From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1792541415; b=YMf+RO0QtZgFQcMo1bU4bv5wK9iVAaMwQkes+1iETHTSYwPxJM4JTsKo8aChjMVOVsUX fEBiuRp5XECMfyIGfneVt7RRViZIi/zahCtVAXEim54pENDrWZBoIWkRkNuyrzXMr/LK/ ndCY8Z+9eXK/n142JQmG8twEvCF+gYZr8hhQlEu0wb+Qx5pMi4ZwgxoQNaYjFegVuLNUS e6pZITy6kMAGOOBR5HPVQdVriHo9WiZeE5BYOVMn9Le43n+3QYt8qPB4MQIIsqYf/uHtf 3DX1q3HUB1ft2Nkoxn3Sib+4Y/C08pIraes4bYnjt77pFrhLpQ2Nc3nKiHEV0f8SmUw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792541415; h=Received:DKIM-Signature:Received:Content-Type:MIME-Version: Content-Transfer-Encoding:Subject:From:Message-Id:Date:References: In-Reply-To:To:Cc; bh=wofT5zkebqyVszVlAt1/ONTLPuvX9LaDgUNffCT1rws=; b=Vc64UabodNAmFSfTEbtOJsS3vsnlHY12jndKJ59Ovae2cNOmDqVJZF8dm9rn1aAgz0iX PjNCQaOyPO9GXOOz04vZ55BaXmUHn7MPRKnehbtgT6EXeOe8QRzZpQgPsBcAAbB7O/AMW jZGY+gj8V8bEde/1OPVBIb/De3igzNzcWkeyHWPJtjKD65AJBPIjn5ls8cEAj4QiSvHDb gg+aE62AxK2PYJjPd9Obg5FujbcA6gKi/fOfdeXa5Y/WzNua1CTYpkLEp15uIxiMf/ztx qf+XTuCbjr3sOeK/c07qULIqydtFGy6IhUplHbqRFEQ1ay8bkzMb2RoS4CAsCMqfPNQ== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=HtYfjjAq; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9EC43606A31E; Wed, 21 Oct 2026 00:10:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=HtYfjjAq Received: by smtp.kernel.org (Postfix) with ESMTPSA id 455101F000CD; Wed, 21 Oct 2026 00:10:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1792541415; bh=wofT5zkebqyVszVlAt1/ONTLPuvX9LaDgUNffCT1rws=; h=Subject:From:Date:References:In-Reply-To:To:Cc; b=HtYfjjAqAkOchhnCE/U8yb6mVONCWharGasG5A++W2fDi3VgEVM7mb/V1N9jvIis6 jKdYQ4jkWqGrj3OtAFE2VsR/pUnWQhwqcJ1CeWTzPNhm/JJ/JDsRjCZwZaLS7tFzUN yTTpnWUG58OcC6oWjg88fJGgS0WBQmLHOsfYgobIDrMLCfSXG2rgjyxz+t6VARO7cj L9qyo0bN1jJbfK+qA6BqFKeynBiTlHCiR5JMCe/Y+VFXUacwYu9oRbTnGkb5sMyHNc /G0YnUt2vBTWQiyKJ/8v5kNOEcESxNAb6h5NlvKcefi5y0+a7EKBf1r6CL7Y+xpirA TvVnDChQ/YB0A== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id 3A4563809A0C; Wed, 21 Oct 2026 00:10:15 +0000 (UTC) Content-Type: text/plain; charset="utf-8" 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 Subject: Re: [PATCH net 0/2] net: stmmac: Track and report the TX DMA threshold per queue From: patchwork-bot+netdevbpf@kernel.org Message-Id: <179254141377.280032.3757273474047179369.git-patchwork-notify@kernel.org> Date: Wed, 21 Oct 2026 00:10:13 +0000 References: <20261013114503.57487-1-ovidiu.panait.rb@renesas.com> In-Reply-To: <20261013114503.57487-1-ovidiu.panait.rb@renesas.com> To: Ovidiu Panait Cc: maxime.chevallier@bootlin.com, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@kernel.org, kuba@kernel.org, pabeni@redhat.com, mcoquelin.stm32@gmail.com, alexandre.torgue@foss.st.com, xiaoliang.yang_1@nxp.com, netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Hello: This series was applied to netdev/net-next.git (main) by Jakub Kicinski : On Tue, 13 Oct 2026 11:45:01 +0000 you wrote: > On the Renesas RZ/V2H platform, which has two dwmac4 controllers, we > observed sporadic iperf3 TCP TX failures on one of the controllers, with > throughput dropping from >900Mbit/s to ~1Mbit/s due to TX underflows and > the resulting retransmissions. > > Commit 3a6c12a0c6c3 ("net: stmmac: bump tc when get underflow error from > DMA descriptor") made dwmac4 raise the DMA threshold of the queues that > report TX underflows, by increasing a global module parameter 'tc'. > However, this logic does not work correctly across multiple queues and > controllers, and can leave the TX DMA threshold stuck at 64 bytes. > > [...] Here is the summary with links: - [net,1/2] net: stmmac: Track the TX DMA threshold per queue https://git.kernel.org/netdev/net-next/c/9dd534187819 - [net,2/2] net: stmmac: Report the TX DMA threshold per queue https://git.kernel.org/netdev/net-next/c/aee7b59e6e7b You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html