From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (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 3shwn262QVzDrLr for ; Mon, 26 Sep 2016 04:37:09 +1000 (AEST) Received: from pps.filterd (m0098416.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.17/8.16.0.17) with SMTP id u8PIXJ62084677 for ; Sun, 25 Sep 2016 14:37:06 -0400 Received: from e31.co.us.ibm.com (e31.co.us.ibm.com [32.97.110.149]) by mx0b-001b2d01.pphosted.com with ESMTP id 25p6qs3vhn-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Sun, 25 Sep 2016 14:37:06 -0400 Received: from localhost by e31.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Sun, 25 Sep 2016 12:37:05 -0600 From: Reza Arbab To: Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , Rob Herring , Frank Rowand , Jonathan Corbet , Andrew Morton Cc: Bharata B Rao , Nathan Fontenot , Stewart Smith , Alistair Popple , Balbir Singh , "Aneesh Kumar K.V" , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, devicetree@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH v3 4/5] powerpc/mm: restore top-down allocation when using movable_node Date: Sun, 25 Sep 2016 13:36:55 -0500 In-Reply-To: <1474828616-16608-1-git-send-email-arbab@linux.vnet.ibm.com> References: <1474828616-16608-1-git-send-email-arbab@linux.vnet.ibm.com> Message-Id: <1474828616-16608-5-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: , At boot, the movable_node option sets bottom-up memblock allocation. This reduces the chance that, in the window before movable memory has been identified, an allocation for the kernel might come from a movable node. By going bottom-up, early allocations will most likely come from the same node as the kernel image, which is necessarily in a nonmovable node. Then, once any known hotplug memory has been marked, allocation can be reset back to top-down. On x86, this is done in numa_init(). This patch does the same on power, in numa initmem_init(). Signed-off-by: Reza Arbab --- arch/powerpc/mm/numa.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c index d7ac419..fdf1e69 100644 --- a/arch/powerpc/mm/numa.c +++ b/arch/powerpc/mm/numa.c @@ -945,6 +945,9 @@ void __init initmem_init(void) max_low_pfn = memblock_end_of_DRAM() >> PAGE_SHIFT; max_pfn = max_low_pfn; + /* bottom-up allocation may have been set by movable_node */ + memblock_set_bottom_up(false); + if (parse_numa_properties()) setup_nonnuma(); else -- 1.8.3.1