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Date: Sun, 13 Dec 2020 20:31:11 +0000 From: Victor Stewart <v@...etag.social> To: io-uring@...r.kernel.org, soheil@...gle.com, netdev@...r.kernel.org, jannh@...gle.com Subject: [PATCH v2] Allow UDP cmsghdrs through io_uring 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. net/ipv4/af_inet.c | 1 + net/ipv6/af_inet6.c | 1 + net/socket.c | 8 +++++--- 3 files changed, 7 insertions(+), 3 deletions(-)
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