From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3s7Qr65YDTzDqd7 for ; Tue, 9 Aug 2016 04:27:34 +1000 (AEST) Received: from pps.filterd (m0098409.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.11/8.16.0.11) with SMTP id u78H5ZLE044323 for ; Mon, 8 Aug 2016 14:27:31 -0400 Received: from e33.co.us.ibm.com (e33.co.us.ibm.com [32.97.110.151]) by mx0a-001b2d01.pphosted.com with ESMTP id 24nb6xn6am-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Mon, 08 Aug 2016 14:27:31 -0400 Received: from localhost by e33.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 8 Aug 2016 12:27:30 -0600 From: Reza Arbab To: Rob Herring , Mark Rutland , Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Jonathan Corbet , Bharata B Rao , Nathan Fontenot , devicetree@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH 0/4] powerpc/mm: movable hotplug memory nodes Date: Mon, 8 Aug 2016 13:27:19 -0500 Message-Id: <1470680843-28702-1-git-send-email-arbab@linux.vnet.ibm.com> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , These changes enable onlining memory into ZONE_MOVABLE on power, and the creation of discrete nodes of movable memory. Node hotplug is not supported on power [1]. The approach taken instead is to create a memoryless placeholder node for the designated address range at boot. Hotplug and onlining of the memory are then done in the usual way. The numa code on power currently prevents hotplugging to a memoryless node. This limitation has been questioned before [2], and judging by the response, there doesn't seem to be a reason we can't remove it. No issues have been found in light testing. [1] commit 3af229f ("powerpc/numa: Reset node_possible_map to only node_online_map") [2] http://lkml.kernel.org/r/CAGZKiBrmkSa1yyhbf5hwGxubcjsE5SmkSMY4tpANERMe2UG4bg@mail.gmail.com http://lkml.kernel.org/r/20160511215051.GF22115@arbab-laptop.austin.ibm.com Reza Arbab (4): dt-bindings: add doc for ibm,hotplug-aperture powerpc/mm: create numa nodes for hotplug memory powerpc/mm: allow memory hotplug into a memoryless node mm: enable CONFIG_MOVABLE_NODE on powerpc .../bindings/powerpc/opal/hotplug-aperture.txt | 26 ++++++++++++++++++++++ Documentation/kernel-parameters.txt | 2 +- arch/powerpc/mm/numa.c | 23 ++++++++----------- mm/Kconfig | 2 +- 4 files changed, 37 insertions(+), 16 deletions(-) create mode 100644 Documentation/devicetree/bindings/powerpc/opal/hotplug-aperture.txt -- 1.8.3.1