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 D2B2AC982FA for ; Tue, 22 Sep 2026 13:23:32 +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=AnhlRlntuCOOQ0ioYwE6+BbEmASXZbGplo3IMB2V950=; b=zjFTygG09sRX6+/Uo3P40vrMq2 K03+avq7Lt33Z0kmlRXh8AF1hl6zlRakA2z18KDeBDQ46kV0bEYNO+1uXhebUkgXHiBe2st9W0lLg 64l5rwHbpBtFzXTJMltnWZjvZnOKC5fope4Vt25E3fJWFutnTqOep6ANPaE43YjQEUykxYggyC+7W ejueGKCWpIaxCBcuF7kypjoDFfRmKUWwhTa4Pef4laMJ/kSBB+5ygxmUSiqIGFm5fP/iROaXMCI5f MSevSr6/dADeqMBgTujshdYkoHtJRiWaqVyw8as8Awtjlr1Pfjk8xeYQdyz/U0wnBn/mQBiXgWq1J Z4p/iUjw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x90Sv-00000005VTS-2Unb; Tue, 22 Sep 2026 13:23:21 +0000 Received: from verein.lst.de ([213.95.11.211]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1x90MC-00000005UKI-2wNq for linux-nvme@lists.infradead.org; Tue, 22 Sep 2026 13:16:26 +0000 Received: by verein.lst.de (Postfix, from userid 2407) id A774668C4E; Tue, 22 Sep 2026 15:16:11 +0200 (CEST) Date: Tue, 22 Sep 2026 15:16:10 +0200 From: Christoph Hellwig To: Pavel Begunkov Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, linux-nvme@lists.infradead.org, linux-fsdevel@vger.kernel.org, io-uring@vger.kernel.org, Christoph Hellwig , Sumit Semwal , Christian =?iso-8859-1?Q?K=F6nig?= , Keith Busch , Sagi Grimberg , Alexander Viro , Christian Brauner , Jan Kara , Andrew Morton , Jens Axboe , Nitesh Shetty , Kanchan Joshi , Anuj Gupta , Tushar Gohad , William Power , Phil Cayton , Matthew Brost , Alasdair Kergon , Mike Snitzer , Mikulas Patocka , Benjamin Marzinski , dm-devel@lists.linux.dev Subject: Re: [PATCH v6 04/13] block: introduce dma map backed bio type Message-ID: <20260922131610.GA30468@lst.de> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260922_061624_895639_A8948894 X-CRM114-Status: GOOD ( 13.10 ) X-Mailman-Approved-At: Tue, 22 Sep 2026 06:23:21 -0700 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 Mon, Sep 21, 2026 at 02:38:48PM +0100, Pavel Begunkov wrote: > Premapped buffers don't require a generic bio_vec since these have > already been dma mapped. Repurpose the bi_io_vec space to strore dmabuf s/strore/store/ Can you please expland on the splitting considerations a bit? Preferably both in a comment for the details, and in the commit log for how we arrived at them and why they are fine for now? Otherwise looks good.