> On Apr 11, 2016, at 4:35 PM, Steve Wise <swise@xxxxxxxxxxxxxxxxxxxxx> wrote: > >> Avoid the latency and interrupt overhead of registering a Write >> chunk when handling NFS READ requests of a few hundred bytes or >> less. >> >> This change does not interoperate with Linux NFS/RDMA servers >> that do not have commit 9d11b51ce7c1 ('svcrdma: Fix send_reply() >> scatter/gather set-up'). >> >> $ git describe 9d11b51ce7c1 >> v4.2-rc3-10-g9d11b51 >> > > Hey Chuck, > > Is there any way to avoid breaking interoperability with older servers? No, pre-4.2 Linux servers have a bug that can be fixed by applying the above commit, which shouldn't be difficult to backport. Clients have always been allowed to send NFS READ this way. -- Chuck Lever -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html