netdev - Re: [PATCH net-next v5] udp:allow UDP cmsghdrs through io

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Date:   Thu, 17 Dec 2020 18:30:30 +0000
From:   Victor Stewart <v@...etag.social>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     io-uring <io-uring@...r.kernel.org>,
        Soheil Hassas Yeganeh <soheil@...gle.com>,
        netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next v5] udp:allow UDP cmsghdrs through io_uring

might this still make it into 5.11?

On Thu, Dec 17, 2020 at 3:49 PM Jens Axboe <axboe@...nel.dk> wrote:
>
> On 12/16/20 3:56 PM, Victor Stewart wrote:
> > This patch adds PROTO_CMSG_DATA_ONLY to inet_dgram_ops and inet6_dgram_ops so that UDP_SEGMENT (GSO) and UDP_GRO can be used through io_uring.
> >
> > GSO and GRO are vital to bring QUIC servers on par with TCP throughputs, and together offer a higher
> > throughput gain than io_uring alone (rate of data transit
> > considering), thus io_uring is presently the lesser performance choice.
> >
> > RE http://vger.kernel.org/lpc_net2018_talks/willemdebruijn-lpc2018-udpgso-paper-DRAFT-1.pdf,
> > GSO is about +~63% and GRO +~82%.
> >
> > this patch closes that loophole.
>
> LGTM
>
> Acked-by: Jens Axboe <axboe@...nel.dk>
>
> --
> Jens Axboe
>