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 D4DBCC54E71 for ; Fri, 22 Mar 2024 17:46:29 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 464CA6B007B; Fri, 22 Mar 2024 13:46:29 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 3EDDF6B0082; Fri, 22 Mar 2024 13:46:29 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 267716B0083; Fri, 22 Mar 2024 13:46:29 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 1258D6B007B for ; Fri, 22 Mar 2024 13:46:29 -0400 (EDT) Received: from smtpin18.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id D2E251C0A22 for ; Fri, 22 Mar 2024 17:46:28 +0000 (UTC) X-FDA: 81925404456.18.694F553 Received: from sin.source.kernel.org (sin.source.kernel.org [145.40.73.55]) by imf14.hostedemail.com (Postfix) with ESMTP id AAACB100005 for ; Fri, 22 Mar 2024 17:46:25 +0000 (UTC) Authentication-Results: imf14.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=ZHS5yTT4; spf=pass (imf14.hostedemail.com: domain of leon@kernel.org designates 145.40.73.55 as permitted sender) smtp.mailfrom=leon@kernel.org; dmarc=pass (policy=none) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1711129586; 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:dkim-signature; bh=Oy/Nq6PcY2bcQc0QCruyagdbdVr8kaFsWqEhNH327PI=; b=Nv1EcgD546zLuacuTj4goQYQvS79mgi7VfIeLaT438ZtoEPe0FIFIBS1jAbRN0YIP/f0eD DCVGDBufuQj5M7gN/ts6UYwWgx/zpaufDobhGQs11rcM9qpA6pH7a+SYA6JXz8lFRaexOi v/krn70KRlYNYBBsg28uOhgsSNTMdvQ= ARC-Authentication-Results: i=1; imf14.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=ZHS5yTT4; spf=pass (imf14.hostedemail.com: domain of leon@kernel.org designates 145.40.73.55 as permitted sender) smtp.mailfrom=leon@kernel.org; dmarc=pass (policy=none) header.from=kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1711129586; a=rsa-sha256; cv=none; b=s5RVJR6AvfJIyVbpmMMvd2+H4gE/Ooh+E8+CO9Qd1kVqxVW/+eOeD+z2aN34wqKLMD8zIC JD3DFmDKeT6OfkIaQsajq6CNUMJyM+sXcXA6zvYxrzIU+y5KFVGLXoY1ezKwqGFu6suGBM j9Rv/nT3JCesLQgWu/GuLyu5ekZhHT0= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sin.source.kernel.org (Postfix) with ESMTP id 4C856CE1867; Fri, 22 Mar 2024 17:46:22 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B06FDC43390; Fri, 22 Mar 2024 17:46:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1711129581; bh=tPnSfU7iDXbv5Aanu3qQZ/bdHhZW5HEkKrMaj/r/t3E=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=ZHS5yTT4bbaMRlgftNPH4s3/BHy6Y/pMfuNyl8v8f5cbM9wT0nJywOThE9XO9o+Yo sQrbBVvHpfJ/GkmHADMgsyejjED5TS3WA9xA7CAd8LGMMBj72qkOP6L4xJgAnibISZ qNFyWWuGRtKqmNbYceSiJMbEfqG1Js9LGbaa9G2SXsAMGNlvbn99etRqhzGPHQquR2 /pbuuEEFXd6WzmZyO515+46vj9pZRkjqcnsndSlqoffLvES8FRzNSO3QY42zxkNADr DC5hb9KvKEkeYTKUZ64FdwpBihsRuGbAw0oCeOVQ5Q/D7ca6clZI9B8s4YtiHLB9rj nO/n9c2+vHn/w== Date: Fri, 22 Mar 2024 19:46:17 +0200 From: Leon Romanovsky To: Christoph Hellwig Cc: Jason Gunthorpe , 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: <20240322174617.GD14887@unreal> References: <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> <20240321224013.GB22663@lst.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240321224013.GB22663@lst.de> X-Rspamd-Queue-Id: AAACB100005 X-Rspam-User: X-Stat-Signature: 83914y4u65bs1onhgofta5m5u559dqhq X-Rspamd-Server: rspam01 X-HE-Tag: 1711129585-63872 X-HE-Meta: U2FsdGVkX1+J9WjdRb0r5+4hduYMv4Y3lqZMKX0PWXcr2M28cvcs2kUOk+ykemEpeVuw24e1oUKY1qPfs3dIC8RbRwszU3dHlauYPFhk4W/2rV4Q/a90/yImJ4W/CCMCdVwOF5pWBTnj7iQeV39fqux3SWRRLqGFrgZAKWn8+5fOZsepehW60DETnvvwsQt25rR6xgYS2XHDMOg/T6YHZ9OSd5b/ImQ1cLmrt4VHKTKq+iUIYr1H2aqEjjDkojTsf102pq2DVjHyG4MzrxJ8ZMiCcNA1f0lTRLZKK5n1dh1hLCyvNyK5Dggm8NWLGiOId3qCB9V8Hg4tV8U9zB9tU/rawbqht7YGvwDJKBA4lFaQJxPuicL4NAUivfrhRJQuoGmnAnU1q1tBLVIPakrKYhRRr+vu3ZSbbuLxUKsZDWJhn1gOG2HHKiSpotJZxJL4L7yG7vkxzmTcJRxtHS3AUrftWbZUb36NuCmGfxCQ8ZQq5OU8TCTbLEodBbQTsy+KZmCt24x3RV+XQHivr/OvYujkJft1zaHqcscIBXBiUSCyHC19yjfm6CmkoPYhELpp74xENv3iZIjcMGVK9amsWdwSs3SDlc4DeRSZSRlT0ySjfwzEGYbcsuF3OlVxWPqjV9O82OZ2skY9D2KIOyvf/o4CozHkTglxf2Xq5knXIk3kutD5mXbQyi4/HgZmjWIGZ/JlHNfN0dRvSrRBRzQTNPv80UsDStOm/Ps5g9bMYsPgDPkm4nLESVtwTsEx+cofojyFeA+6K0SvWpdEiYwb9J5VUaeu+6eTj21VGcHurG1Gpw8+l5Fk60/TovokNZ1cz9O5SM009zePnhvqhw9iHsHONBQkhrqmkgrQun4UYVw42TzO2qt9OruQhx50chV1nMLp54g+5lnkLxZ8IXLoN1o1+7dDqSUCSw99aSgK4zyHd/aI/UUjBaY2FBrfMtrppYK2Ze6sFQjhDGK5qd0 SEDxTiFB 74KS89Xx2XBj9BPL9CIZWoXc/+E97VtR8VGOJ7QutvtgNCNvEM+ZvhSYfvs+GvnYqTf4MOsoEZzkTpSudCV2XaY58ENIkd71rw6a42C7BM+aya3SXzmixcj0Ok5vfOBd+ywk+aYuY/8h78bLJPKU/hxca3PqsT97HurQ4AG1plLd1z7ezDzT1W2kdCcthIMwmk7q54x9DJJceFvA4G6NesKdxmqDkVqbvlnnP 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 Thu, Mar 21, 2024 at 11:40:13PM +0100, Christoph Hellwig wrote: > 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. You are treating FOLL_PCI_P2PDMA as a hint, but in iov_iter_extract_user_pages() you set it only for p2p queues. I was under impression that you want only p2p pages in these queues. Anyway, I can prepare other patch that will return or p2p or non-p2p pages in one shot. Thanks