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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0DD39C6FD1F for ; Thu, 21 Mar 2024 22:40:22 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 9EFC96B0092; Thu, 21 Mar 2024 18:40:21 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 9914C6B008C; Thu, 21 Mar 2024 18:40:21 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 880DD6B0092; Thu, 21 Mar 2024 18:40:21 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id 7860C6B0088 for ; Thu, 21 Mar 2024 18:40:21 -0400 (EDT) Received: from smtpin14.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay10.hostedemail.com (Postfix) with ESMTP id 0CBDDC097A for ; Thu, 21 Mar 2024 22:40:21 +0000 (UTC) X-FDA: 81922516242.14.8F13CB2 Received: from verein.lst.de (verein.lst.de [213.95.11.211]) by imf26.hostedemail.com (Postfix) with ESMTP id 415EE14000D for ; Thu, 21 Mar 2024 22:40:18 +0000 (UTC) Authentication-Results: imf26.hostedemail.com; dkim=none; spf=pass (imf26.hostedemail.com: domain of hch@lst.de designates 213.95.11.211 as permitted sender) smtp.mailfrom=hch@lst.de; dmarc=none ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1711060819; a=rsa-sha256; cv=none; b=4dAY6GuXTMojeAWmqBqEvKG2ODU+HANvEeUSQWSCx9u73w7NBNq/uqdEc5lJbhiJpoZEhY U4tJVQVs83xKVBYhTDDMlZpML2N7upxKYH5o4DmA7L7gjwVxr+dvMJS8CEK4Tm93Y7IMM0 SlcT2lRIKUQT21zqYAtbSJFJxqrthZ0= ARC-Authentication-Results: i=1; imf26.hostedemail.com; dkim=none; spf=pass (imf26.hostedemail.com: domain of hch@lst.de designates 213.95.11.211 as permitted sender) smtp.mailfrom=hch@lst.de; dmarc=none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1711060819; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Lg8cIHYnPEpzgSE//BhyaBY+eL/FccLN/ML5Z7XMK3Q=; b=54dRbSulYYYymMGruV6kifgiLYPnH5mDdQ6ebQSMyBF55+mtAvi1mxqSF/5DzjVST8M37f 1aZDtDCdwi1cR1MSgdQu5/WNiPvLAxesEwYGD4Mc1LNcg+gE93KqJeRkkNBfv3wzx6TWUd zaTdjtm9dnjtKjBS04KoJouLv+Qo/pY= Received: by verein.lst.de (Postfix, from userid 2407) id C484568B05; Thu, 21 Mar 2024 23:40:13 +0100 (CET) Date: Thu, 21 Mar 2024 23:40:13 +0100 From: Christoph Hellwig To: Leon Romanovsky Cc: Jason Gunthorpe , Christoph Hellwig , Robin Murphy , Marek Szyprowski , Joerg Roedel , Will Deacon , Chaitanya Kulkarni , Jonathan Corbet , Jens Axboe , Keith Busch , Sagi Grimberg , Yishai Hadas , Shameer Kolothum , Kevin Tian , Alex Williamson , =?iso-8859-1?B?Suly9G1l?= Glisse , Andrew Morton , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, linux-rdma@vger.kernel.org, iommu@lists.linux.dev, linux-nvme@lists.infradead.org, kvm@vger.kernel.org, linux-mm@kvack.org, Bart Van Assche , Damien Le Moal , Amir Goldstein , "josef@toxicpanda.com" , "Martin K. Petersen" , "daniel@iogearbox.net" , Dan Williams , "jack@suse.com" , Zhu Yanjun Subject: Re: [RFC RESEND 00/16] Split IOMMU DMA mapping operation to two steps Message-ID: <20240321224013.GB22663@lst.de> References: <20240306174456.GO9225@ziepe.ca> <20240306221400.GA8663@lst.de> <20240307000036.GP9225@ziepe.ca> <20240307150505.GA28978@lst.de> <20240307210116.GQ9225@ziepe.ca> <20240308164920.GA17991@lst.de> <20240308202342.GZ9225@ziepe.ca> <20240309161418.GA27113@lst.de> <20240319153620.GB66976@ziepe.ca> <20240320085536.GA14887@unreal> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240320085536.GA14887@unreal> User-Agent: Mutt/1.5.17 (2007-11-01) X-Rspam-User: X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 415EE14000D X-Stat-Signature: j8gd3roguhcaa1fcm5pkieakq6rwoo5t X-HE-Tag: 1711060818-301925 X-HE-Meta: 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 RQC+U2Gk xYUJNiUtX9kYk4E0OaKz2gCZPtmyFodQoaHSk4I69v9xCg/Ih8jTqLReUrO37V11aSgc70L5CeP0es6tkt9/DRxYGzQ== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, Mar 20, 2024 at 10:55:36AM +0200, Leon Romanovsky wrote: > Something like this will do the trick. As far as I can tell it totally misses the point. Which is not to never return non-P2P if the flag is set, but to return either all P2P or non-P2 P and not create a boundary in the single call.