> 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
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