From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtpout-04.galae.net (smtpout-04.galae.net [185.171.202.116]) (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 4AF4C39A7F7 for ; Fri, 16 Jan 2026 18:27:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.171.202.116 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768588051; cv=none; b=dubW2V4jxm5iaRHk0UyrIIYywpORkVcagIY6Wni8G/6VGRJWMSrYN/4Nv30voBRhomiYXUfhyZp9QAcKcoY8hFgZXjOovBV8u3Sp1MaYDbvoqpozFKu8EtOtd54V/qjknOOUaSkAEc+QhozpEAuxUJ5R8NbG3GsboFQG2Egcckw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768588051; c=relaxed/simple; bh=rKVfbx5b3NHIz96zrGog3gdN7qEDREG19ZAC1KiUd3A=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=EEC8XRojAH0R2/YArP494StLrbdGmdeRsOqEn8yy5DcSePb5VorkGFEOfW0QaCn1/ZBRAZGjLx+z1Mq06XDoJmwMWQxd4TpSHbxCwaeW8y5hIeJ++y1CF+r0J6LnIWxTGMVuX/DtfCHBHkAazijwwWQXYEqSVlvIQZyKm7vvszE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=RFgRY2sI; arc=none smtp.client-ip=185.171.202.116 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="RFgRY2sI" Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-04.galae.net (Postfix) with ESMTPS id B5F7AC1F1FD; Fri, 16 Jan 2026 18:26:57 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id 6817C606F9; Fri, 16 Jan 2026 18:27:24 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 616D010B68C23; Fri, 16 Jan 2026 19:27:17 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1768588043; h=from:subject:date:message-id:to:cc:mime-version:content-type: content-transfer-encoding:content-language:in-reply-to:references; bh=M9QR7Zfctf+mqpFF5OtHWXHDrgz/+4rKeF7GVZtlVBo=; b=RFgRY2sIGvEGUEUZPSs3f1xmwal9VBo1eHybEb1WaE5/CQo5uZtqT8e2GY+NEad65eBC+w k5ky8nxJhCdQeByMFpc27f654Pd7C0iRNtLloxAUEkFPP0oFNoAd7WvcCu8XiAbC5n5Ikw 69Fb+6Zyu2h5J2aeI20XHtOIvf66GY45GhK09KvzEeKiZVhopIS70FjyR2IP8wip5cvznJ LPrpz9uwt8oC3HYNW4e1Tdm0gdc05lW1rktDb599MG4wVpNcgyf6aKwYEYF/VlFCqAO35f Bkbu8DWGw/PSg7CoMQPmdaF8XPdpDgSlSg2bUM1a7Xs0DH47I8oc02qEHCMnuA== Message-ID: <3a93c79e-f755-4642-a3b0-1cce7d0ea0ef@bootlin.com> Date: Fri, 16 Jan 2026 19:27:16 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH net v2] net: stmmac: fix transmit queue timed out after resume To: "Russell King (Oracle)" Cc: Tao Wang , alexandre.torgue@foss.st.com, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, horms@kernel.org, kuba@kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, mcoquelin.stm32@gmail.com, netdev@vger.kernel.org, pabeni@redhat.com References: <20260115070853.116260-1-tao03.wang@horizon.auto> <6a946edc-297e-469a-8d91-80430d88f3e5@bootlin.com> <51859704-57fd-4913-b09d-9ac58a57f185@bootlin.com> From: Maxime Chevallier Content-Language: en-US In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Last-TLS-Session-Version: TLSv1.3 Hi, On 16/01/2026 19:08, Russell King (Oracle) wrote: > On Fri, Jan 16, 2026 at 01:37:48PM +0000, Russell King (Oracle) wrote: >> On Fri, Jan 16, 2026 at 12:50:35AM +0000, Russell King (Oracle) wrote: >>> However, while this may explain the transmit slowdown because it's >>> on the transmit side, it doesn't explain the receive problem. >> >> I'm bisecting to find the cause of the receive issue, but it's going to >> take a long time (in the mean time, I can't do any mainline work.) >> >> So far, the range of good/bad has been narrowed down to 6.14 is good, >> 1b98f357dadd ("Merge tag 'net-next-6.16' of >> git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next") is bad. >> >> 14 more iterations to go. Might be complete by Sunday. (Slowness in >> building the more fully featured net-next I use primarily for build >> testing, the slowness of the platform to reboot, and the need to >> manually test each build.) > > Well, that's been a waste of time today. While the next iteration was > building, because it's been suspicious that each and every bisect > point has failed so far, I decided to re-check 6.14, and that fails. > So, it looks like this problem has existed for some considerable > time. I don't have the compute power locally to bisect over a massive > range of kernels, so I'm afraid stmmac receive is going to have to > stay broken unless someone else can bisect (and find a "good" point > in the git history.) > To me RX looks OK, at least on the various devices I have that use stmmac. It's fine on Cyclone V socfpga, and imx8mp. Maybe that's Jetson specific ? I've got pretty-much line rate with a basic 'iperf3 -c XX" and same with 'iperf3 -c XX -R". What commands are you running to check the issue ? Are you still seeing the pause frames flood ? Maxime