Description of problem:
When cthon lock test run on pnfs mount it fails at the TEST no7

Test #7 - Test parent/child mutual exclusion.
	Parent: 7.0  - F_TLOCK [             ffc,               9] PASSED.
	Parent: Wrote 'aaaa eh' to testfile [ 4092, 7 ].
	Parent: Now free child to run, should block on lock.
	Parent: Check data in file to insure child blocked.
tlock: short read (got 0, expected 7)
	Child:  7.3  - F_LOCK  [             ffc,               9] PASSED.
	Child:  Write child's version of the data and release lock.

** PARENT pass 1 results: 22/22 pass, 0/0 warn, 0/0 fail (pass/total).

**  CHILD pass 1 results: 45/45 pass, 0/0 warn, 0/0 fail (pass/total).
lock tests failed


Version-Release number of selected component (if applicable):
mailine

How reproducible:
always

Steps to Reproduce:
1. create a volume
2. export the volume using nfs-ganesha
3. mount the volume using pnfs
4. Run cthon lock test on the mount


Actual results:
It is failing at testno7

Expected results:
It should pass successfully

Additional info:
It is not tested in normal nfs4.1 mount(may be issue exists in that too)