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 323E8E68960 for ; Thu, 31 Oct 2024 09:21:22 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id C20A26B0095; Thu, 31 Oct 2024 05:21:21 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id BD02F6B0096; Thu, 31 Oct 2024 05:21:21 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id ABF5C6B0098; Thu, 31 Oct 2024 05:21:21 -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 8C41C6B0095 for ; Thu, 31 Oct 2024 05:21:21 -0400 (EDT) Received: from smtpin12.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id 193FE1C6E74 for ; 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d=hostedemail.com; t=1730366398; a=rsa-sha256; cv=none; b=Zk7Rj9Xmi1WpP8cLzQjHVgeOXI92P2LnEGnIdZKuhl/NfBJNfOBr5ICB+pIcYzVZ4NozxH 6OTGg2sapgkSa2beJnNNh+CVPSynpKU4dMOifKCeUB5EQ5Ff9y41kYrfBWNl/3SrXP9iYM n3gpIsMU0H+zbgT+SODITbo1xT68U4k= ARC-Authentication-Results: i=1; imf27.hostedemail.com; dkim=none; spf=pass (imf27.hostedemail.com: domain of hch@lst.de designates 213.95.11.211 as permitted sender) smtp.mailfrom=hch@lst.de; dmarc=none Received: by verein.lst.de (Postfix, from userid 2407) id 0872F68B05; Thu, 31 Oct 2024 10:21:14 +0100 (CET) Date: Thu, 31 Oct 2024 10:21:13 +0100 From: Christoph Hellwig To: Leon Romanovsky Cc: Christoph Hellwig , Jens Axboe , Jason Gunthorpe , Robin Murphy , Joerg Roedel , Will Deacon , Sagi Grimberg , Keith Busch , Bjorn Helgaas , Logan Gunthorpe , Yishai Hadas , Shameer Kolothum , Kevin Tian , Alex Williamson , Marek Szyprowski , =?iso-8859-1?B?Suly9G1l?= Glisse , Andrew Morton , Jonathan Corbet , 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, linux-pci@vger.kernel.org, kvm@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH v1 00/17] Provide a new two step DMA mapping API Message-ID: <20241031092113.GA1791@lst.de> References: <3144b6e7-5c80-46d2-8ddc-a71af3c23072@kernel.dk> <20241031083450.GA30625@lst.de> <20241031090530.GC7473@unreal> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20241031090530.GC7473@unreal> User-Agent: Mutt/1.5.17 (2007-11-01) X-Rspamd-Server: rspam10 X-Stat-Signature: nny4qb46648kcom3j74mbewd58ndqdcs X-Rspamd-Queue-Id: 0C88D40003 X-Rspam-User: X-HE-Tag: 1730366451-751470 X-HE-Meta: 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 kGjUoCm5 jWnfT4Ic+P0Bp3x+BtrUKNYH2vgPsZXJDHVInWUPcmmE523JLhHlNuxS6RRN/TIsJwlgpI4LxOLGqzMs= 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, Oct 31, 2024 at 11:05:30AM +0200, Leon Romanovsky wrote: > This series is a subset of the series you tested and doesn't include the > block layer changes which most likely were the cause of the performance > regression. > > This is why I separated the block layer changes from the rest of the series > and marked them as RFC. > > The current patch set is viable for HMM and VFIO. Can you please retest > only this series and leave the block layer changes for later till Christoph > finds the answer for the performance regression? As the subset doesn't touch block code or code called by block I don't think we need Jens to benchmark it, unless he really wants to.