From patchwork Fri Sep 8 20:47:27 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Bringmann X-Patchwork-Id: 811825 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3xpqGx43lsz9sBW for ; Sat, 9 Sep 2017 06:51:05 +1000 (AEST) Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 3xpqGx2mJczDrcL for ; Sat, 9 Sep 2017 06:51:05 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=linux.vnet.ibm.com (client-ip=148.163.158.5; helo=mx0a-001b2d01.pphosted.com; envelope-from=mwb@linux.vnet.ibm.com; receiver=) 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 3xpqBx62JjzDrcP for ; Sat, 9 Sep 2017 06:47:37 +1000 (AEST) Received: from pps.filterd (m0098419.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id v88Ki4eb005967 for ; Fri, 8 Sep 2017 16:47:34 -0400 Received: from e37.co.us.ibm.com (e37.co.us.ibm.com [32.97.110.158]) by mx0b-001b2d01.pphosted.com with ESMTP id 2cv0vc3y8a-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Fri, 08 Sep 2017 16:47:34 -0400 Received: from localhost by e37.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Fri, 8 Sep 2017 14:47:29 -0600 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp07029.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v88KlTpC7012794; Fri, 8 Sep 2017 13:47:29 -0700 Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 697DC13603C; Fri, 8 Sep 2017 14:47:29 -0600 (MDT) Received: from oc1554177480.ibm.com (unknown [9.80.201.155]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTP id 5B47D13603A; Fri, 8 Sep 2017 14:47:28 -0600 (MDT) From: Michael Bringmann Organization: IBM Linux Technology Center To: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Subject: [PATCH V14 1/4] powerpc/vphn: Update CPU topology when VPHN enabled In-Reply-To: <74fb879c-19bf-3abf-4491-1f0db162e7d8@linux.vnet.ibm.com> Date: Fri, 8 Sep 2017 15:47:27 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.0 MIME-Version: 1.0 Content-Language: en-US X-TM-AS-GCONF: 00 x-cbid: 17090820-0024-0000-0000-0000172AD0E4 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00007691; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000227; SDB=6.00914193; UDB=6.00458905; IPR=6.00694451; BA=6.00005576; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00017073; XFM=3.00000015; UTC=2017-09-08 20:47:31 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17090820-0025-0000-0000-00004CA44803 Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-09-08_13:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1707230000 definitions=main-1709080310 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Nathan Fontenot , Michael Bringmann , John Allen Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" powerpc/vphn: On Power systems with shared configurations of CPUs and memory, there are some issues with the association of additional CPUs and memory to nodes when hot-adding resources. This patch corrects the currently broken capability to set the topology for shared CPUs in LPARs. At boot time for shared CPU lpars, the topology for each CPU was being set to node zero. Now when numa_update_cpu_topology() is called appropriately, the Virtual Processor Home Node (VPHN) capabilities information provided by the pHyp allows the appropriate node in the shared configuration to be selected for the CPU. Signed-off-by: Michael Bringmann --- Changes in V14: -- Cleanup some duplicate code. Change a trace stmt to debug. --- arch/powerpc/mm/numa.c | 22 +++++++++++++++++++++- 1 file changed, 21 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c index b95c584..3ae031d 100644 --- a/arch/powerpc/mm/numa.c +++ b/arch/powerpc/mm/numa.c @@ -1153,6 +1153,8 @@ struct topology_update_data { static int vphn_enabled; static int prrn_enabled; static void reset_topology_timer(void); +static int topology_inited; +static int topology_update_needed; /* * Store the current values of the associativity change counters in the @@ -1246,6 +1248,10 @@ static long vphn_get_associativity(unsigned long cpu, "hcall_vphn() experienced a hardware fault " "preventing VPHN. Disabling polling...\n"); stop_topology_update(); + break; + case H_SUCCESS: + dbg("VPHN hcall succeeded. Reset polling...\n"); + break; } return rc; @@ -1323,8 +1329,11 @@ int numa_update_cpu_topology(bool cpus_locked) struct device *dev; int weight, new_nid, i = 0; - if (!prrn_enabled && !vphn_enabled) + if (!prrn_enabled && !vphn_enabled) { + if (!topology_inited) + topology_update_needed = 1; return 0; + } weight = cpumask_weight(&cpu_associativity_changes_mask); if (!weight) @@ -1363,6 +1372,8 @@ int numa_update_cpu_topology(bool cpus_locked) cpumask_andnot(&cpu_associativity_changes_mask, &cpu_associativity_changes_mask, cpu_sibling_mask(cpu)); + dbg("Assoc chg gives same node %d for cpu%d\n", + new_nid, cpu); cpu = cpu_last_thread_sibling(cpu); continue; } @@ -1433,6 +1444,7 @@ int numa_update_cpu_topology(bool cpus_locked) out: kfree(updates); + topology_update_needed = 0; return changed; } @@ -1613,9 +1625,17 @@ static int topology_update_init(void) if (topology_updates_enabled) start_topology_update(); + if (vphn_enabled) + topology_schedule_update(); + if (!proc_create("powerpc/topology_updates", 0644, NULL, &topology_ops)) return -ENOMEM; + topology_inited = 1; + if (topology_update_needed) + bitmap_fill(cpumask_bits(&cpu_associativity_changes_mask), + nr_cpumask_bits); + return 0; } device_initcall(topology_update_init);