From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B7C2CD232F2 for ; Fri, 9 Jan 2026 08:38:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=a98W+72H+QrvZTa+W7QmD1B9sIhKMP4/j8pKEcILt+U=; b=M1OkHGWDezOpgdI88yRrT0kzAT 8QcahjRQNOqhBebJ2dT4yFq69fnE1V0IgnHRC5shGYllAuu1XWBLyMWeKiOfHhBsUbM/lwlPHVCAc OeFJkhkRGqjg4UxDGcNa51f6rMT/8kBpNPEbNm1sFeUKciRKxiV/XN5u8BE/JYiEE13ZIvvs9cJs9 R361jPWIbTl2VH/MqGpUkKYH8/KnVCVBNe+5gPZY5JbDxToO7LiiE8VOzvZyH/+vGAs5SdX5ghjOU cbSO39HUMP8buNkpa3qHd4is8Lxlc7pZrLlNK0ZVTDD9Dp5AaLS8PfLQrxgaZVf9bXMxT0GnK37gx ATJpb5FA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1ve81B-00000001vBr-25g1; Fri, 09 Jan 2026 08:38:49 +0000 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1ve818-00000001vAw-2c6U; Fri, 09 Jan 2026 08:38:47 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id ACC50443E2; Fri, 9 Jan 2026 08:38:45 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7B998C2BCB0; Fri, 9 Jan 2026 08:38:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1767947925; bh=a98W+72H+QrvZTa+W7QmD1B9sIhKMP4/j8pKEcILt+U=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=AsCBqrk0vvLVhmih7qPc+AeKhH4Pu47oQfOdgYtmjO9go4kvStnPT8U3A8pvQHnNI j/2kTuMLpbzENN+/r4sdyNRrbMSiLsPU71fe7eBoMNvAgrKGKZLhzrjeuwruQMKK74 wJ+PPJWdBrCml+yurM4+bZY6f7ptpb3sNGKBg7TAlvPCnZCfYLvW19QGbfJTO0W2YC hnVk5mUB7BbOWQBXqdlnjBBzil5KyFGzn9Z/Op3ivQM9ivLZ5W2d66JSiFwFqDgwMT ZqLE5NpDbCE/od6DnBMdYLvrcwA7gtQwDR96DDsVAghy/rf4TUUsZvH2HFWO2/rybu KFcL9DzNhOKTA== Date: Fri, 9 Jan 2026 09:38:38 +0100 From: Niklas Cassel To: Hans Zhang <18255117159@163.com> Cc: lpieralisi@kernel.org, kwilczynski@kernel.org, bhelgaas@google.com, helgaas@kernel.org, heiko@sntech.de, mani@kernel.org, yue.wang@amlogic.com, pali@kernel.org, neil.armstrong@linaro.org, robh@kernel.org, jingoohan1@gmail.com, khilman@baylibre.com, jbrunet@baylibre.com, martin.blumenstingl@googlemail.com, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-amlogic@lists.infradead.org, linux-rockchip@lists.infradead.org Subject: Re: [PATCH v7 0/2] PCI: Configure Root Port MPS during host probing Message-ID: References: <20251127170908.14850-1-18255117159@163.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20251127170908.14850-1-18255117159@163.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260109_003846_677757_29F7750E X-CRM114-Status: UNSURE ( 6.89 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, Nov 28, 2025 at 01:09:06AM +0800, Hans Zhang wrote: > Current PCIe initialization exhibits a key optimization gap: Root Ports > may operate with non-optimal Maximum Payload Size (MPS) settings. While > downstream device configuration is handled during bus enumeration, Root > Port MPS values inherited from firmware or hardware defaults often fail > to utilize the full capabilities supported by controller hardware. This > results in suboptimal data transfer efficiency throughout the PCIe > hierarchy. Hello PCI maintainers, any chance for this series to be applied? Kind regards, Niklas