From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f70.google.com (mail-wm0-f70.google.com [74.125.82.70]) by kanga.kvack.org (Postfix) with ESMTP id 1C9E76B0261 for ; Thu, 6 Oct 2016 14:36:49 -0400 (EDT) Received: by mail-wm0-f70.google.com with SMTP id 123so4257166wmb.7 for ; Thu, 06 Oct 2016 11:36:49 -0700 (PDT) Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com. [148.163.158.5]) by mx.google.com with ESMTPS id p81si39160407wmf.29.2016.10.06.11.36.46 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 06 Oct 2016 11:36:46 -0700 (PDT) Received: from pps.filterd (m0098420.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.17/8.16.0.17) with SMTP id u96IXV3c062994 for ; Thu, 6 Oct 2016 14:36:45 -0400 Received: from e34.co.us.ibm.com (e34.co.us.ibm.com [32.97.110.152]) by mx0b-001b2d01.pphosted.com with ESMTP id 25wu5gtsdp-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Thu, 06 Oct 2016 14:36:44 -0400 Received: from localhost by e34.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 6 Oct 2016 12:36:43 -0600 From: Reza Arbab Subject: [PATCH v4 0/5] powerpc/mm: movable hotplug memory nodes Date: Thu, 6 Oct 2016 13:36:30 -0500 Message-Id: <1475778995-1420-1-git-send-email-arbab@linux.vnet.ibm.com> Sender: owner-linux-mm@kvack.org List-ID: To: Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , Rob Herring , Frank Rowand , Andrew Morton Cc: Bharata B Rao , Nathan Fontenot , Stewart Smith , Alistair Popple , Balbir Singh , "Aneesh Kumar K.V" , Tang Chen , linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, devicetree@vger.kernel.org, linux-mm@kvack.org These changes enable the dynamic creation of movable nodes on power. On x86, the ACPI SRAT memory affinity structure can mark memory hotpluggable, allowing the kernel to possibly create movable nodes at boot. While power has no analog of this SRAT information, we can still create a movable memory node, post boot, by hotplugging all of the node's memory into ZONE_MOVABLE. We provide a way to describe the extents and numa associativity of such a node in the device tree, while deferring the memory addition to take place through hotplug. In v1, this patchset introduced a new dt compatible id to explicitly create a memoryless node at boot. Here, things have been simplified to be applicable regardless of the status of node hotplug on power. We still intend to enable hotadding a pgdat, but that's now untangled as a separate topic. v4: * Rename of_fdt_is_available() to of_fdt_device_is_available(). Rename of_flat_dt_is_available() to of_flat_dt_device_is_available(). * Instead of restoring top-down allocation, ensure it never goes bottom-up in the first place, by making movable_node arch-specific. * Use MEMORY_HOTPLUG instead of PPC64 in the mm/Kconfig patch. v3: * http://lkml.kernel.org/r/1474828616-16608-1-git-send-email-arbab@linux.vnet.ibm.com * Use Rob Herring's suggestions to improve the node availability check. * More verbose commit log in the patch enabling CONFIG_MOVABLE_NODE. * Add a patch to restore top-down allocation the way x86 does. v2: * http://lkml.kernel.org/r/1473883618-14998-1-git-send-email-arbab@linux.vnet.ibm.com * Use the "status" property of standard dt memory nodes instead of introducing a new "ibm,hotplug-aperture" compatible id. * Remove the patch which explicitly creates a memoryless node. This set no longer has any bearing on whether the pgdat is created at boot or at the time of memory addition. v1: * http://lkml.kernel.org/r/1470680843-28702-1-git-send-email-arbab@linux.vnet.ibm.com Reza Arbab (5): drivers/of: introduce of_fdt_device_is_available() drivers/of: do not add memory for unavailable nodes powerpc/mm: allow memory hotplug into a memoryless node mm: make processing of movable_node arch-specific mm: enable CONFIG_MOVABLE_NODE on non-x86 arches arch/powerpc/mm/numa.c | 13 +------------ arch/x86/mm/numa.c | 35 ++++++++++++++++++++++++++++++++++- drivers/of/fdt.c | 29 ++++++++++++++++++++++++++--- include/linux/of_fdt.h | 2 ++ mm/Kconfig | 2 +- mm/memory_hotplug.c | 31 ------------------------------- 6 files changed, 64 insertions(+), 48 deletions(-) -- 1.8.3.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org