From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0367344CF52; Mon, 5 Oct 2026 23:30:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791243015; cv=none; b=FhOQbiBg3sNFGlfF3pTpGhY2ZsUuorQtNprXWwoXJkVk44JitsGn5RJMY2xouYCTtkxNymtVXguLCw24a+vQMnls0vBtsiDNAPhqNLz68DHyBYAqW1tnLayyHJme2liR8G1f0boaY1mnXMA2gKKJR31T0ZZeC63CKS9emkE8OJY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791243015; c=relaxed/simple; bh=6XLeBHow2Pcci0n51TIHatXIIa0VAS2+TXe5xcWQ4kA=; h=Content-Type:MIME-Version:Subject:From:Message-Id:Date:References: In-Reply-To:To:Cc; b=IQPTWsg53UeZDswppiOaXQtBBJZWVPPzDQcLFhumJQn0DJzaRcIGoKCgqsvtBBrnQD0By1DOcVkyOsR3aTMhM1Tj1kx/rZEkjJ/Jm7u0w/KgsOb9HP28lMx0uFfyWcKj/7hNcBUH5eCgmQ+FfGTPAAQerW9pYKyz9FTbhGhds/g= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=QowSKdTg; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="QowSKdTg" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 452681F000FF; Mon, 5 Oct 2026 23:30:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1791243013; bh=SmEheTWh0J3/BQpX78BoIhroKKmwa4bnJ1PAI32f3F8=; h=Subject:From:Date:References:In-Reply-To:To:Cc; b=QowSKdTglffOCMECbjuqpAMyBjSXe0IwVe2eeCPRlbiPFr8CUDY2rnL5/c0wwX+u2 FK6woTdZrstoZC0cokzBWn1TFSI1m8PNX3EaxwdhSw7YKX6W/HJdK16A0vEFMupZF5 xygIzUXPVlc8yi1qcvJt/uri3Uzz3xNJolOxe+4VqU7nhzJbS0kPUjJaEsKvIR5EPP pn3qbFkaAQI68vdXFigt/222laEsF0AJ8H0H2YMIoyMLv8jJLRzvhhbQBUnawfKlEW gC0f8trnGlCXpLbQVNG8/W35ZRw1rCfB6IdkoZ9YFj5CMcD8u6ghZAZBCG/wIzu+IG +KZdLHtzzZZow== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id 3A23A392667F; Mon, 5 Oct 2026 23:30:13 +0000 (UTC) Content-Type: text/plain; charset="utf-8" Precedence: bulk X-Mailing-List: gfs2@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH v3 net-next 0/9] tcp: avoid struct socket cache line miss in tcp_check_space() From: patchwork-bot+netdevbpf@kernel.org Message-Id: <179124301177.1937173.6611394010312791388.git-patchwork-notify@kernel.org> Date: Mon, 05 Oct 2026 23:30:11 +0000 References: <20260929071743.23624-1-edumazet@kernel.org> In-Reply-To: <20260929071743.23624-1-edumazet@kernel.org> To: Eric Dumazet Cc: davem@davemloft.net, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, ncardwell@google.com, kuniyu@google.com, edumazet@google.com, netdev@vger.kernel.org, aahringo@redhat.com, teigland@redhat.com, gfs2@lists.linux.dev, john.fastabend@gmail.com, jakub@cloudflare.com, sd@queasysnail.net, jiayuan.chen@linux.dev, matttbe@kernel.org, martineau@kernel.org, geliang@kernel.org, mptcp@lists.linux.dev, guwen@linux.alibaba.com, dust.li@linux.alibaba.com, alibuda@linux.alibaba.com, cel@kernel.org, jlayton@kernel.org, neil@brown.name, okorniev@redhat.com, Dai.Ngo@oracle.com, tom@talpey.com, trondmy@kernel.org, anna@kernel.org, linux-nfs@vger.kernel.org, achender@kernel.org, rds-devel@oss.oracle.com, philipp.reisner@linbit.com, lars.ellenberg@linbit.com, christoph.boehmwalder@linbit.com, axboe@kernel.dk, drbd-dev@lists.linux.dev, kbusch@kernel.org, hch@lst.de, sagi@grimberg.me, kch@nvidia.com, linux-nvme@lists.infradead.org, idryomov@gmail.com, amarkuze@redhat.com, slava@dubeyko.com, ceph-devel@vger.kernel.org Hello: This series was applied to netdev/net-next.git (main) by Jakub Kicinski : On Tue, 29 Sep 2026 07:17:34 +0000 you wrote: > tcp_check_space() is called on every incoming ACK and every transmitted > packet, and tests SOCK_NOSPACE in sk->sk_socket->flags. Because struct > socket lives in its own cache line and the TCP fast paths do not touch > it for anything else, that test pulls in an extra cache line that is > cold when the working set of active sockets is large. > > This series mirrors SOCK_NOSPACE into a new u8 field, tp->tcp_nospace, > placed right after tp->chrono_type in the tcp_sock_write_tx cache line > group (fitting in an existing 3-byte hole before chrono_start, so no > other field moves and sizeof(struct tcp_sock) is unchanged). Both the > transmit and ACK fast paths already touch that cache line, making the > fast-path test in tcp_check_space() free of extra cache misses while > keeping __tcp_check_space() authoritative on SOCK_NOSPACE. > > [...] Here is the summary with links: - [v3,net-next,1/9] dlm: fix send buffer backpressure handling https://git.kernel.org/netdev/net-next/c/e234d7625598 - [v3,net-next,2/9] net: add sk_set_nospace() and sk_clear_nospace() https://git.kernel.org/netdev/net-next/c/6ba48a271bdb - [v3,net-next,3/9] sunrpc: use sk_set_nospace() and sk_clear_nospace() https://git.kernel.org/netdev/net-next/c/28613c4d4757 - [v3,net-next,4/9] rds: use sk_set_nospace() https://git.kernel.org/netdev/net-next/c/b747807ccaf9 - [v3,net-next,5/9] dlm: use sk_set_nospace() and sk_clear_nospace() https://git.kernel.org/netdev/net-next/c/0e0be63cb35d - [v3,net-next,6/9] drbd: use sk_set_nospace() https://git.kernel.org/netdev/net-next/c/24280d1d2832 - [v3,net-next,7/9] nvme-tcp: use sk_clear_nospace() https://git.kernel.org/netdev/net-next/c/f80fa2ddfe95 - [v3,net-next,8/9] libceph: use sk_clear_nospace() https://git.kernel.org/netdev/net-next/c/5181ac617537 - [v3,net-next,9/9] tcp: add tp->tcp_nospace https://git.kernel.org/netdev/net-next/c/4eee6d58ad14 You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html