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=-0.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,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 7E111C3524A for ; Tue, 4 Feb 2020 06:02:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 49CB120674 for ; Tue, 4 Feb 2020 06:02:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="bPGJrEph" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726312AbgBDGCB (ORCPT ); Tue, 4 Feb 2020 01:02:01 -0500 Received: from us-smtp-delivery-1.mimecast.com ([207.211.31.120]:51645 "EHLO us-smtp-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725834AbgBDGCB (ORCPT ); Tue, 4 Feb 2020 01:02:01 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1580796119; 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: in-reply-to:in-reply-to:references:references; bh=RjdsRkXe77yTljkA9sXafvBdByUVdvxrTgCwvbrVV0w=; b=bPGJrEphWamsxL+uQ9P78Q3eSjfixaDLtAGa2bQ9B7DLfb6mW1CKUIBlzlDLITAeYLNBrQ vMJQV7SJbQPLn7Gj/TPTNOXLCjmKi4zw7emOXvdUpWLWCq/v0339/6/zH3by693GRCcGAF vMzq1PtmYMZUcPs38R/p+WhtZEL1RNc= Received: from mail-qv1-f70.google.com (mail-qv1-f70.google.com [209.85.219.70]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-119-V_9P6IBrOUKtCA50Q0S0KQ-1; Tue, 04 Feb 2020 01:01:58 -0500 X-MC-Unique: V_9P6IBrOUKtCA50Q0S0KQ-1 Received: by mail-qv1-f70.google.com with SMTP id z9so11029273qvo.10 for ; Mon, 03 Feb 2020 22:01:58 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=RjdsRkXe77yTljkA9sXafvBdByUVdvxrTgCwvbrVV0w=; b=bgsNrOLNSq2YpaF/WVdF6tjZXol3bfjnV5vbUlTqM9zmNJrsMP4pQ5afXs/cHlHSS9 aIVEYS/nsOLPyOVNxvDIN5b4NrxxjSh+Nu1lvNqg6GpKOdGdQ4HemNSlQcZVxOcsDe5X CnLDmlVVySMv3TqiPf+qc9gAtvh4Xgb7/wmGfM7Hxc0myo3lqVEOMcnYh80DWG01s6I1 i+7SxeuQZZsT7hkiUmFRYmC4484TOHxgyIuFIJdbbim5bTD06cbOW1aeEgM2kcB0vrlF CupfHYEcOTiOgID2bIQ71vMAfwdPUKXs8O/3RUhea48w+GcCFHWO77myU/oHwI7HzrIN Iltg== X-Gm-Message-State: APjAAAVDCxOUYofQ49mAri+XPGcx616/Q2HVMwUAqa9RirJV3fwWvu36 Dw5GyreTS8fVPjI83a8OVOG3YurqB2Mg8sVdvOxwp87UsFcQwMI7G4ArhLnEJXXBRSosnVBvz6d 5I03FMSeea/lR X-Received: by 2002:a05:620a:102c:: with SMTP id a12mr25836898qkk.95.1580796117493; Mon, 03 Feb 2020 22:01:57 -0800 (PST) X-Google-Smtp-Source: APXvYqwdvK3Ipy2qMCfUzq1ylzYT9IbitByfrekyORfLE2eptvuEIqJ12IuGLk9Wtkttgxshu+/I4A== X-Received: by 2002:a05:620a:102c:: with SMTP id a12mr25836873qkk.95.1580796117247; Mon, 03 Feb 2020 22:01:57 -0800 (PST) Received: from redhat.com (bzq-109-64-11-187.red.bezeqint.net. [109.64.11.187]) by smtp.gmail.com with ESMTPSA id u24sm10612793qkm.40.2020.02.03.22.01.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Feb 2020 22:01:56 -0800 (PST) Date: Tue, 4 Feb 2020 01:01:48 -0500 From: "Michael S. Tsirkin" To: Jason Wang Cc: Tiwei Bie , linux-kernel@vger.kernel.org, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, shahafs@mellanox.com, jgg@mellanox.com, rob.miller@broadcom.com, haotian.wang@sifive.com, eperezma@redhat.com, lulu@redhat.com, parav@mellanox.com, rdunlap@infradead.org, hch@infradead.org, jiri@mellanox.com, hanand@xilinx.com, mhabets@solarflare.com, maxime.coquelin@redhat.com, lingshan.zhu@intel.com, dan.daly@intel.com, cunming.liang@intel.com, zhihong.wang@intel.com Subject: Re: [PATCH] vhost: introduce vDPA based backend Message-ID: <20200204005306-mutt-send-email-mst@kernel.org> References: <20200131033651.103534-1-tiwei.bie@intel.com> <7aab2892-bb19-a06a-a6d3-9c28bc4c3400@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <7aab2892-bb19-a06a-a6d3-9c28bc4c3400@redhat.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Tue, Feb 04, 2020 at 11:30:11AM +0800, Jason Wang wrote: > 5) generate diffs of memory table and using IOMMU API to setup the dma > mapping in this method Frankly I think that's a bunch of work. Why not a MAP/UNMAP interface? -- MST