Re: [PATCH v2 net-next 4/4] udp: add batching to udp_rmem_release()

[Eric Dumazet]

On Thu, Dec 8, 2016 at 10:24 AM, Paolo Abeni <pab...@redhat.com> wrote:

> Nice one! This sounds like a relevant improvement!
>
> I'm wondering if it may cause regressions with small value of
> sk_rcvbuf ?!? e.g. with:
>
> netperf -t UDP_STREAM  -H 127.0.0.1 -- -s 1280 -S 1280 -m 1024 -M 1024
>

Possibly, then simply we can refine the test to :

size = up->forward_deficit;
if (size < (sk->sk_rcvbuf >> 2)  && !skb_queue_empty(sk->sk_receive_buf))
     return;