NFS deadlock on 9.2-Beta1

[J David]

On Sat, Aug 24, 2013 at 3:38 PM, Konstantin Belousov
<kostikbel at gmail.com> wrote:
> No, at least not without reverting the r254754 first.  The IGN_SBUSY patch
> is not critical there.

There is lots of other stuff in r250907 / reverted by r254754.  Some
of it looks important for sendfile() performance.  If testing this
extensively in the next few days could help get that work back into
9.2 we are happy to do it, but if it's too late then we can leave it
for those on stable/9.

Thanks!