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=-11.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 B1BC2C49EA2 for ; Mon, 21 Jun 2021 18:49:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9B29B60FEE for ; Mon, 21 Jun 2021 18:49:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231853AbhFUSwG (ORCPT ); Mon, 21 Jun 2021 14:52:06 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:29389 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230160AbhFUSwE (ORCPT ); Mon, 21 Jun 2021 14:52:04 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1624301389; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc; bh=8+0lAgdKmEikh/Be8Z1O35k9BkrQgmcKMiwbRtHdQCs=; b=dVQdNttU3tKfzfWTvtrWrw+oQBINFyk3UXurvyJv3qP7wAJn2VyH2p+i8nhJOk35qvZKe6 8sAz2Eqm4QHqx3AR4ScMnlyEO/NT8Tegjy7tWvo8K44zaQcH7q9yFx6Z1zI7aQQr35i6s9 9xN5aVlP6mAQhSM2TQeGIB7VDuU4mKI= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-356-zSqeXrXOMZ6GWiIus38YDg-1; Mon, 21 Jun 2021 14:49:47 -0400 X-MC-Unique: zSqeXrXOMZ6GWiIus38YDg-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 86E7D653; Mon, 21 Jun 2021 18:49:45 +0000 (UTC) Received: from llong.com (ovpn-114-127.rdu2.redhat.com [10.10.114.127]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2DE705D9CA; Mon, 21 Jun 2021 18:49:37 +0000 (UTC) From: Waiman Long To: Tejun Heo , Zefan Li , Johannes Weiner , Jonathan Corbet , Shuah Khan Cc: cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, Andrew Morton , Roman Gushchin , Phil Auld , Peter Zijlstra , Juri Lelli , Waiman Long Subject: [PATCH v2 0/6] cgroup/cpuset: Add new cpuset partition type & empty effecitve cpus Date: Mon, 21 Jun 2021 14:49:18 -0400 Message-Id: <20210621184924.27493-1-longman@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org v2: - Drop v1 patch 1. - Break out some cosmetic changes into a separate patch (patch #1). - Add a new patch to clarify the transition to invalid partition root is mainly caused by hotplug events. - Enhance the partition root state test including CPU online/offline behavior and fix issues found by the test. This patchset makes the following three major changes to the cpuset v2 code: Patch 2: Clarify the use of invalid partition root and add new checks to make sure that normal cpuset control file operations will not be allowed to create invalid partition root. It also fixes some of the issues in existing code. Patch 3: Add a new partition state "isolated" to create a partition root without load balancing. This is for handling intermitten workloads that have a strict low latency requirement. Patch 4: Allow partition roots that are not the top cpuset to distribute all its cpus to child partitions as long as there is no task associated with that partition root. This allows more flexibility for middleware to manage multiple partitions. Patch 5 updates the cgroup-v2.rst file accordingly. Patch 5 adds a new cpuset test to test the new cpuset partition code. Waiman Long (6): cgroup/cpuset: Miscellaneous code cleanup cgroup/cpuset: Clarify the use of invalid partition root cgroup/cpuset: Add a new isolated cpus.partition type cgroup/cpuset: Allow non-top parent partition root to distribute out all CPUs cgroup/cpuset: Update description of cpuset.cpus.partition in cgroup-v2.rst kselftest/cgroup: Add cpuset v2 partition root state test Documentation/admin-guide/cgroup-v2.rst | 65 +- kernel/cgroup/cpuset.c | 285 ++++++--- tools/testing/selftests/cgroup/Makefile | 2 +- .../selftests/cgroup/test_cpuset_prs.sh | 558 ++++++++++++++++++ 4 files changed, 794 insertions(+), 116 deletions(-) create mode 100755 tools/testing/selftests/cgroup/test_cpuset_prs.sh -- 2.18.1