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 BE80A42980B; Mon, 15 Jun 2026 16:51:13 +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=1781542274; cv=none; b=hHqB/4HPHhYG8QntLdL6Ivy1Tp7B0Yob6fYlRmASRE8H7LLKofh2ojsH5vlSwb+bSFqzY5L2tnsFWIJDsW4buLFR/ycm5ownvGTNC4cyXfmrrmfy3IqazMOxED7ZvbQQrAyrXLm6SmIqrtv6lj+ifx74fMPKXQVQ6BFf+hhSob8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781542274; c=relaxed/simple; bh=4Hldff5Shw/RhPnWMRDH6F6iSV94zbTwaJQK5z7eUnQ=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=rQ4MmLCSi8UVwWQdjTscUn3TU0rZIA258owdh1khblZizfZAHF9AAGiwzcEdkM2zWIR/qUGbgNZA7Z1pyMfPHO+AXMfNonHdguSLgs8TvAuUftSUcPMBiJx20nBua9WV6c6LU6WruwuPY3vjZ2TE4MNocaSjYMN0uuQcTNTChbQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=jw4v1n3g; 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="jw4v1n3g" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BF2E91F00A3A; Mon, 15 Jun 2026 16:51:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1781542273; bh=4Hldff5Shw/RhPnWMRDH6F6iSV94zbTwaJQK5z7eUnQ=; h=Date:From:To:Cc:Subject:In-Reply-To:References; b=jw4v1n3gwACU3EF95g0jgItIYkmUY8lK7fJt0Gz7t4zJ8YrFsmrvtAsQLztFNfb6I F7IhAvsWICQocODvaV4RXXlj+/dFZswaLy52deambgQDYDdON5qK/mzSEaN+ew74O6 0YGvNDXlXhM1aCW9J3V8ZmtLBUXo5cZ0eQixSN9sa32iakwax2x+Aq+58O+Eo+ayq8 rANAN7WIOWIzIjnIiiEHwSWpx8870P5AeIY2rPFuDuZektekp5Ps6odKPc2kcOVvnQ L8WQwV+r5udLKa7E7e0kybJH2aFSS36NHeZ4RKcDztfXaQJyhzCtfmJxqLN8ZGQ2ys LPNhN7edIqmZQ== Date: Mon, 15 Jun 2026 09:51:12 -0700 From: Jakub Kicinski To: Luke Howard Cc: Cedric Jehasse via B4 Relay , cedric.jehasse@luminex.be, Andrew Lunn , Vladimir Oltean , "David S. Miller" , Eric Dumazet , Paolo Abeni , Simon Horman , Russell King , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Marek =?UTF-8?B?QmVow7pu?= , Cedric Jehasse Subject: Re: [PATCH net-next v7 2/2] net: dsa: mv88e6xxx: add support for credit based shaper Message-ID: <20260615095112.1dca0977@kernel.org> In-Reply-To: <9E7B1B5A-ACE1-4488-A600-96FAD88D070E@padl.com> References: <20260609-net-next-mv88e6xxx-cbs-v7-0-7d5d732df545@luminex.be> <20260609-net-next-mv88e6xxx-cbs-v7-2-7d5d732df545@luminex.be> <20260612153656.4c5b8c62@kernel.org> <9E7B1B5A-ACE1-4488-A600-96FAD88D070E@padl.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On Sat, 13 Jun 2026 13:37:08 +1000 Luke Howard wrote: > On egress, one can use the switch chips=E2=80=99 AVB support, but this li= mits > the number of TCs to three (corresponding to SR class A, B, and > =E2=80=98legacy=E2=80=99 traffic). I have a submitted MQPRIO offload patc= h that does > this. This matches how MQPRIO and CBS are used on end station NICs, > but is not flexible enough to support an arbitrary number of TCs. > Because of this, offloading PRIO may be cleaner. Yes, it's been a while since I worked on qdisc offload, but the NIC / host-centric offloads operate quite differently than the switch-centric ones. Offloading MQPRIO to a switch is likely to lead to technical debt.