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[209.132.180.67]) by mx.google.com with ESMTP id k9si4683504pgo.509.2018.03.02.15.45.41; Fri, 02 Mar 2018 15:45:56 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=fail header.i=@infradead.org header.s=bombadil.20170209 header.b=OlOU35US; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1427942AbeCBPxh (ORCPT + 99 others); Fri, 2 Mar 2018 10:53:37 -0500 Received: from bombadil.infradead.org ([198.137.202.133]:38080 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1424068AbeCBPxd (ORCPT ); Fri, 2 Mar 2018 10:53:33 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=0Yi1WNxH2+CJnuDiR5ZolGXcqP8yPkaDZdvB1DeS9zE=; b=OlOU35UScDHc0s2IRAW1dtdfZ hZ5u4k3f7/QNB7J8ndcaIOn9pBWUCLSb4Yfommio2ITsSYeJWQHLV0er1mRwaEqN2/V3jZCGjQJ9g 03mGkYGvs1T+e+2hbQkFAh/54/myKzrdXYO1G/JsP1RLW4OUZGaWn67+B3KNa34bMZPtoPa4P6xLy 0hmtrSIw6KwkxG2XgFwcUcR7WrOIL/j46DqwrREdZB9KLYjS2i5F6gKxlO1o6DtgB7xp/96bdo1dj ORYXBrN9BoVNy7D9mae4w8AXkJVZMrxWlsLKWrCzY2wyskPkb5/RdpNfX36oDFetmAwHsXOYUCqUO glxDLx+Gw==; Received: from hch by bombadil.infradead.org with local (Exim 4.89 #1 (Red Hat Linux)) id 1ermzr-0001oZ-7T; Fri, 02 Mar 2018 15:53:23 +0000 Date: Fri, 2 Mar 2018 07:53:22 -0800 From: Christoph Hellwig To: Stephen Bates Cc: Keith Busch , Jens Axboe , Alex Williamson , "linux-nvdimm@lists.01.org" , "linux-rdma@vger.kernel.org" , "linux-pci@vger.kernel.org" , Steve Wise , "linux-kernel@vger.kernel.org" , "linux-nvme@lists.infradead.org" , "linux-block@vger.kernel.org" , Jason Gunthorpe , =?iso-8859-1?B?Suly9G1l?= Glisse , Benjamin Herrenschmidt , Bjorn Helgaas , Max Gurtovoy , Christoph Hellwig Subject: Re: [PATCH v2 10/10] nvmet: Optionally use PCI P2P memory Message-ID: <20180302155322.GA5934@infradead.org> References: <20180228234006.21093-11-logang@deltatee.com> <749e3752-4349-0bdf-5243-3d510c2b26db@grimberg.me> <40d69074-31a8-d06a-ade9-90de7712c553@deltatee.com> <5649098f-b775-815b-8b9a-f34628873ff4@grimberg.me> <20180301184249.GI19007@ziepe.ca> <20180301224540.GL19007@ziepe.ca> <77591162-4CCD-446E-A27C-1CDB4996ACB7@raithlin.com> <20180301234930.GG14799@localhost.localdomain> <6B6A0FD9-14F5-4AF2-A74A-DAA562C34AB9@raithlin.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <6B6A0FD9-14F5-4AF2-A74A-DAA562C34AB9@raithlin.com> User-Agent: Mutt/1.9.2 (2017-12-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Mar 01, 2018 at 11:53:16PM +0000, Stephen Bates wrote: > > There's a meaningful difference between writing to an NVMe CMB vs PMR > > When the PMR spec becomes public we can discuss how best to integrate it into the P2P framework (if at all) ;-). http://nvmexpress.org/wp-content/uploads/NVM-Express-1.3-Ratified-TPs.zip