From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 9E91A310763 for ; Sat, 21 Feb 2026 00:49:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771634973; cv=none; b=jirJKHfSSHeOX90eeuCOUJSH1SF6PH1ndtHEwk+JLwI0htFdUPfCyL2vbWqozgmGr+VRsBOJcn59IXOYzVbUQRljbhYdJSjcvDsEG4XKFSdzszr1u0S5oymlp9x2ZOK+UM8MXX5VvDtmCAzZpzVHd3iUNlVYojJosdvccPYZkgg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771634973; c=relaxed/simple; bh=9+piLGIlhGikW0UE1wJQj2lZ9YaxsAw0pRW8O+OD9Ow=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=MbzzmQ3EdJI+Rtt3qrJwA4R423lp0qxcvT/ddCaOGje/KHmDIdK10IH4gJUXuswhE3FXLBiExqWaFvYZeDh3f0jXPJ8CvDacytBWZuuqYsM3fg1uPnQIxRM9iDx6ev+gY6P2QNVgVRHFtJVPJx2orFFpOCTkJoXsmKE51fPWJ+Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=rVQdyAdX; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="rVQdyAdX" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3E390C116C6; Sat, 21 Feb 2026 00:49:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1771634973; bh=9+piLGIlhGikW0UE1wJQj2lZ9YaxsAw0pRW8O+OD9Ow=; h=From:To:Subject:Date:In-Reply-To:References:From; b=rVQdyAdXO0yDj7r48rua/+PQzQPp17aLfW9mSVh/95EbAy8yH0085YJb0CH+uiPRz 6xju7NTDRzOpACswNdCUk62T9aPYba7srbRfeTDED9yQb0u6v06PXYljDJdATqKp3s j00UgWJ45UbN9uEO+euoLnQPk5BBbyR1sV4tnsLfnAF3FJaTFVogu0AvrRiz2W9ver 8HjJue9MUjf0Ku21jGhvMinro6W8pP0rRHBl+YK74AiXRXtCWdvN5z+orzurvI23di ER6r3c7XO+F98U2dilQPz3fGW4SNV2kw0QLzHjrO5rWPjhL+oBnBn7uaCw2pSdnFOo 1XfN53iQureEw== From: Damien Le Moal To: Jens Axboe , linux-block@vger.kernel.org Subject: [PATCH 8/8] Documentation: ABI: stable: document the zoned_qd1_writes attribute Date: Sat, 21 Feb 2026 09:44:11 +0900 Message-ID: <20260221004411.548482-9-dlemoal@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260221004411.548482-1-dlemoal@kernel.org> References: <20260221004411.548482-1-dlemoal@kernel.org> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Update the documentation file Documentation/ABI/stable/sysfs-block to describe the zoned_qd1_writes sysfs queue attribute file. Signed-off-by: Damien Le Moal --- Documentation/ABI/stable/sysfs-block | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/Documentation/ABI/stable/sysfs-block b/Documentation/ABI/stable/sysfs-block index 09a9d4aca0fd..bc3056af5eb2 100644 --- a/Documentation/ABI/stable/sysfs-block +++ b/Documentation/ABI/stable/sysfs-block @@ -886,6 +886,21 @@ Description: zone commands, they will be treated as regular block devices and zoned will report "none". +What: /sys/block//queue/zoned_qd1_writes +Date: January 2026 +Contact: Damien Le Moal +Description: + [RW] zoned_qd1_writes indicates if write operations to a zoned + block device are being handled using a single issuer context (a + kernel thread) operating at a maximum queue depth of 1. A value + of 0 is always reported for regular block devices and for zoned + block devices that are not rotational devices (e.g. ZNS SSDs or + zoned UFS devices). For rotational zoned block devices (e.g. SMR + HDDs) the default value is 1. Since this default may not be + appropriate for some devices, e.g. remotely connected devices + over high latency networks, the user can disable this feature by + setting this attribute to 0. + What: /sys/block//hidden Date: March 2023 -- 2.53.0