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 2F6AD24A06B for ; Fri, 27 Feb 2026 13:25:13 +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=1772198713; cv=none; b=sTho+BUw5dU9X/hDtmpf1CP3Yf+CdhjDyPLM5E5WWFsOjhXQsCW9bdgZucjP2tvVmMFmXbV1jrGHtscXx9ipfwEbuyq7iLf2Fyl8bS2m+ql6lELyjbxDOsvBT0u4Yj/h35UvfAcTAncxg7DO8Y3qD4j0mb6BhrKLMO45ehvzzfw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772198713; c=relaxed/simple; bh=KXcTWENAAi6rryDqPczD27csZ+RGzcGrtgq0IxR0iM4=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=liEPcDjVnK3B2rwtkkCvn/6GzDeqhmHPL08sH45C1BhtZ6GvO/3GmhXYOQLfIy7QMlTb7UyQZIq2VdoGtPv5Q6WoI4KY1eKcQAE5jVQRgfKzErRaKUmk9W5eVLMsiBuLPk2opsokrZgGhHfb8yBSEkMtSD1Pg6OJ7CBQY3eXgrQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=mjqR4Lno; 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="mjqR4Lno" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BAF1BC19425; Fri, 27 Feb 2026 13:25:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772198713; bh=KXcTWENAAi6rryDqPczD27csZ+RGzcGrtgq0IxR0iM4=; h=From:To:Subject:Date:In-Reply-To:References:From; b=mjqR4Lnoj5VcRGrq4eat6d0xHsoFKQIsogC7wqdaKVc4ctKsYX5godCu118kh4g3W YKMVoYx1HwWxUNqG4HzvZ72qyJ/Fa7oyX5PkbNfxNZuphFTPPV3gSNJiPKN44oakkQ HwdPqZYflwjfT1+UzWfofbuQeBrxhXJVAXjeUsZ+uneCIx3m/fd2QpzwJ3+j7GoAjK f4DSkg4ivm+urW5CttWwlV9SWxteyhScgM/ZAftP6SMI0V33Q5YQe6yyI22QekuRV4 fGraZKXzWuP6MqpUOPLwtCjORNWRSP2EnVoVKa6OJwIXA/0t4AnVkLzR0h6pmD4xoI nrLc8nf745P7w== From: Damien Le Moal To: Jens Axboe , linux-block@vger.kernel.org Subject: [PATCH v4 8/8] Documentation: ABI: stable: document the zoned_qd1_writes attribute Date: Fri, 27 Feb 2026 22:19:51 +0900 Message-ID: <20260227131951.2464150-9-dlemoal@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260227131951.2464150-1-dlemoal@kernel.org> References: <20260227131951.2464150-1-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 Reviewed-by: Hannes Reinecke Reviewed-by: Christoph Hellwig Reviewed-by: Bart Van Assche Reviewed-by: Johannes Thumshirn --- 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..900b3fc4c72d 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. This + attribute is visible only for zoned block devices. The default + value for zoned block devices that are not rotational devices + (e.g. ZNS SSDs or zoned UFS devices) is 0. 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