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=-5.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY, USER_AGENT_SANE_1 autolearn=ham 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 7CFC5C432C3 for ; Tue, 3 Dec 2019 09:25:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 43282206E0 for ; Tue, 3 Dec 2019 09:25:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726224AbfLCJZz (ORCPT ); Tue, 3 Dec 2019 04:25:55 -0500 Received: from out30-57.freemail.mail.aliyun.com ([115.124.30.57]:39596 "EHLO out30-57.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725774AbfLCJZy (ORCPT ); Tue, 3 Dec 2019 04:25:54 -0500 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R121e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04395;MF=yun.wang@linux.alibaba.com;NM=1;PH=DS;RN=7;SR=0;TI=SMTPD_---0Tjo4jQE_1575365150; Received: from testdeMacBook-Pro.local(mailfrom:yun.wang@linux.alibaba.com fp:SMTPD_---0Tjo4jQE_1575365150) by smtp.aliyun-inc.com(127.0.0.1); Tue, 03 Dec 2019 17:25:52 +0800 Subject: Re: [PATCH RESEND] sched/numa: expose per-task pages-migration-failure To: Ingo Molnar Cc: Ingo Molnar , Peter Zijlstra , Juri Lelli , =?UTF-8?Q?Michal_Koutn=c3=bd?= , Mel Gorman , Linux Kernel Mailing List References: <7038afda-dd08-f01f-5da0-afadf76f5533@linux.alibaba.com> <20191203071615.GD115767@gmail.com> From: =?UTF-8?B?546L6LSH?= Message-ID: Date: Tue, 3 Dec 2019 17:25:49 +0800 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 In-Reply-To: <20191203071615.GD115767@gmail.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2019/12/3 下午3:16, Ingo Molnar wrote: [snip] >> kernel/sched/debug.c | 1 + >> 1 file changed, 1 insertion(+) >> >> diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c >> index f7e4579e746c..73c4809c8f37 100644 >> --- a/kernel/sched/debug.c >> +++ b/kernel/sched/debug.c >> @@ -848,6 +848,7 @@ static void sched_show_numa(struct task_struct *p, struct seq_file *m) >> P(total_numa_faults); >> SEQ_printf(m, "current_node=%d, numa_group_id=%d\n", >> task_node(p), task_numa_group_id(p)); >> + SEQ_printf(m, "migfailed=%lu\n", p->numa_faults_locality[2]); > > Any reason not to expose the other 2 fields of this array as well, which > show remote/local migrations? The rest are local/remote faults counter, AFAIK not related to migration, when the CPU triggered PF is from the same node of page (before migration), local faults increased. Regards, Michael Wang > > Thanks, > > Ingo >