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=-2.3 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,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 B6DB4C432C0 for ; Thu, 21 Nov 2019 08:17:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8883C20855 for ; Thu, 21 Nov 2019 08:17:45 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="iejSZnoR" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726358AbfKUIRo (ORCPT ); Thu, 21 Nov 2019 03:17:44 -0500 Received: from us-smtp-2.mimecast.com ([205.139.110.61]:23776 "EHLO us-smtp-delivery-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726014AbfKUIRo (ORCPT ); Thu, 21 Nov 2019 03:17:44 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1574324262; 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: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=fME2CUbGpuzKSf98sUwbJKLhY6cHiaVbZgMmbu81k4g=; b=iejSZnoR/wJ5u7Dp4KI48TohZPv5u2kBNaIBC8X9AGePysCFfCw0k7+qc7xf0S7VT9qqEJ xXUynw1d7rT5Ot0b3OHWoqvehqJJclTvKM49vrjkUy0Li+6oDkedLU6d2baM4z2knhHnmF 1CEEAMEmlcNvdLb/ykGS96CaNOfMAmY= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-340-KpmBr6-hM_mP_HKXoTqyNQ-1; Thu, 21 Nov 2019 03:17:39 -0500 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 184C31800D45; Thu, 21 Nov 2019 08:17:38 +0000 (UTC) Received: from [10.72.12.204] (ovpn-12-204.pek2.redhat.com [10.72.12.204]) by smtp.corp.redhat.com (Postfix) with ESMTP id 08A465DAB0; Thu, 21 Nov 2019 08:17:27 +0000 (UTC) Subject: Re: [net-next v2 1/1] virtual-bus: Implementation of Virtual Bus To: Parav Pandit , Alex Williamson , Jason Gunthorpe Cc: "Michael S. Tsirkin" , Jeff Kirsher , "davem@davemloft.net" , "gregkh@linuxfoundation.org" , Dave Ertman , "netdev@vger.kernel.org" , "linux-rdma@vger.kernel.org" , "nhorman@redhat.com" , "sassmann@redhat.com" , Kiran Patil , Tiwei Bie References: <20191119164632.GA4991@ziepe.ca> <20191119134822-mutt-send-email-mst@kernel.org> <20191119191547.GL4991@ziepe.ca> <20191119163147-mutt-send-email-mst@kernel.org> <20191119231023.GN4991@ziepe.ca> <20191119191053-mutt-send-email-mst@kernel.org> <20191120014653.GR4991@ziepe.ca> <134058913.35624136.1574222360435.JavaMail.zimbra@redhat.com> <20191120133835.GC22515@ziepe.ca> <20191120102856.7e01e2e2@x1.home> <20191120181108.GJ22515@ziepe.ca> <20191120150732.2fffa141@x1.home> From: Jason Wang Message-ID: Date: Thu, 21 Nov 2019 16:17:26 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-MC-Unique: KpmBr6-hM_mP_HKXoTqyNQ-1 X-Mimecast-Spam-Score: 0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org On 2019/11/21 =E4=B8=8A=E5=8D=886:39, Parav Pandit wrote: >> From: Alex Williamson >> Sent: Wednesday, November 20, 2019 4:08 PM >> >> On Wed, 20 Nov 2019 14:11:08 -0400 >> Jason Gunthorpe wrote: >> >>> I feel like mdev is suffering from mission creep. I see people >>> proposing to use mdev for many wild things, the Mellanox SF stuff in >>> the other thread and this 'virtio subsystem' being the two that have >>> come up publicly this month. >> Tell me about it...;) >> > Initial Mellanox sub function proposal was done using dedicated non-mdev = subdev bus in [1] because mdev looked very vfio-ish. > > Along the way mdev proposal was suggested at [2] by mdev maintainers to u= se. > The bus existed that detached two drivers (mdev and vfio_mdev), there was= some motivation to attach other drivers. > > After that we continued discussion and mdev extension using alias to have= persistent naming in [3]. > > So far so good, but when we want to have actual use of mdev driver, it do= esn't look right.:-) > Want to implement devlink for mdev then? I think it may help in the case. Thanks