From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on archive.lwn.net X-Spam-Level: X-Spam-Status: No, score=-5.8 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham autolearn_force=no version=3.4.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by archive.lwn.net (Postfix) with ESMTP id 97FE97D09E for ; Thu, 17 May 2018 20:56:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752195AbeEQU4R (ORCPT ); Thu, 17 May 2018 16:56:17 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:33260 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752188AbeEQUz7 (ORCPT ); Thu, 17 May 2018 16:55:59 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id D4EF381FE14F; Thu, 17 May 2018 20:55:58 +0000 (UTC) Received: from llong.com (dhcp-17-164.bos.redhat.com [10.18.17.164]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6FFDB2024CBF; Thu, 17 May 2018 20:55:58 +0000 (UTC) From: Waiman Long To: Tejun Heo , Li Zefan , Johannes Weiner , Peter Zijlstra , Ingo Molnar Cc: cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, kernel-team@fb.com, pjt@google.com, luto@amacapital.net, Mike Galbraith , torvalds@linux-foundation.org, Roman Gushchin , Juri Lelli , Waiman Long Subject: [PATCH v8 6/6] cpuset: Allow reporting of sched domain generation info Date: Thu, 17 May 2018 16:55:45 -0400 Message-Id: <1526590545-3350-7-git-send-email-longman@redhat.com> In-Reply-To: <1526590545-3350-1-git-send-email-longman@redhat.com> References: <1526590545-3350-1-git-send-email-longman@redhat.com> X-Scanned-By: MIMEDefang 2.78 on 10.11.54.4 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.8]); Thu, 17 May 2018 20:55:58 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.8]); Thu, 17 May 2018 20:55:58 +0000 (UTC) for IP:'10.11.54.4' DOMAIN:'int-mx04.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'longman@redhat.com' RCPT:'' Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org This patch enables us to report sched domain generation information. If DYNAMIC_DEBUG is enabled, issuing the following command echo "file cpuset.c +p" > /sys/kernel/debug/dynamic_debug/control and setting loglevel to 8 will allow the kernel to show what scheduling domain changes are being made. Signed-off-by: Waiman Long --- kernel/cgroup/cpuset.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c index fb8aa82b..8f586e8 100644 --- a/kernel/cgroup/cpuset.c +++ b/kernel/cgroup/cpuset.c @@ -820,6 +820,12 @@ static int generate_sched_domains(cpumask_var_t **domains, } BUG_ON(nslot != ndoms); +#ifdef CONFIG_DEBUG_KERNEL + for (i = 0; i < ndoms; i++) + pr_debug("generate_sched_domains dom %d: %*pbl\n", i, + cpumask_pr_args(doms[i])); +#endif + done: kfree(csa); -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html