From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from korolev.univ-paris7.fr (korolev.univ-paris7.fr [IPv6:2001:660:3301:8000::1:2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id F13CF3B2A4 for ; Tue, 2 Apr 2024 09:47:20 -0400 (EDT) Received: from potemkin.univ-paris7.fr (potemkin.univ-paris7.fr [IPv6:2001:660:3301:8000::1:1]) by korolev.univ-paris7.fr (8.14.4/8.14.4/relay1/82085) with ESMTP id 432DlJwl028150 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Tue, 2 Apr 2024 15:47:19 +0200 Received: from mailhub.math.univ-paris-diderot.fr (mailhub.math.univ-paris-diderot.fr [81.194.30.253]) by potemkin.univ-paris7.fr (8.14.4/8.14.4/relay2/82085) with ESMTP id 432DlITB011458; Tue, 2 Apr 2024 15:47:18 +0200 Received: from mailhub.math.univ-paris-diderot.fr (localhost [127.0.0.1]) by mailhub.math.univ-paris-diderot.fr (Postfix) with ESMTP id 7D01062C71; Tue, 2 Apr 2024 15:47:18 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=irif.fr; h= content-type:content-type:mime-version:user-agent:references :in-reply-to:subject:subject:from:from:message-id:date:date :received:received; s=dkim-irif; t=1712065636; x=1712929637; bh= nUuSbt/dJIZ7ocbCjjvver9YJfR5Jt6aIQP70AY4QPA=; b=FIDE7dKxB77XjNa1 y0O5Fc8VLEDgJV5Zn7Ng63k/SYmSYkl8GDg+mqOFssTLL7aXiISSZydS3/xCdeTH 0xRGqlHYhcx+YSAEHR4COhaUTLHqHWAA8o7LGOp8HUdeI9cyITSA48vlJZjsowhq R7h1tKKacQbA2//RQwR/+sNyPkZP28Dz/e/KSk+V2i1IeAhnhLAWQWOYazlpLMCk LWQje7ji9jahK4NqJ9osMm+BFinbWxZC5+RJ2s1PF7JtdE60x+smh58UEUCbak6D +6dsJm1F/rKIYcOAO09xqYgOEDe+I0pa7fF+RmrskoIt3S2tvV3ZlUaoyGY0iL0W Ij45/g== X-Virus-Scanned: amavisd-new at math.univ-paris-diderot.fr Received: from mailhub.math.univ-paris-diderot.fr ([127.0.0.1]) by mailhub.math.univ-paris-diderot.fr (mailhub.math.univ-paris-diderot.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id iGV-HNPx8B_U; Tue, 2 Apr 2024 15:47:16 +0200 (CEST) Received: from pirx.irif.fr (unknown [78.194.40.74]) (Authenticated sender: jch) by mailhub.math.univ-paris-diderot.fr (Postfix) with ESMTPSA id 7BFC062C6E; Tue, 2 Apr 2024 15:47:16 +0200 (CEST) Date: Tue, 02 Apr 2024 15:47:15 +0200 Message-ID: <87frw35124.wl-jch@irif.fr> From: Juliusz Chroboczek To: Toke =?ISO-8859-1?Q?H=F8iland-J=F8rgensen?= Cc: bloat In-Reply-To: <87v850n7qu.fsf@toke.dk> References: <87frw5nrsv.wl-jch@irif.fr> <87v850n7qu.fsf@toke.dk> User-Agent: Wanderlust/2.15.9 (Almost Unreal) Emacs/29.2 Mule/6.0 MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.7 (korolev.univ-paris7.fr [IPv6:2001:660:3301:8000::1:2]); Tue, 02 Apr 2024 15:47:19 +0200 (CEST) X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.7 (potemkin.univ-paris7.fr [194.254.61.141]); Tue, 02 Apr 2024 15:47:19 +0200 (CEST) X-Miltered: at korolev with ID 660C0C67.000 by Joe's j-chkmail (http : // j-chkmail dot ensmp dot fr)! X-Miltered: at potemkin with ID 660C0C66.003 by Joe's j-chkmail (http : // j-chkmail dot ensmp dot fr)! X-j-chkmail-Enveloppe: 660C0C67.000 from potemkin.univ-paris7.fr/potemkin.univ-paris7.fr/null/potemkin.univ-paris7.fr/ X-j-chkmail-Enveloppe: 660C0C66.003 from mailhub.math.univ-paris-diderot.fr/mailhub.math.univ-paris-diderot.fr/null/mailhub.math.univ-paris-diderot.fr/ X-j-chkmail-Score: MSGID : 660C0C67.000 on korolev.univ-paris7.fr : j-chkmail score : . : R=. U=. O=. B=0.000 -> S=0.000 X-j-chkmail-Score: MSGID : 660C0C66.003 on potemkin.univ-paris7.fr : j-chkmail score : . : R=. U=. O=. B=0.000 -> S=0.000 X-j-chkmail-Status: Ham X-j-chkmail-Status: Ham Subject: Re: [Bloat] The sad state of MP-TCP X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 02 Apr 2024 13:47:21 -0000 >> There should be a knob in the kernel to transparently replace TCP with >> MP-TCP, but I couldn't find one. > There is, sorta. Specifically, a BPF hook that can override the protocol > (added in kernel 6.6): > > https://lore.kernel.org/all/cover.1692147782.git.geliang.tang@suse.com/ So we're no longer doing sysctls, we're now monkey patching system calls? I guess if it works for JavaScript, why shouldn't it work for the kernel. -- Juliusz