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=1794416659; b=DqiPDxwv17UxFpJyozIN7dTmJn0qAq1dDHdZD77Rf6XU+EP6h4HsSWr6+c8ocB43lbNo EXbR2jbt5B5q4xXmLHKHgy/g5PgQodSfRfgPMUvITu2jB3IxsO51JU9C8VL7Hb2x6gzlr WIsLlqqc+JvG6kf30CboNykxj1tAtsSN90rnKPrWDwsZMKS3gf81fuCrNNoEdnBJxQ6EV op38irYZa3mbP0tW4793AostOCnwQQyl+Aw2faw5PKBulji3lQirDHqttfzZRAgg2qrpV uxNjcuFXsGRpQ6zqSwK2w9fxNF6o/bT7JxLul6gLC7YIasppbI3356jt0n7/KlLKROA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794416659; h=Received:DKIM-Signature:Message-ID:From:Subject:Reply-To:To:Cc: In-Reply-To:References:Content-Type:Content-Transfer-Encoding:Date; bh=u8Ty3HMMMgR42+PP+L/DzYcGfH7I2/ZGMWkY9tvSChw=; b=1QyCdVNwSZMj48FHiuiXkJ+lp+lvNSKXcweQxhtyCQ4MxmRZtCzXRW0eD3D0jYYeAgB/ WL9sWUVfV7VIYpaHF8Zw4z7VuHj7sMhzFs6+tpORXGQPNX8R8syfwPDxbTWMvm7kS0y8W XftfyGQnLpFcThb93trNvsePINuefdL4PVjhQQaK5a7VkukcTWjldObXS/dZs0tMonJ/j qCRZxkVREQcZSlfX8L8FRsLr41owzYikbe/BUfwX7lhshpUlrFMFQjMrwS+B83aj2A7yV RtnL/6caoSr8uhqMl+bpigJxn6kmJcc9N9UgHzNMscBt4gv61qTyzEsgFTUDbTyvG9w== 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=dIxrqUug; 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 9250860A2610 for ; Wed, 11 Nov 2026 17:04:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=dIxrqUug Received: by smtp.kernel.org (Postfix) with ESMTPSA id F33B91F00A10; Wed, 11 Nov 2026 17:04:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794416659; bh=u8Ty3HMMMgR42+PP+L/DzYcGfH7I2/ZGMWkY9tvSChw=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=dIxrqUugSVJ0XRwvNonLx0P9510JjHrioQ51z4FWX3/tVDSOI/BQC3jJNwMYQ8zKW uT4euoKbVx5hL2EeOnwLCIodySk2R/UrwBit1X3sALFYXUvj4cZKlouYQcstdVPqnL +JdqXPA6sLhcnR1sCdhk8iPrlpQ3URwaA6ObdXzxyZh0KEnK8rUPk6hdDrXoX3HjpA JH2pOvm9hQoMlGTQHEiKbSQw1VWAcE3dOwbUX49rpFRYAOvf9R/6QLktJ+70sUIHvt dKzJcyicaprHj2AnYemh74o8i+riTSU7JOl/rASk2QbkYe85Rco0hq+tAoqAiw6LFH pwoTylBZHYhhA== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH RFC] PCI: Start the reset of WD PC SN730 NVMe controllers early Reply-To: sashiko-reviews@lists.linux.dev To: "Paul Menzel" Cc: linux-pci@vger.kernel.org In-Reply-To: <20261111163145.75027-2-pmenzel@molgen.mpg.de> References: <20261111163145.75027-2-pmenzel@molgen.mpg.de> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Wed, 11 Nov 2026 17:04:18 +0000 X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list > [Please consider this a bug report.] >=20 > On a Dell XPS 13 9310 (BIOS 3.17.0) with a WD PC SN730 1 TB (15b7:5006, > firmware 11170012, the newest available for this OEM drive), about one > boot in ten mounts the root file system 100 to 700 ms late. With the > nvme module probing at 0.29 s from a small initrd, the time from probe > to Identify grows from 9 ms to 74 to 229 ms, and the partition table > read and the mount get slower too: >=20 > nvme nvme0: pci function 0000:01:00.0 [0.293894] > nvme nvme0: passthrough uses implicit buffer lengths [0.522525] (+= 228.6 ms, usually +9 ms) > nvme0n1: p1 p2 p3 p4 +27.3 ms (us= ually 3 ms) > EXT4-fs (nvme0n1p3): mounted filesystem +82.2 ms (us= ually 8 ms) >=20 > Tracing nvme_disable_ctrl() and nvme_enable_ctrl() with function_graph > [ ... ] >=20 > That boot was not traced, so whether the reset outlasted the 100 ms head > start or the enable was slow is unknown. >=20 > Signed-off-by: Paul Menzel Sashiko has reviewed this patch and found no issues. --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20261111163145.7502= 7-2-pmenzel@molgen.mpg.de?part=3D1