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=-6.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 11FEBC433E6 for ; Tue, 26 Jan 2021 05:38:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D6BDB229C4 for ; Tue, 26 Jan 2021 05:38:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388028AbhAZFiS (ORCPT ); Tue, 26 Jan 2021 00:38:18 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42208 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727104AbhAYSgq (ORCPT ); Mon, 25 Jan 2021 13:36:46 -0500 Received: from mail-lf1-x130.google.com (mail-lf1-x130.google.com [IPv6:2a00:1450:4864:20::130]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A4FE9C061788 for ; Mon, 25 Jan 2021 10:36:05 -0800 (PST) Received: by mail-lf1-x130.google.com with SMTP id p21so14173704lfu.11 for ; Mon, 25 Jan 2021 10:36:05 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=DhOpRey6EloisNye+3HkTEg5Pu9aaQtatcMwi71hgBg=; b=bhdl8FUY5LnhItcgA29ptNUDktEncN/DwH2cRJo4kr0/L5Pc/+Ljf0VGeFZE+2cNEa 7muHJ4aet8KypPGo+ubJtG1N9e92A4snQ3R3hSDTM6Aea/+u7z4jvcs1nBDasMFsN0Oj U7DXBXbaXnLIfKgQT/zHg3PUyV5srlj6X3yzE= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=DhOpRey6EloisNye+3HkTEg5Pu9aaQtatcMwi71hgBg=; b=WnriKxydSvLhu5k50q4iW4yczOlzx+0oKz0ZMQfKCyQiMGzNJoPELCfloFoxl2PXs/ D8k9rx/LfAfUPMYu2y7Dmj9aeqSOtRTY67d2WXtLi6KTz0BXj2pV08LBE+RT8ucz2V3D AtThYutnobHOBz05wGokadZAz9KeKXistyZsZH4Fss2qmdj4jWSTXOAdYMKjKeG0qbN6 Qp+g8ElrcBxXmgMhkBZSjOftABKNgEx+Zg8k2MZUzOM8qJxe9IA/dOq+CLEXDfivdk1g yoZWc/5oPG58qQHEcaEjuw9YM2reqs7lJ/Wj7HJJ7FiCh3g6+5Cb+ZGd/sQ4pOi3w3Xk gpPg== X-Gm-Message-State: AOAM532bryFM23GnZKrRV5B6OEoUu2drmx5gWBI3QjwJMIxJ8NJSECJD H4XU7Lj/OCldB6aQVS04B25F2whwy0VvYdttxw44IQ== X-Google-Smtp-Source: ABdhPJwtqoy676aQQ8tI5803zVLVtj/7TEkuVMOIRu/Ie82JWpQZjeTvm9JLyBSH/T4fiPWm+JcUU2J/rljj8Prhp08= X-Received: by 2002:a19:5e1d:: with SMTP id s29mr887106lfb.440.1611599764047; Mon, 25 Jan 2021 10:36:04 -0800 (PST) MIME-Version: 1.0 References: <20210122193658.282884-1-saeed@kernel.org> In-Reply-To: From: Edwin Peer Date: Mon, 25 Jan 2021 10:35:27 -0800 Message-ID: Subject: Re: [pull request][net-next V10 00/14] Add mlx5 subfunction support To: Parav Pandit Cc: Saeed Mahameed , "David S. Miller" , Jakub Kicinski , Jason Gunthorpe , netdev , "linux-rdma@vger.kernel.org" , Alexander Duyck , Sridhar Samudrala , David Ahern , Kiran Patil , Jacob Keller , "Ertman, David M" , Dan Williams , Saeed Mahameed Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="0000000000007956e605b9bdcf96" Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org --0000000000007956e605b9bdcf96 Content-Type: text/plain; charset="UTF-8" On Mon, Jan 25, 2021 at 2:57 AM Parav Pandit wrote: > > Apologies for the tardy question out of left field, but I've been > > thinking about this some more. If I recall, the primary motivation for > > this was a means to effectively address more VFs? But, why can't the > > device simply expose more bus numbers? > > Several weeks back, Jason already answered this VF scaling question from you at discussion [1]. > > [1] https://lore.kernel.org/netdev/20201216023928.GG552508@nvidia.com/ True, although I didn't really consider the full cost argument at the time because the core answer was "They can't", however, the fact is, PCI can. 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