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 X-Spam-Level: X-Spam-Status: No, score=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BD2E7C43460 for ; Fri, 14 May 2021 14:00:19 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 7DC1961465 for ; Fri, 14 May 2021 14:00:19 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7DC1961465 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id D44C36B0036; Fri, 14 May 2021 10:00:18 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id CF3816B006E; Fri, 14 May 2021 10:00:18 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B46DA6B0070; Fri, 14 May 2021 10:00:18 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0008.hostedemail.com [216.40.44.8]) by kanga.kvack.org (Postfix) with ESMTP id 8564D6B0036 for ; Fri, 14 May 2021 10:00:18 -0400 (EDT) Received: from smtpin35.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 20A1BBBFE for ; Fri, 14 May 2021 14:00:18 +0000 (UTC) X-FDA: 78139996116.35.7604961 Received: from verein.lst.de (verein.lst.de [213.95.11.211]) by imf14.hostedemail.com (Postfix) with ESMTP id 13020C005A2E for ; Fri, 14 May 2021 14:00:16 +0000 (UTC) Received: by verein.lst.de (Postfix, from userid 2407) id 062446736F; Fri, 14 May 2021 16:00:08 +0200 (CEST) Date: Fri, 14 May 2021 16:00:07 +0200 From: Christoph Hellwig To: Logan Gunthorpe Cc: linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, linux-block@vger.kernel.org, linux-pci@vger.kernel.org, linux-mm@kvack.org, iommu@lists.linux-foundation.org, Stephen Bates , Christoph Hellwig , Dan Williams , Jason Gunthorpe , Christian =?iso-8859-1?Q?K=F6nig?= , John Hubbard , Don Dutile , Matthew Wilcox , Daniel Vetter , Jakowski Andrzej , Minturn Dave B , Jason Ekstrand , Dave Hansen , Xiong Jianxin , Bjorn Helgaas , Ira Weiny , Robin Murphy Subject: Re: [PATCH v2 00/22] Add new DMA mapping operation for P2PDMA Message-ID: <20210514140007.GE4715@lst.de> References: <20210513223203.5542-1-logang@deltatee.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210513223203.5542-1-logang@deltatee.com> User-Agent: Mutt/1.5.17 (2007-11-01) X-Rspamd-Queue-Id: 13020C005A2E Authentication-Results: imf14.hostedemail.com; dkim=none; spf=none (imf14.hostedemail.com: domain of hch@lst.de has no SPF policy when checking 213.95.11.211) smtp.mailfrom=hch@lst.de; dmarc=none X-Rspamd-Server: rspam03 X-Stat-Signature: ray4ok5bm5jbk7as6nww1unsmo7tbb3u X-HE-Tag: 1621000816-377522 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: On Thu, May 13, 2021 at 04:31:41PM -0600, Logan Gunthorpe wrote: > 17 files changed, 570 insertions(+), 290 deletions(-) I'm a little worried about all this extra code for no new functionality at all.