From: Jakub Kicinski <kuba@kernel.org>
To: Alice Mikityanska <alice.kernel@fastmail.im>
Cc: Daniel Borkmann <daniel@iogearbox.net>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Paolo Abeni <pabeni@redhat.com>, Xin Long <lucien.xin@gmail.com>,
Willem de Bruijn <willemdebruijn.kernel@gmail.com>,
Willem de Bruijn <willemb@google.com>,
David Ahern <dsahern@kernel.org>,
Nikolay Aleksandrov <razor@blackwall.org>,
Shuah Khan <shuah@kernel.org>,
Stanislav Fomichev <stfomichev@gmail.com>,
Andrew Lunn <andrew+netdev@lunn.ch>,
Simon Horman <horms@kernel.org>, Florian Westphal <fw@strlen.de>,
netdev@vger.kernel.org, Alice Mikityanska <alice@isovalent.com>
Subject: Re: [PATCH net-next v5 00/11] BIG TCP for UDP tunnels
Date: Wed, 27 May 2026 19:13:03 -0700 [thread overview]
Message-ID: <20260527191303.78dfffde@kernel.org> (raw)
In-Reply-To: <20260526161200.1135899-1-alice.kernel@fastmail.im>
On Tue, 26 May 2026 18:11:49 +0200 Alice Mikityanska wrote:
> This series is a follow-up to "BIG TCP without HBH in IPv6", and it adds
> support for BIG TCP IPv4/IPv6 workloads in vxlan and geneve. Now that
> IPv6 BIG TCP doesn't require stripping the HBH in all various
> combinations in tunneled traffic, adding BIG TCP becomes feasible.
>
> Patches 01-02 are small fixups to some related code that I'm changing in
> the series.
>
> Patch 03 adds accessors for the length field in the UDP header, as
> suggested by Paolo in review. The usage of udp_set_len is then added in
> the following patches that start using length=0 in BIG TCP UDP packets.
>
> Patches 04-06 close the gaps that prevent BIG TCP packets from going
> through UDP tunnel code.
>
> Patch 07 re-adds proper validation of malformed packets that arrive with
> length=0 from the wire.
>
> Patch 08 is for proper formatting in tcpdump (set UDP len to 0 rather
> than a trimmed value on overflow).
>
> Patches 09-10 bump up tso_max_size for VXLAN and GENEVE.
>
> Patch 11 adds selftests.
Looks like the selftest fails on debug kernel builds:
# overriding timeout to 7200
# selftests: net: big_tcp_tunnels.sh
# 0.50 [+0.50] Setting up VXLAN over IPv4
# 0.78 [+0.28] Running IPv4 traffic in the tunnel
# 5.93 [+5.14] Captured BIG TCP GRO packets: 18138
# 5.93 [+0.00] Captured BIG TCP GSO packets: 17445
# 6.01 [+0.08] Setting up VXLAN over IPv4
# 6.29 [+0.29] Running IPv6 traffic in the tunnel
# 11.40 [+5.11] Captured BIG TCP GRO packets: 17827
# 11.40 [+0.00] Captured BIG TCP GSO packets: 16964
# 11.49 [+0.08] Setting up VXLAN over IPv6
# 11.78 [+0.29] Running IPv4 traffic in the tunnel
# 16.89 [+5.11] Captured BIG TCP GRO packets: 8951
# 16.89 [+0.00] Captured BIG TCP GSO packets: 9063
not ok 1 selftests: net: big_tcp_tunnels.sh # exit=1
https://netdev-ctrl.bots.linux.dev/logs/vmksft/net-dbg/results/665442/153-big-tcp-tunnels-sh/stdout
https://netdev-ctrl.bots.linux.dev/logs/vmksft/net-dbg/results/665442/153-big-tcp-tunnels-sh-retry/stdout
prev parent reply other threads:[~2026-05-28 2:13 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-26 16:11 [PATCH net-next v5 00/11] BIG TCP for UDP tunnels Alice Mikityanska
2026-05-26 16:11 ` [PATCH net-next v5 01/11] net/sched: act_csum: don't mangle UDP tunnel GSO packets Alice Mikityanska
2026-05-26 16:11 ` [PATCH net-next v5 02/11] geneve: Fix off-by-one comparing with GRO_LEGACY_MAX_SIZE Alice Mikityanska
2026-05-26 16:11 ` [PATCH net-next v5 03/11] net: Use helpers to get/set UDP len tree-wide Alice Mikityanska
2026-05-26 16:11 ` [PATCH net-next v5 04/11] net: Enable BIG TCP with partial GSO Alice Mikityanska
2026-05-26 16:11 ` [PATCH net-next v5 05/11] udp: Support gro_ipv4_max_size > 65536 Alice Mikityanska
2026-05-26 16:11 ` [PATCH net-next v5 06/11] udp: Support BIG TCP GSO packets where they can occur Alice Mikityanska
2026-05-26 16:11 ` [PATCH net-next v5 07/11] udp: Validate UDP length in udp_gro_receive Alice Mikityanska
2026-05-26 16:11 ` [PATCH net-next v5 08/11] udp: Set length in UDP header to 0 for big GSO packets Alice Mikityanska
2026-05-26 16:11 ` [PATCH net-next v5 09/11] vxlan: Enable BIG TCP packets Alice Mikityanska
2026-05-26 16:11 ` [PATCH net-next v5 10/11] geneve: " Alice Mikityanska
2026-05-26 16:12 ` [PATCH net-next v5 11/11] selftests: net: Add a test for BIG TCP in UDP tunnels Alice Mikityanska
2026-05-28 2:13 ` Jakub Kicinski [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20260527191303.78dfffde@kernel.org \
--to=kuba@kernel.org \
--cc=alice.kernel@fastmail.im \
--cc=alice@isovalent.com \
--cc=andrew+netdev@lunn.ch \
--cc=daniel@iogearbox.net \
--cc=davem@davemloft.net \
--cc=dsahern@kernel.org \
--cc=edumazet@google.com \
--cc=fw@strlen.de \
--cc=horms@kernel.org \
--cc=lucien.xin@gmail.com \
--cc=netdev@vger.kernel.org \
--cc=pabeni@redhat.com \
--cc=razor@blackwall.org \
--cc=shuah@kernel.org \
--cc=stfomichev@gmail.com \
--cc=willemb@google.com \
--cc=willemdebruijn.kernel@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox