Roger,

I took your suggestion to check to see if my problem could have been fix in the base. I did some more research on this problem over the weekend. It looks like between 2.6.12.2 and 2.6.17.9 there were some interesting changes made to fs/locks.c to correct some file locking problems. I not sure that they correct the problem I am seeing but I am in the process of trying to port these changes back to my 2.6.12.2 OpenSSI kernel to run my test against them.

One fix I think needs to be done is in locks_remove_posix would be to use F_SETLKW. Currently we use F_SETLK and we don't check the return status.

More to follow,

John Steinman