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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 75214C38A2A for ; Fri, 8 May 2020 13:21:44 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 26D4F206B9 for ; Fri, 8 May 2020 13:21:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 26D4F206B9 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 747538E0005; Fri, 8 May 2020 09:21:43 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 6F6698E0003; Fri, 8 May 2020 09:21:43 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5BE4E8E0005; Fri, 8 May 2020 09:21:43 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0128.hostedemail.com [216.40.44.128]) by kanga.kvack.org (Postfix) with ESMTP id 402898E0003 for ; Fri, 8 May 2020 09:21:43 -0400 (EDT) Received: from smtpin03.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id CBFE511935 for ; Fri, 8 May 2020 13:21:42 +0000 (UTC) X-FDA: 76793614044.03.bears82_eda857410e53 X-HE-Tag: bears82_eda857410e53 X-Filterd-Recvd-Size: 4755 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by imf48.hostedemail.com (Postfix) with ESMTP for ; Fri, 8 May 2020 13:21:41 +0000 (UTC) Received: from pps.filterd (m0098394.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 048D2DV0054976; Fri, 8 May 2020 09:21:38 -0400 Received: from ppma04fra.de.ibm.com (6a.4a.5195.ip4.static.sl-reverse.com [149.81.74.106]) by mx0a-001b2d01.pphosted.com with ESMTP id 30vtsemp3t-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 08 May 2020 09:21:38 -0400 Received: from pps.filterd (ppma04fra.de.ibm.com [127.0.0.1]) by ppma04fra.de.ibm.com (8.16.0.27/8.16.0.27) with SMTP id 048DKffI028238; Fri, 8 May 2020 13:21:35 GMT Received: from b06avi18878370.portsmouth.uk.ibm.com (b06avi18878370.portsmouth.uk.ibm.com [9.149.26.194]) by ppma04fra.de.ibm.com with ESMTP id 30s0g65exx-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 08 May 2020 13:21:35 +0000 Received: from d06av23.portsmouth.uk.ibm.com (d06av23.portsmouth.uk.ibm.com [9.149.105.59]) by b06avi18878370.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 048DLXTK66716056 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 8 May 2020 13:21:33 GMT Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 64268A405B; Fri, 8 May 2020 13:21:33 +0000 (GMT) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5854CA4055; Fri, 8 May 2020 13:21:31 +0000 (GMT) Received: from linux.vnet.ibm.com (unknown [9.126.150.29]) by d06av23.portsmouth.uk.ibm.com (Postfix) with SMTP; Fri, 8 May 2020 13:21:31 +0000 (GMT) Date: Fri, 8 May 2020 18:51:30 +0530 From: Srikar Dronamraju To: Christopher Lameter Cc: Andrew Morton , linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Michal Hocko , Mel Gorman , Vlastimil Babka , "Kirill A. Shutemov" , Michael Ellerman , Linus Torvalds , Gautham R Shenoy Subject: Re: [PATCH v3 1/3] powerpc/numa: Set numa_node for all possible cpus Message-ID: <20200508132130.GC1961@linux.vnet.ibm.com> Reply-To: Srikar Dronamraju References: <20200501031128.19584-1-srikar@linux.vnet.ibm.com> <20200501031128.19584-2-srikar@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216,18.0.676 definitions=2020-05-08_12:2020-05-08,2020-05-08 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 phishscore=0 bulkscore=0 impostorscore=0 malwarescore=0 clxscore=1015 mlxscore=0 lowpriorityscore=0 spamscore=0 mlxlogscore=999 priorityscore=1501 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2005080111 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: * Christopher Lameter [2020-05-02 22:55:16]: > On Fri, 1 May 2020, Srikar Dronamraju wrote: > > > - for_each_present_cpu(cpu) > > - numa_setup_cpu(cpu); > > + for_each_possible_cpu(cpu) { > > + /* > > + * Powerpc with CONFIG_NUMA always used to have a node 0, > > + * even if it was memoryless or cpuless. For all cpus that > > + * are possible but not present, cpu_to_node() would point > > + * to node 0. To remove a cpuless, memoryless dummy node, > > + * powerpc need to make sure all possible but not present > > + * cpu_to_node are set to a proper node. > > + */ > > + if (cpu_present(cpu)) > > + numa_setup_cpu(cpu); > > + else > > + set_cpu_numa_node(cpu, first_online_node); > > + } > > } > > > Can this be folded into numa_setup_cpu? > > This looks more like numa_setup_cpu needs to change? > We can fold this into numa_setup_cpu(). However till now we were sure that numa_setup_cpu() would be called only for a present cpu. That assumption will change. + (non-consequential) an additional check everytime cpu is hotplugged in. If Michael Ellerman is okay with the change, I can fold it in. -- Thanks and Regards Srikar Dronamraju