In the docs, there's two diff. ways they give you to adjust the oplock settings on OES2 SP1 Linux.

The first method is via NRM (which I used). Steps 1-5, no mention of restarting/rebooting anything.

The second method is via the nssstart.cfg, and that section has steps for restarting things (step 4)

So if you change it via NRM, do you need to also restart ndsd?