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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=unavailable 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 CA83BC10DCE for ; Wed, 18 Mar 2020 07:35:46 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 8348620768 for ; Wed, 18 Mar 2020 07:35:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8348620768 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.vnet.ibm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 48j1zc6FMwzDqwT for ; Wed, 18 Mar 2020 18:35:40 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=none (no SPF record) smtp.mailfrom=linux.vnet.ibm.com (client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=srikar@linux.vnet.ibm.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.vnet.ibm.com 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 48j1qb2dCGzDqmJ for ; Wed, 18 Mar 2020 18:28:43 +1100 (AEDT) Received: from pps.filterd (m0187473.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 02I72ZbV172033 for ; Wed, 18 Mar 2020 03:28:41 -0400 Received: from e06smtp04.uk.ibm.com (e06smtp04.uk.ibm.com [195.75.94.100]) by mx0a-001b2d01.pphosted.com with ESMTP id 2yu8acvayv-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 18 Mar 2020 03:28:40 -0400 Received: from localhost by e06smtp04.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 18 Mar 2020 07:28:38 -0000 Received: from b06cxnps4074.portsmouth.uk.ibm.com (9.149.109.196) by e06smtp04.uk.ibm.com (192.168.101.134) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Wed, 18 Mar 2020 07:28:33 -0000 Received: from d06av24.portsmouth.uk.ibm.com (d06av24.portsmouth.uk.ibm.com [9.149.105.60]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 02I7SW6b40435910 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 18 Mar 2020 07:28:32 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1C91D42047; Wed, 18 Mar 2020 07:28:32 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 183B942042; Wed, 18 Mar 2020 07:28:28 +0000 (GMT) Received: from srikart450.in.ibm.com (unknown [9.85.106.17]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 18 Mar 2020 07:28:27 +0000 (GMT) From: Srikar Dronamraju To: Andrew Morton Subject: [PATCH v2 3/4] mm: Implement reset_numa_mem Date: Wed, 18 Mar 2020 12:58:09 +0530 X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200318072810.9735-1-srikar@linux.vnet.ibm.com> References: <20200318072810.9735-1-srikar@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 20031807-0016-0000-0000-000002F30876 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20031807-0017-0000-0000-000033568C4E Message-Id: <20200318072810.9735-4-srikar@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138, 18.0.645 definitions=2020-03-18_02:2020-03-17, 2020-03-18 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 lowpriorityscore=0 mlxscore=0 clxscore=1015 priorityscore=1501 spamscore=0 malwarescore=0 impostorscore=0 suspectscore=0 bulkscore=0 mlxlogscore=999 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2003180032 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sachin Sant , Nathan Lynch , Srikar Dronamraju , Michal Hocko , linux-mm@kvack.org, Kirill Tkhai , Mel Gorman , Christopher Lameter , Bharata B Rao , linuxppc-dev@lists.ozlabs.org, Joonsoo Kim , Vlastimil Babka Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" For a memoryless or offline nodes, node_numa_mem refers to a N_MEMORY fallback node. Currently kernel has an API set_numa_mem that sets node_numa_mem for memoryless node. However this API cannot be used for offline nodes. Hence all offline nodes will have their node_numa_mem set to 0. However systems can themselves have node 0 as offline i.e memoryless and cpuless at this time. In such cases, node_to_mem_node() fails to provide a N_MEMORY fallback node. Mitigate this by having a new API that sets the default node_numa_mem for offline nodes to be first_memory_node. Cc: Andrew Morton Cc: linux-mm@kvack.org Cc: Mel Gorman Cc: Michael Ellerman Cc: Sachin Sant Cc: Michal Hocko Cc: Christopher Lameter Cc: linuxppc-dev@lists.ozlabs.org Cc: Joonsoo Kim Cc: Kirill Tkhai Cc: Vlastimil Babka Cc: Srikar Dronamraju Cc: Bharata B Rao Cc: Nathan Lynch Reported-by: Sachin Sant Tested-by: Sachin Sant Signed-off-by: Srikar Dronamraju --- include/asm-generic/topology.h | 3 +++ include/linux/topology.h | 7 +++++++ 2 files changed, 10 insertions(+) diff --git a/include/asm-generic/topology.h b/include/asm-generic/topology.h index 238873739550..e803ee7850e6 100644 --- a/include/asm-generic/topology.h +++ b/include/asm-generic/topology.h @@ -68,6 +68,9 @@ #ifndef set_numa_mem #define set_numa_mem(node) #endif +#ifndef reset_numa_mem +#define reset_numa_mem(node) +#endif #ifndef set_cpu_numa_mem #define set_cpu_numa_mem(cpu, node) #endif diff --git a/include/linux/topology.h b/include/linux/topology.h index eb2fe6edd73c..bebda80038bf 100644 --- a/include/linux/topology.h +++ b/include/linux/topology.h @@ -147,6 +147,13 @@ static inline int node_to_mem_node(int node) } #endif +#ifndef reset_numa_mem +static inline void reset_numa_mem(int node) +{ + _node_numa_mem_[node] = first_memory_node; +} +#endif + #ifndef numa_mem_id /* Returns the number of the nearest Node with memory */ static inline int numa_mem_id(void) -- 2.18.1