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 472F5C47098 for ; Thu, 3 Jun 2021 21:24:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 314DD60FE5 for ; Thu, 3 Jun 2021 21:24:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230116AbhFCV0k (ORCPT ); Thu, 3 Jun 2021 17:26:40 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:50723 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229719AbhFCV0j (ORCPT ); Thu, 3 Jun 2021 17:26:39 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1622755493; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc; bh=I7Je95OOknB79OPSw/FKhXFURHd0Sf3BEVJm/9BIKEw=; b=bnohuAg2YecIkqbajG00yS8pND2TgomI1VgBjiyuXgGPleGDoYKtt3qTsiROHIkS+j/PQ+ VPEBLA7z42/kjQcZr/CoZgfYBjzHkBzUFZ8m/SWgB6rH/aCF+ljfgz6An6yB3cuyKwtiSd 3q8AxpnmtAYhKYrRY124lp1i5IxwpuQ= 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-166-9iMlZqdCMdy7xsPCWHQhVw-1; Thu, 03 Jun 2021 17:24:52 -0400 X-MC-Unique: 9iMlZqdCMdy7xsPCWHQhVw-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 8838419253C3; Thu, 3 Jun 2021 21:24:50 +0000 (UTC) Received: from llong.com (ovpn-116-222.rdu2.redhat.com [10.10.116.222]) by smtp.corp.redhat.com (Postfix) with ESMTP id D20BB60D06; Thu, 3 Jun 2021 21:24:42 +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 0/5] cgroup/cpuset: Enable cpuset partition with no load balancing Date: Thu, 3 Jun 2021 17:24:11 -0400 Message-Id: <20210603212416.25934-1-longman@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patchset makes the following two major changes to the cpuset v2 code: Patch 2: Add a new partition state "root-nolb" to create a partition root with load balancing disabled. This is for handling intermitten workloads that have a strict low latency requirement. Patch 3: 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 4 updates the cgroup-v2.rst file accordingly. Patch 5 adds a test to test the new cpuset partition code. Waiman Long (5): cgroup/cpuset: Don't call validate_change() for some flag changes cgroup/cpuset: Add new cpus.partition type with no load balancing 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 | 19 ++- kernel/cgroup/cpuset.c | 124 +++++++++++---- tools/testing/selftests/cgroup/Makefile | 2 +- .../selftests/cgroup/test_cpuset_prs.sh | 141 ++++++++++++++++++ 4 files changed, 247 insertions(+), 39 deletions(-) create mode 100755 tools/testing/selftests/cgroup/test_cpuset_prs.sh -- 2.18.1