From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=74.208.142.49 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794045748; b=P9S2q6LaGt+EJrNLY4LR7Fq4jgb8/9hwm5HXymPUFjOMv2l7TWO27dMATfpEB0Q0vAFf /exgCutrWtoRHBCkY5DOBrJaAC9ehIxXAU05EjANDF14NPZ7ROjzYBX1ctrkrZE6Vo7Jc qPB7t5suZyGp3e9qxQjuptZHigcHOiDyWKoKQ6bSuXNa4uytazvZbFe2x5HB/sXyrt9Ux nhhNntskRWz0eu7pg25NoEXIFV5PEcuRl6XLBkfpDH0oLExwFp1E+wgdS/oWfEB2rE/49 ZKfHe8/NwgIx8hSs4SR5K9jOG16Tyynh0i42VHn6F/ayuvyHBQvknuZZQTUc6CKg2OQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794045748; h=DMARC-Filter:DKIM-Signature:Received:From:To:Cc:Subject:Date: Message-ID:X-Mailer:In-Reply-To:References:MIME-Version: Content-Transfer-Encoding; bh=TjMdFk8RF2kaRdnGIftRqRXHaK9TIJqelTHCSWvnKbg=; b=D7yz3vl7pUwRg3vphWjNCEkgelCIvPfkfgzPmVVQCaBOmnQqFv5OzOrfm62BDMyMKOrj 2hY3Q3uzfrC7cft3ruaMIQ+XAavBjiqX8yCAvIbU9Gv9cWV2pWLlYNmDEyYLaiD2KdjgY 6Dk8dNcQNFcfg8lFmYL68UWOoKCiOaPZ+dyUFtekpNs2lvjOQjMWWNlWELSh/jSFjUmwO m+eTkVe/EE0qjoJRXTB8ELJbui2D5hTxP7mHUvzDkgYSzO52J5C+ImmWbkI3S9GjHvIYX NuiW477vkbt3CACp82OsghM+DuR6OJDTnEEsW+6B0lYgyMbI3KFDacHh7i1CfNrTkzw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=kernelriot.com; spf=pass smtp.mailfrom=kernelriot.com; dkim=pass header.d=kernelriot.com header.i=@kernelriot.com header.a=rsa-sha256 header.s=kr2026 header.b=YA3oaAqq; arc=none smtp.remote-ip=74.208.142.49 Received: from mail.kernelriot.com (mail.kernelriot.com [74.208.142.49]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 04B4D606A32F; Sat, 7 Nov 2026 10:02:27 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 04B4D606A32F Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=kernelriot.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=kernelriot.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernelriot.com header.i=@kernelriot.com header.a=rsa-sha256 header.s=kr2026 header.b=YA3oaAqq DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernelriot.com; s=kr2026; t=1794045741; bh=+/ah8vkaUP87DIJHEblp3tls1hoAvi5cG63uzTk2jyA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Transfer-Encoding:From; b=YA3oaAqqZeN6mMwRbLlWFxUHJTOS/YV5Tf0YMXVoJGIeGL1kBg3ADZFfe5MNss8vE MIEoobu/aDKNIrDejwSZFcURBEatbOt+BAIuzjkZ12NRCYmeGkrHMnGDIOSWsNpEGL MLf7cp1GrS1iC0Gx4bH5sxaEq5fH4DhVKFjeqsM2x7fbVWaYgtZRG2Ft0H2JG9ORJ6 zI2LEmpGjLw+Yx/XISWN6bbUKkyzu/ViR20cEfpKUwmyJpEkeI11ITx49iO45mk6sZ XwvkqaG4hxP0HO+2XeRh9sURl+EKV0txlu5rE6XO/0QqJ00xhuY0DmB5bfzSISoDvF lMG6KdXpegkHw== Received: by mail.kernelriot.com (Postfix, from userid 995) id 3E6128147A; Sat, 7 Nov 2026 10:02:21 +0000 (UTC) From: Magnus Leatti To: Maxime Chevallier Cc: Andrew Lunn , Jakub Kicinski , davem@davemloft.net, Eric Dumazet , Paolo Abeni , Simon Horman , Maxime Coquelin , Alexandre Torgue , Russell King , Lorenzo Bianconi , Nicolai Buchwitz , thomas.petazzoni@bootlin.com, =?UTF-8?q?Alexis=20Lothor=C3=A9?= , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH net v2] net: stmmac: Clear DMA errors for multi-channel interrupts Date: Sat, 7 Nov 2026 07:01:40 -0300 Message-ID: <20261107100140.8279-1-magnusleatti@kernelriot.com> X-Mailer: git-send-email 2.56.0 In-Reply-To: <179379704484.488856.2140619507341432623@kernel.org> References: <20261103125430.962715-1-maxime.chevallier@bootlin.com> <179379704484.488856.2140619507341432623@kernel.org> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit > Should the Fixes: tag point at 1b9707e6f1a9 instead, or also include it? > As written, stable may backport this to 5.13+ trees that cannot hit these > storms. A data point for the RBU case from the YT6801, same 64-byte UDP RX flood, all on the same 7.0.13 kernel: stmmac from 7.0.13 (has 6ccf12ae111e, not 1b9707e6f1a9): no storm; the MAC interrupt never fires (4 streams for 10 s, and 8 streams plus TX for 30 s) stmmac from 7.2.11, built for 7.0.13: storm, the machine hangs the same, with only 1b9707e6f1a9 reverted: no storm So on this hardware the RBU storm needs 1b9707e6f1a9. I did not test the RPS case. > Since RBU and RPS were enabled only for statistics, was masking them in > multi-MSI mode considered as an alternative? For reference, d3265c19b35d ("net: stmmac: xgmac2: disable RBUE in default RX interrupt mask") took that route for xgmac2. Magnus