From patchwork Tue Mar 17 13:17:52 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Srikar Dronamraju X-Patchwork-Id: 11442913 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4A9281667 for ; Tue, 17 Mar 2020 13:20:56 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 20D3120752 for ; Tue, 17 Mar 2020 13:20:56 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 20D3120752 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=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 398C46B0008; Tue, 17 Mar 2020 09:20:55 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 322786B000A; Tue, 17 Mar 2020 09:20:55 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 210636B000C; Tue, 17 Mar 2020 09:20:55 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0027.hostedemail.com [216.40.44.27]) by kanga.kvack.org (Postfix) with ESMTP id 096946B0008 for ; Tue, 17 Mar 2020 09:20:55 -0400 (EDT) Received: from smtpin05.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id D1CF4181AC9B6 for ; Tue, 17 Mar 2020 13:20:54 +0000 (UTC) X-FDA: 76604914428.05.ducks79_2503f226bb628 X-Spam-Summary: 2,0,0,8957cca0c68d16e8,d41d8cd98f00b204,srikar@linux.vnet.ibm.com,,RULES_HIT:41:355:379:541:800:960:973:988:989:1260:1261:1345:1359:1431:1437:1535:1542:1711:1730:1747:1777:1792:1981:2194:2198:2199:2200:2393:2559:2562:2693:3138:3139:3140:3141:3142:3353:3865:3866:3867:3868:3870:3874:4250:4321:4605:5007:6261:6742:7903:7904:10004:11026:11658:11914:12043:12297:12555:12895:12986:13221:13229:13846:14181:14394:14721:21080:21451:21627:21990:30034:30054,0,RBL:148.163.158.5:@linux.vnet.ibm.com:.lbl8.mailshell.net-62.8.0.100 64.201.201.201,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fn,MSBL:0,DNSBL:none,Custom_rules:0:0:0,LFtime:24,LUA_SUMMARY:none X-HE-Tag: ducks79_2503f226bb628 X-Filterd-Recvd-Size: 5952 Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by imf12.hostedemail.com (Postfix) with ESMTP for ; Tue, 17 Mar 2020 13:20:54 +0000 (UTC) Received: from pps.filterd (m0127361.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 02HD4FqD148238 for ; Tue, 17 Mar 2020 09:20:53 -0400 Received: from e06smtp04.uk.ibm.com (e06smtp04.uk.ibm.com [195.75.94.100]) by mx0a-001b2d01.pphosted.com with ESMTP id 2yrt352uyp-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 17 Mar 2020 09:20:52 -0400 Received: from localhost by e06smtp04.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 17 Mar 2020 13:20:47 -0000 Received: from b06wcsmtp001.portsmouth.uk.ibm.com (b06wcsmtp001.portsmouth.uk.ibm.com [9.149.105.160]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 02HDKkMk55050322 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 17 Mar 2020 13:20:46 GMT Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4DB5DA4060; Tue, 17 Mar 2020 13:20:46 +0000 (GMT) Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1331CA4054; Tue, 17 Mar 2020 13:20:43 +0000 (GMT) Received: from srikart450.in.ibm.com (unknown [9.85.71.34]) by b06wcsmtp001.portsmouth.uk.ibm.com (Postfix) with ESMTP; Tue, 17 Mar 2020 13:20:42 +0000 (GMT) From: Srikar Dronamraju To: Andrew Morton Cc: Srikar Dronamraju , linux-mm@kvack.org, Mel Gorman , Michael Ellerman , Sachin Sant , Michal Hocko , Christopher Lameter , linuxppc-dev@lists.ozlabs.org, Joonsoo Kim , Kirill Tkhai , Vlastimil Babka , Bharata B Rao Subject: [PATCH 3/4] mm: Implement reset_numa_mem Date: Tue, 17 Mar 2020 18:47:52 +0530 X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200317131753.4074-1-srikar@linux.vnet.ibm.com> References: <3381CD91-AB3D-4773-BA04-E7A072A63968@linux.vnet.ibm.com> <20200317131753.4074-1-srikar@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 20031713-0016-0000-0000-000002F2929B X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20031713-0017-0000-0000-00003356131A Message-Id: <20200317131753.4074-4-srikar@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.645 definitions=2020-03-17_04:2020-03-17,2020-03-17 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 mlxlogscore=974 mlxscore=0 spamscore=0 bulkscore=0 phishscore=0 lowpriorityscore=0 suspectscore=0 clxscore=1015 impostorscore=0 malwarescore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2003170056 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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 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)