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 5A934C433F5 for ; Mon, 24 Jan 2022 13:06:06 +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=Py/6hsJC+imvSVCfXl/4sc0rc23XQ3G/ejBfkYEVx/Y=; b=sEvvoH0/qBm4jfqoraI4KvcPqB xN9FuHzeBjMPoTT8V6qwuO7MMsI5Eagu/UZaUxMgfZ6L5sMykj62axvHiLAzpOLfKiz9RBY+vedkL XpTKuLYReA8auko0GjZlB9ybUWf2JwZrf6xnt/jq2TgtmEdKc/yBce6lEnemHEjnHOYM67dIuN3tU mnc++QK2GDuxd+klVCnzFEqwj8TRx8R6r4idSiUBJF7DnJL02ffq+nVKLiZ/YdoWJgpE5qnq6LyKD T6bGxXKD+38ttvSZkNvAEGPG84hmEPdtLXFaILiT5LQOysNkrbXmkes2PeHi0hUwQtQZ+lYFFGook gXkXJuPQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nBz2n-003NSE-N0; Mon, 24 Jan 2022 13:06:01 +0000 Received: from verein.lst.de ([213.95.11.211]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nBz2k-003NR2-G7 for linux-nvme@lists.infradead.org; Mon, 24 Jan 2022 13:06:00 +0000 Received: by verein.lst.de (Postfix, from userid 2407) id 4116668C4E; Mon, 24 Jan 2022 14:05:55 +0100 (CET) Date: Mon, 24 Jan 2022 14:05:55 +0100 From: Christoph Hellwig To: Ming Lei Cc: Christoph Hellwig , Jens Axboe , "Martin K . Petersen" , linux-block@vger.kernel.org, linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org Subject: Re: [PATCH V2 05/13] block: only account passthrough IO from userspace Message-ID: <20220124130555.GD27269@lst.de> References: <20220122111054.1126146-1-ming.lei@redhat.com> <20220122111054.1126146-6-ming.lei@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220122111054.1126146-6-ming.lei@redhat.com> User-Agent: Mutt/1.5.17 (2007-11-01) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220124_050558_734831_97096ABF X-CRM114-Status: GOOD ( 15.48 ) X-BeenThere: linux-nvme@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-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org On Sat, Jan 22, 2022 at 07:10:46PM +0800, Ming Lei wrote: > Passthrough request from userspace has one active block_device/disk > associated, so they can be accounted via rq->q->disk. For other > passthrough request, there may not be disk/block_device for the queue, > since either the queue has not a disk or the disk may be deleted > already. > > Add flag of BLK_MQ_REQ_USER_IO for only accounting passthrough request > from userspace. Please explain why you want to change this. Also this is missing I/O from /dev/sg, CDROM CDDA BPC reading, the tape drivers and bsg-lib.