Re: [PATCH 00/11] SUNRPC server scalability improvements

[Bruce Fields <bfields@fieldses.org>]

On Mon, Aug 04, 2014 at 09:36:41AM -0400, Bruce Fields wrote:
> On Sun, Aug 03, 2014 at 01:03:02PM -0400, Trond Myklebust wrote:
> > When testing knfsd on 10GigE and 40GigE networks, we've been hitting a few
> > scalability issues that are seriously affecting performance. The main issue
> > was scalability of the pool->sp_lock, but we also hit a couple of things
> > like the use of ioctls in the receive fast path, as well as some issues
> > with heuristic tests being performed twice in the same path.
> > 
> > This is not urgent, and can definitely be delayed until the 3.18 merge
> > window, however since the performance gains were significant over NFSv3,
> > I thought I'd share now.
> 
> Thanks!  On a quick skim these and the DRC patches look good.
> 
> My first priority is to see if I can merge the last of the state locking
> patches which are already in nfsd-next, so yes I'll probably queue these
> up for 3.18 later.

Though note I already applied the first three--I'm assuming the versions
of those posted here are the same as the ones previously applied.  (See
git://linux-nfs.org/~bfields/linux.git for-3.17.)

--b.