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=1794302372; b=2huO0LPAwNVyObR34wkKrcX/DoiMVKM1BVSq+c3WoFRoDsx0nDfWZZ1dYPqK16E3vnkJ 6dAOLDxJceYi2YKAfDeNFofEKB1JSJl+VV/3QVJuQ3rDtQdS/9MxsvJtHCrFL6eqFKrxt OeRLFJNUzyOqL7cn6+glB09TOObwhKeZh2ImncVUHSra/dbUs3mv47IYXd1CKx6mdt1NB /B4riEyqrWDi1Qvl1Jvoe0TCilz2TdUMuaautvwz6ZKUsG9rtl+YJAsrXstlFMDthXue4 VUAFIg6sTfqqe+sngEvsF83NustoV4so2W2xWvX4A5yAG8KgNwydM+TuLTfAvd+eLGQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794302372; 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=RqKb78p7qpWJlKAs1Itlkd98Zkf/qvmrWv/pFqO1J5I=; b=LtloZVQnbJMMfkobXV3UtxJJLRJ5ZWstGtbSN0RkQ/lpISg6832vpSPS9lGCY6oeuJdP Tg6M8wVRsOdr9JlueRHSP2O40O/LA2AXJYE6uBD/WWzAbUrRmT0ZJroaO7+t6NEwLnzrw Nj/XZ4dHUCMH466cIVA6fc+GJHcMCgMTRaPAUuhUXDlN2fUCQGARm1tk7IgnLetLtyLw+ CzaKVPIB6NmLZmngCiRN7tLbV7Kvphdi2mNDP+7gwIoDD+IsaAdb1xdr+Ws7m3KtpCeqH 8Li0hiXP3w4FTzOMHmj8up7tNKEMPjqRUJWbgk/o+XQNyoypFcTNxbqOSHIBsxitmwQ== 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=GXKfaXPR; 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 C982460A380A; Tue, 10 Nov 2026 09:19:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org C982460A380A 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=GXKfaXPR DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernelriot.com; s=kr2026; t=1794302365; bh=kQBTjdYh2JWmkBfDmSwwc/2rdQED1OQpth8b7MZf1hQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Transfer-Encoding:From; b=GXKfaXPRHbJgZTRCX20dK30P3/GvXQmtvZc5FWdvRQYvseCs/iN8D2DltZjpckMND plrKIspEqStfKqIIwcFNS+L57fFJJp7Jp7msEezv965i8O9VHmFJGXa3ZJ/UqREdDF 8ur0jpgCMdGqXZZFAFQoFe8QuuKWT2g9YlOd9uDMAD2bO35/gpCm893tOKykrkqX5Z Jy+qwEQskvlv9wV/VytJzBIdi3t8oZS8kZ+D3IlMJXWky0S3fl3/88FHl0/4TWymBT Fj75cIZkA6javPnvgswqBP4SeSP2FuxgkIIq1Ni+RaDTG0m4gNhIRbbbVOMlk8BGK9 fTKTKh6jisY2w== Received: by mail.kernelriot.com (Postfix, from userid 995) id 515E781428; Tue, 10 Nov 2026 09:19:25 +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: Tue, 10 Nov 2026 06:19:01 -0300 Message-ID: <20261110091901.7080-1-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 > Since RBU and RPS were enabled only for statistics, was masking them in > multi-MSI mode considered as an alternative? Hi Maxime, Tested that route on dwmac4 (YT6801, 7.3.3) next to v2. Stock 7.3.3 dies in 4s under a 4x 64B UDP flood (122k irq/s storm). Both v2 and dropping RBU from the abnormal mask survive with the same ~3M RX frames within noise (3 runs each, alternating), but: v2 (A) no RBU irq (B) MAC irqs: 18k - 43k 0 rx_buf_unav: 9k - 21k 0 %irq CPU: 3.9 - 7.1 1.1 - 1.5 RX frames: 2.5M - 3.0M 2.8M - 3.2M Same on 8x UDP + TCP TX (30s): both stay up, A takes up to 33k MAC irqs, B takes 0. Caveats for B: - Core is a 5.2, so only the 4.10 mask was exercised. - RPS never fired, so this doesn't test the RPS storm fix from v2. - rx_buf_unav_irq stays at 0 (pre-1b9707e6f1a9). Want RBU dropped from the dwmac4 mask too? Can send a patch or you can fold it into v3. Magnus