tree 31dbb285639ea68db3abc0c4129988f02d50f11a
parent d9ef5a8c26aab09762afce43df64736720b4860e
author Chuck Lever <cel@netapp.com> 1142880254 -0500
committer Trond Myklebust <Trond.Myklebust@netapp.com> 1142880254 -0500

NFS: add I/O performance counters

Invoke the byte and event counter macros where we want to count bytes and
events.

Clean-up: fix a possible NULL dereference in nfs_lock, and simplify
nfs_file_open.

Test-plan:
fsx and iozone on UP and SMP systems, with and without pre-emption.  Watch
for memory overwrite bugs, and performance loss (significantly more CPU
required per op).

Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>