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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham 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 66109C04EB9 for ; Wed, 5 Dec 2018 23:23:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2046220879 for ; Wed, 5 Dec 2018 23:23:55 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2046220879 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=deltatee.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728755AbeLEXXx (ORCPT ); Wed, 5 Dec 2018 18:23:53 -0500 Received: from ale.deltatee.com ([207.54.116.67]:37136 "EHLO ale.deltatee.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727794AbeLEXXx (ORCPT ); Wed, 5 Dec 2018 18:23:53 -0500 Received: from guinness.priv.deltatee.com ([172.16.1.162]) by ale.deltatee.com with esmtp (Exim 4.89) (envelope-from ) id 1gUgW7-0004MO-53; Wed, 05 Dec 2018 16:23:43 -0700 To: Jerome Glisse Cc: Dan Williams , Andi Kleen , Linux MM , Andrew Morton , Linux Kernel Mailing List , "Rafael J. Wysocki" , Dave Hansen , Haggai Eran , balbirs@au1.ibm.com, "Aneesh Kumar K.V" , Benjamin Herrenschmidt , "Kuehling, Felix" , Philip.Yang@amd.com, "Koenig, Christian" , "Blinzer, Paul" , John Hubbard , rcampbell@nvidia.com References: <20181205023116.GD3045@redhat.com> <20181205180756.GI3536@redhat.com> <20181205183314.GJ3536@redhat.com> <0ddb2620-ecbd-4b7b-aeb7-3f4ae7746e83@deltatee.com> <20181205185550.GK3536@redhat.com> <7ab26ea6-d16d-8d71-78ca-4266a864f8d3@deltatee.com> <20181205225828.GL3536@redhat.com> <20181205232028.GO3536@redhat.com> From: Logan Gunthorpe Message-ID: Date: Wed, 5 Dec 2018 16:23:42 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.3.0 MIME-Version: 1.0 In-Reply-To: <20181205232028.GO3536@redhat.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-CA Content-Transfer-Encoding: 7bit X-SA-Exim-Connect-IP: 172.16.1.162 X-SA-Exim-Rcpt-To: rcampbell@nvidia.com, jhubbard@nvidia.com, Paul.Blinzer@amd.com, christian.koenig@amd.com, Philip.Yang@amd.com, felix.kuehling@amd.com, benh@kernel.crashing.org, aneesh.kumar@linux.ibm.com, balbirs@au1.ibm.com, haggaie@mellanox.com, dave.hansen@intel.com, rafael@kernel.org, linux-kernel@vger.kernel.org, akpm@linux-foundation.org, linux-mm@kvack.org, ak@linux.intel.com, dan.j.williams@intel.com, jglisse@redhat.com X-SA-Exim-Mail-From: logang@deltatee.com Subject: Re: [RFC PATCH 02/14] mm/hms: heterogenenous memory system (HMS) documentation X-SA-Exim-Version: 4.2.1 (built Tue, 02 Aug 2016 21:08:31 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.com) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2018-12-05 4:20 p.m., Jerome Glisse wrote: > And my proposal is under /sys/bus and have symlink to all existing > device it agregate in there. That's so not the point. Use the existing buses don't invent some virtual tree. I don't know how many times I have to say this or in how many ways. I'm not responding anymore. > So you agree with my proposal ? A sysfs directory in which all the > bus and how they are connected to each other and what is connected > to each of them (device, CPU, memory). I'm fine with the motivation. What I'm arguing against is the implementation and the fact you have to create a whole grand new userspace API and hierarchy to accomplish it. Logan