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=-3.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 92AB8C433EF for ; Wed, 22 Sep 2021 13:09:08 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 3C30060F6D for ; Wed, 22 Sep 2021 13:09:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 3C30060F6D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:40188 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mT1zn-0004BI-4R for qemu-devel@archiver.kernel.org; Wed, 22 Sep 2021 09:09:07 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:48258) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mT1x6-0001km-Qc for qemu-devel@nongnu.org; Wed, 22 Sep 2021 09:06:22 -0400 Received: from mail.kernel.org ([198.145.29.99]:52950) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mT1x3-00083L-RW for qemu-devel@nongnu.org; Wed, 22 Sep 2021 09:06:19 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 9F7D1611CA; Wed, 22 Sep 2021 13:06:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1632315973; bh=oNdKNGeEDSMsQZb0QR79jAvNFQsEnJOIQSDq8mmnnzs=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=ZmZut9FaGDBMBk0SNp1LqarjL1dNIa9LJeP0D32JOFaldMmVLyxNsVJ5ye+/213Vb Y046E+hu85twyYidfc5wmzc5AmSKuc+XzHEgENvVUzw8bRu5CSGd5JJ2siUC9sjmmK cX83OJtY+o4t2AZ9D3hXac09JxL7f/a4uYR9TLVg0j7ZYKpSPvFrQlq30WzyPHa6OT 5AIha5qJjIg+YSHBe58gEGciD3IPjh9f1quU8Ay3WYTdk+GbuatGI+3QG6cPJuNp/0 fru4jCWvG50H6w/4YLaxXYgzhZL82FCR5vR0sbMrjZzxgDsHUFugPDQDkbA25HUO1j O7AhSCzM57NFg== Date: Wed, 22 Sep 2021 16:06:09 +0300 From: Leon Romanovsky To: Junji Wei Subject: Re: [RFC 0/5] VirtIO RDMA Message-ID: References: <20210902130625.25277-1-weijunji@bytedance.com> <20210915134301.GA211485@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Received-SPF: pass client-ip=198.145.29.99; envelope-from=leon@kernel.org; helo=mail.kernel.org X-Spam_score_int: -85 X-Spam_score: -8.6 X-Spam_bar: -------- X-Spam_report: (-8.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.472, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-devel , Jason Gunthorpe , mst , RDMA mailing list , Jason Wang , Cornelia Huck , yuval.shaia.ml@gmail.com, virtualization , Yongji Xie , Doug Ledford , =?utf-8?B?5p+056iz?= , Hannes Reinecke Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Wed, Sep 22, 2021 at 08:08:44PM +0800, Junji Wei wrote: > > On Sep 15, 2021, at 9:43 PM, Jason Gunthorpe wrote: <...> > >> 4. The FRMR api need to set key of MR through IB_WR_REG_MR. > >> But it is impossible to change a key of mr using uverbs. > > > > FRMR is more like memory windows in user space, you can't support it > > using just regular MRs. > > It is hard to support this using uverbs, but it is easy to support > with uRDMA that we can get full control of mrs. What is uRDMA? Thanks