>
List: tech-kern
Date: 05/24/1999 20:35:05 
This is a good change.  

However, I don't think it will be sufficient to cure many of the
unionfs locking problems.  Fixing unionfs likely requires use of
reader-writer locks, at least on directories.  (reader-writer locks
will also improve MP scalability..).

I also think that doing it right will require changing the lockmgr to
support true read-intend-write locks...).

(I'm interested in working on this for 1.5...)

					- Bill