From patchwork Tue Aug 6 12:06:41 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Wagner X-Patchwork-Id: 13754713 Received: from mail.nearlyone.de (mail.nearlyone.de [49.12.199.46]) (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 2F1851C8FC5; Tue, 6 Aug 2024 12:07:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=49.12.199.46 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722946054; cv=none; b=rDgjIN5tV64sisCISR2WNa+AZ8GFOcDh0ge2ZgaUOACKhTJ09JW+qL5XbBqHYtT3og6dlmKFy3UrRTtNwjQU/J6nz0ZRRIdq4v6girKTntQ8BooN0/PKIh6G32Qqyw8VlVwWu4OVXkVlFH3fW0dAvzPTyTFXoI506besKNuwAHc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722946054; c=relaxed/simple; bh=NTwierF+ULzrvJ4PzlC1WFNv9YJBBGWqvE6qmk+TK44=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=uzHx7FPfPHW+hY+YvTO1SKiHDvnJb5lBKoj+uXsp+BURSRF1WuZJdkwmZBs9HA9V6zVbgY2qX8kh7rc5wS1SUMRaHoFiPBmcmzFBBW9sPE9bjofBvODP5xoJoNz2JiH1NN31Cwh5X9z6HKh5tSXT26sf/pMpsVvJbG9Zki7TQFs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=suse.de; spf=pass smtp.mailfrom=monom.org; dkim=pass (2048-bit key) header.d=monom.org header.i=@monom.org header.b=p7iY69/b; arc=none smtp.client-ip=49.12.199.46 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=suse.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=monom.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=monom.org header.i=@monom.org header.b="p7iY69/b" Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 7D371DAE1E; Tue, 6 Aug 2024 14:07:29 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=monom.org; s=dkim; t=1722946050; h=from:subject:date:message-id:to:cc:mime-version:content-type: content-transfer-encoding:in-reply-to:references; bh=Da27AApIHCmREbL3F0FCZ+1oP8ihlsnaa1F9fgrccaw=; b=p7iY69/bJJXFtotZvjZBtrSM+GmEiKE449uaYkdFqaek4eNU7XBLty3NVL8BO/PnByYyO1 bd5fZ47jjUCnPnScikX/WqWy5N/WSb6iBPrFrnNja2YLGJMv5fAMrpLXjMdLiDXp7/XsSA vKriLqtXVZ8fYwf9pUT/x/19tNsYETy8oSq5cQ1eiqReqoOEAhQuXzWlS9Vx1GbQQq9O4U 6Fa6KLhEiOXnRHgiqZJK6SE7xh/V/AYklPmIWAvPgJFv4JkmXF6bW8+vDHWIH5ETCj0hvz 8UlLLCM4YncXPIL9McUpI5vgCMt4SXdgLDAk07Bz3T+dL7/DjMYqBdeNn9TAPw== From: Daniel Wagner Date: Tue, 06 Aug 2024 14:06:41 +0200 Subject: [PATCH v3 09/15] docs: add io_queue as isolcpus options Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240806-isolcpus-io-queues-v3-9-da0eecfeaf8b@suse.de> References: <20240806-isolcpus-io-queues-v3-0-da0eecfeaf8b@suse.de> In-Reply-To: <20240806-isolcpus-io-queues-v3-0-da0eecfeaf8b@suse.de> To: Jens Axboe , Keith Busch , Sagi Grimberg , Thomas Gleixner , Christoph Hellwig , "Martin K. Petersen" , John Garry , "Michael S. Tsirkin" , Jason Wang , Kashyap Desai , Sumit Saxena , Shivasharan S , Chandrakanth patil , Sathya Prakash Veerichetty , Suganath Prabu Subramani , Nilesh Javali , GR-QLogic-Storage-Upstream@marvell.com, Jonathan Corbet Cc: Frederic Weisbecker , Mel Gorman , Hannes Reinecke , Sridhar Balaraman , "brookxu.cn" , Ming Lei , linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org, virtualization@lists.linux.dev, megaraidlinux.pdl@broadcom.com, mpi3mr-linuxdrv.pdl@broadcom.com, MPT-FusionLinux.pdl@broadcom.com, storagedev@microchip.com, linux-doc@vger.kernel.org, Daniel Wagner X-Mailer: b4 0.14.0 X-Last-TLS-Session-Version: TLSv1.3 isolcpus learned a new io_queue options. Explain what it does. Signed-off-by: Daniel Wagner --- Documentation/admin-guide/kernel-parameters.txt | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index f1384c7b59c9..a416cc969e97 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -2446,6 +2446,15 @@ housekeeping CPUs has no influence on those queues. + io_queue + Isolate CPUs from IO queue placement by + multiqueue drivers. Multiqueue drivers are + allocating and distributing IO queues on all + CPUs. When this option is set, the drivers will + allocated only IO queues on the housekeeping + CPUs. This option can't be used toghether with + managed_irq, use one or the other. + The format of is described above. iucv= [HW,NET]