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=unavailable 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 A51097DF91 for ; Tue, 29 May 2018 13:45:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934101AbeE2NnS (ORCPT ); Tue, 29 May 2018 09:43:18 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:54530 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S934355AbeE2NmP (ORCPT ); Tue, 29 May 2018 09:42:15 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id BDB6A401EF13; Tue, 29 May 2018 13:42:14 +0000 (UTC) Received: from llong.com (dhcp-17-81.bos.redhat.com [10.18.17.81]) by smtp.corp.redhat.com (Postfix) with ESMTP id EA2EA64663; Tue, 29 May 2018 13:42:13 +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 , Patrick Bellasi , Waiman Long Subject: [PATCH v9 5/7] cpuset: Expose cpus.effective and mems.effective on cgroup v2 root Date: Tue, 29 May 2018 09:41:32 -0400 Message-Id: <1527601294-3444-6-git-send-email-longman@redhat.com> In-Reply-To: <1527601294-3444-1-git-send-email-longman@redhat.com> References: <1527601294-3444-1-git-send-email-longman@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.11.54.5 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.5]); Tue, 29 May 2018 13:42:14 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.5]); Tue, 29 May 2018 13:42:14 +0000 (UTC) for IP:'10.11.54.5' DOMAIN:'int-mx05.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 Because of the fact that setting the "cpuset.sched.domain_root" in a direct child of root can remove CPUs from the root's effective CPU list, it makes sense to know what CPUs are left in the root cgroup for scheduling purpose. So the "cpuset.cpus.effective" control file is now exposed in the v2 cgroup root. For consistency, the "cpuset.mems.effective" control file is exposed as well. Signed-off-by: Waiman Long --- Documentation/cgroup-v2.txt | 4 ++-- kernel/cgroup/cpuset.c | 2 -- 2 files changed, 2 insertions(+), 4 deletions(-) diff --git a/Documentation/cgroup-v2.txt b/Documentation/cgroup-v2.txt index 681a809..b97f211 100644 --- a/Documentation/cgroup-v2.txt +++ b/Documentation/cgroup-v2.txt @@ -1474,7 +1474,7 @@ Cpuset Interface Files and won't be affected by any CPU hotplug events. cpuset.cpus.effective - A read-only multiple values file which exists on non-root + A read-only multiple values file which exists on all cpuset-enabled cgroups. It lists the onlined CPUs that are actually allowed to be @@ -1504,7 +1504,7 @@ Cpuset Interface Files and won't be affected by any memory nodes hotplug events. cpuset.mems.effective - A read-only multiple values file which exists on non-root + A read-only multiple values file which exists on all cpuset-enabled cgroups. It lists the onlined memory nodes that are actually allowed to diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c index 71cd920..f6ae483 100644 --- a/kernel/cgroup/cpuset.c +++ b/kernel/cgroup/cpuset.c @@ -2214,14 +2214,12 @@ static s64 cpuset_read_s64(struct cgroup_subsys_state *css, struct cftype *cft) .name = "cpus.effective", .seq_show = cpuset_common_seq_show, .private = FILE_EFFECTIVE_CPULIST, - .flags = CFTYPE_NOT_ON_ROOT, }, { .name = "mems.effective", .seq_show = cpuset_common_seq_show, .private = FILE_EFFECTIVE_MEMLIST, - .flags = CFTYPE_NOT_ON_ROOT, }, { -- 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