From: patchwork-bot+netdevbpf@kernel.org
To: Kuniyuki Iwashima <kuniyu@google.com>
Cc: edumazet@kernel.org, ncardwell@google.com,
daniel.zahka@gmail.com, willemdebruijn.kernel@gmail.com,
davem@davemloft.net, kuba@kernel.org, pabeni@redhat.com,
dsahern@kernel.org, idosch@nvidia.com, horms@kernel.org,
thaisonphan@google.com, kuni1840@gmail.com,
netdev@vger.kernel.org
Subject: Re: [PATCH v1 net-next 0/2] tcp: Let non-PSP and PSP share mtu and advmss.
Date: Fri, 06 Nov 2026 12:00:19 +0000 [thread overview]
Message-ID: <179396641976.575356.9858593759192464397.git-patchwork-notify@kernel.org> (raw)
In-Reply-To: <20261103000712.658501-1-kuniyu@google.com>
Hello:
This series was applied to netdev/net-next.git (main)
by Paolo Abeni <pabeni@redhat.com>:
On Tue, 3 Nov 2026 00:06:01 +0000 you wrote:
> Since psp_sk_overhead() is added to icsk->icsk_ext_hdr_len,
> which is subtracted after clamping in __tcp_mtu_to_mss(),
> it is impossible to configure a route that both PSP and
> non-PSP achieve 4K MSS for TCP_ZEROCOPY_RECEIVE.
>
> mtu 4220 advmss 4108
> -> non-PSP gets 4K MSS, but PSP gets 4056, breaking
> TCP_ZEROCOPY_RECEIVE
>
> [...]
Here is the summary with links:
- [v1,net-next,1/2] psp: Check pas->tx.spi in psp_sk_overhead().
https://git.kernel.org/netdev/net-next/c/7020a2766440
- [v1,net-next,2/2] tcp: Subtract psp_sk_overhead() in __tcp_mtu_to_mss() and tcp_mss_to_mtu().
https://git.kernel.org/netdev/net-next/c/3c6e29760c13
You are awesome, thank you!
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prev parent reply other threads:[~2026-11-06 13:15 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-03 0:06 [PATCH v1 net-next 0/2] tcp: Let non-PSP and PSP share mtu and advmss Kuniyuki Iwashima
2026-11-03 0:06 ` [PATCH v1 net-next 1/2] psp: Check pas->tx.spi in psp_sk_overhead() Kuniyuki Iwashima
2026-11-04 15:17 ` Daniel Zahka
2026-11-05 3:57 ` Willem de Bruijn
2026-11-03 0:06 ` [PATCH v1 net-next 2/2] tcp: Subtract psp_sk_overhead() in __tcp_mtu_to_mss() and tcp_mss_to_mtu() Kuniyuki Iwashima
2026-11-04 16:42 ` Daniel Zahka
2026-11-05 3:52 ` Willem de Bruijn
2026-11-06 12:00 ` patchwork-bot+netdevbpf [this message]
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