On 07/23/2018 01:19 PM, Jarkko Sakkinen wrote: > In this case I do not have any major evidence of any major benefit *and* > the change breaks the ABI. As I said before - this does not break the ABI. As for the benefits - it help user space in how they implement the receive path. Application does not need to provide a 4K buffer for every read even if the response is, for instance 8 bytes long. Thanks, -- Tadeusz