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 E5581C48BF6 for ; Mon, 4 Mar 2024 02:28:08 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 6536B94000D; Sun, 3 Mar 2024 21:28:07 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 5B4E8940007; Sun, 3 Mar 2024 21:28:07 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 42F6394000D; Sun, 3 Mar 2024 21:28:07 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id 2D4D4940007 for ; Sun, 3 Mar 2024 21:28:07 -0500 (EST) Received: from smtpin27.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay02.hostedemail.com (Postfix) with ESMTP id B173A1208D9 for ; Mon, 4 Mar 2024 02:28:06 +0000 (UTC) X-FDA: 81857771772.27.9A24747 Received: from out-173.mta1.migadu.com (out-173.mta1.migadu.com [95.215.58.173]) by imf24.hostedemail.com (Postfix) with ESMTP id BB7CF180002 for ; Mon, 4 Mar 2024 02:28:04 +0000 (UTC) Authentication-Results: imf24.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=GFbyjr7F; dmarc=pass (policy=none) header.from=linux.dev; spf=pass (imf24.hostedemail.com: domain of yanjun.zhu@linux.dev designates 95.215.58.173 as permitted sender) smtp.mailfrom=yanjun.zhu@linux.dev ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1709519285; 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:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=AwmaRBK9f4xeTr2KKIZaEkYuoxsnConkJ3QY8WkxaG4=; b=oTpuhDiqWERL3joF4HIOSZXtU2HHZoskFGt+kf1u9x75FMW/4XsOmM1nTkHtSoe0M1p6ah JEN0+QV5SXSW50h6MCaiBB+sNRe8SD8so98Nprb+NSdOfzP+d5OtV4wi/BL3Gp1dhJqFUz tqQD1DTT/C1YIckPFiRlGvAAXaJnty0= ARC-Authentication-Results: i=1; imf24.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=GFbyjr7F; dmarc=pass (policy=none) header.from=linux.dev; spf=pass (imf24.hostedemail.com: domain of yanjun.zhu@linux.dev designates 95.215.58.173 as permitted sender) smtp.mailfrom=yanjun.zhu@linux.dev ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1709519285; a=rsa-sha256; cv=none; b=J6CV2yoRmt2XLOUfOiDdWdpMkzs+aq02Zbs/54bA/xEwDJBdfiWVS/Py+yHzxtT0ghSAtm R7zwRgLZ0REpob8nlz5uhVGZOrTG+k2sFf54UUB2iMHkAB50bTNmaekfDQiXm6APr/25Oc SLdFkhnq0QrIRDtC9RukkiEJCpK17Ro= Message-ID: <22df55f8-cf64-4aa8-8c0b-b556c867b926@linux.dev> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1709519282; h=from:from: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:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=AwmaRBK9f4xeTr2KKIZaEkYuoxsnConkJ3QY8WkxaG4=; b=GFbyjr7FhhwloIRGYJbvYR2kjPjcVdcWEeIEFJysy6dwcV7/jHlDBt/GAmHusvPsiaRlNZ UB7rrqP99IQeHRy17j5j5Kx45ucggNjfStR4c5A4+uGW1Gcy07R2jku2TzogQkWFWGB+PJ j/QAT+SkCeRTAFVbxsPeNebm/D8kfjk= Date: Mon, 4 Mar 2024 03:27:52 +0100 MIME-Version: 1.0 Subject: Re: [LSF/MM/BPF TOPIC] [LSF/MM/BPF ATTEND] : Two stage IOMMU DMA mapping operations To: Zhu Yanjun , Leon Romanovsky , Chaitanya Kulkarni Cc: "lsf-pc@lists.linux-foundation.org" , "linux-block@vger.kernel.org" , "linux-nvme@lists.infradead.org" , "iommu@lists.linux.dev" , linux-rdma , "linux-mm@kvack.org" , Jens Axboe , Bart Van Assche , "kbusch@kernel.org" , Damien Le Moal , Amir Goldstein , "josef@toxicpanda.com" , "Martin K. Petersen" , "daniel@iogearbox.net" , Christoph Hellwig , Dan Williams , "jack@suse.com" , Jason Gunthorpe , Chuck Lever References: <97f385db-42c9-4c04-8fba-9b1ba8ffc525@nvidia.com> <20240227113007.GD1842804@unreal> X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Zhu Yanjun In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: BB7CF180002 X-Stat-Signature: ce6kcazzcybfzfi4migesyf5jna41tp3 X-Rspam-User: X-HE-Tag: 1709519284-234830 X-HE-Meta: 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 KWUUaEnE XjFazvf1aX6tU2NQorcEZMQV1io3ebVLm5BvfO5Js6kGtyo/3t53JO1Nmmgdax83vCM4sc1tPvrey6SGFBIPUjxgaZVHy/ytCG+hp6mKILtxpgMbJm4xf1JNP6QdyDkXR6VB+QE83LErakSqI1bmkXfCpuHl/bAX4bRN+KSU4z7S4J26XnfRyHZ2ZnNRXA4pFEKQXwTZguJ500//6MKHO2DsA6vhwHiMr4uNWokm95pNEkEqg7yZ6T0uFTmg+ohmTqjx50w+PnkwG4c7G6Y0Yj2uSBA== 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: 在 2024/3/3 17:43, Zhu Yanjun 写道: > On 27.02.24 12:30, Leon Romanovsky wrote: >> On Tue, Feb 27, 2024 at 08:17:27AM +0000, Chaitanya Kulkarni wrote: >>> Hi, >> >> <...> >> >>> In order to create a good platform for a concrete and meaningful >>> discussion at LSFMM 24, we plan to post an RFC within the next two >>> weeks. >> >> The code can be found here >> https://git.kernel.org/pub/scm/linux/kernel/git/leon/linux-rdma.git/log/?h=dma-split > > Thanks a lot. I will delve into it. An interesting topic. The commits should be the followings. I am interested in them. 5d8f8f35859c (HEAD -> dma-split, origin/dma-split) cover-letter: Split IOMMU DMA mapping operation to two steps 3beffcde0c12 vfio/mlx5: Convert vfio to use DMA link API acdfef1ccbcb vfio/mlx5: Explicitly store page list f16314362e66 vfio/mlx5: Rewrite create mkey flow to allow better code reuse 763e753cd6ed vfio/mlx5: Explicitly use number of pages instead of allocated length 7f58ebf0cfc4 RDMA/umem: Prevent UMEM ODP creation with SWIOTLB f1c687fde096 RDMA/core: Separate DMA mapping to caching IOVA and page linkage ffc81619c60d RDMA/umem: Store ODP access mask information in PFN 67038d9e24fd RDMA/umem: Preallocate and cache IOVA for UMEM ODP ce141bccd409 iommu/dma: Implement link/unlink page callbacks 1dd12d4a44d1 iommu/dma: Prepare map/unmap page functions to receive IOVA b9714667f54f iommu/dma: Provide an interface to allow preallocate IOVA 21dbfc7fc2f1 dma-mapping: provide callbacks to link/unlink pages to specific IOVA 52689a26b87a dma-mapping: provide an interface to allocate IOVA 34f8a8baecaa mm/hmm: let users to tag specific PFNs Zhu Yanjun > > Zhu Yanjun > >> >> Thanks >> >>> >>> Required Attendees list :- >>> >>> Christoph Hellwig >>> Jason Gunthorpe >>> Jens Axboe >>> Chuck Lever >>> David Howells >>> Keith Busch >>> Bart Van Assche >>> Damien Le Moal >>> Martin Petersen >>> >>> -ck >>> >>> [1] >>> https://lore.kernel.org/all/169772852492.5232.17148564580779995849.stgit@klimt.1015granger.net >>> [2] https://lore.kernel.org/linux-iommu/20200708065014.GA5694@lst.de/ >>> >>> >>> >