I noticed a couple problems with the lease patches.  Also:

On Wed, Oct 27, 2010 at 10:59:29AM -0400, Christoph Hellwig wrote:
quoted text
> On Wed, Oct 27, 2010 at 10:55:39AM -0400, J. Bruce Fields wrote:
> > Hm, two problems:
> > 	- We introduce the possibility of fcntl(fd, F_SETLEASE, F_UNLCK)
> > 	  failing with ENOMEM.
> 
> splitt ->setlease into ->add_least and ->delete_lease.  No need to pass
> in a structure for the later.  No need to return one either.

We still need to do this part.  I just did the minimum required to fix
the problem--I figure splitting out a separate ->delete_lease method
(which I agree would be cleaner) could wait till the next merge window.

Patches follow, tested on top of the merge of Arnd's patches; if they
look OK they can go in, or I can commit them on top of a few pending
nfsd fixes and send another pull request.

It'd be nice if we get this fixed by -rc1, but not the end of the world
if we don't.

--b.
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