tree 998b5e200cd6a519a39b80c43516895a2cc91519
parent 8897538e97ed80570f6e3befc41ca0288b776799
author Trond Myklebust <Trond.Myklebust@netapp.com> 1378410771 -0400
committer Trond Myklebust <Trond.Myklebust@netapp.com> 1378419102 -0400

NFS: Don't check lock owner compatibility in writes unless file is locked

If we're doing buffered writes, and there is no file locking involved,
then we don't have to worry about whether or not the lock owner information
is identical.
By relaxing this check, we ensure that fork()ed child processes can write
to a page without having to first sync dirty data that was written
by the parent to disk.

Reported-by: Quentin Barnes <qbarnes@gmail.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Tested-by: Quentin Barnes <qbarnes@gmail.com>