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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2F010C6FD1C for ; Wed, 22 Mar 2023 14:00:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230516AbjCVOAO (ORCPT ); Wed, 22 Mar 2023 10:00:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42182 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229806AbjCVOAM (ORCPT ); Wed, 22 Mar 2023 10:00:12 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 4735626B1; Wed, 22 Mar 2023 07:00:09 -0700 (PDT) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id D91B24B3; Wed, 22 Mar 2023 07:00:52 -0700 (PDT) Received: from e125579.fritz.box (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 42C033F71E; Wed, 22 Mar 2023 07:00:06 -0700 (PDT) From: Dietmar Eggemann To: Ingo Molnar , Peter Zijlstra , Juri Lelli , Waiman Long , Tejun Heo , Zefan Li , Johannes Weiner , Hao Luo Cc: Steven Rostedt , Vincent Guittot , Daniel Bristot de Oliveira , Luca Abeni , Tommaso Cucinotta , Qais Yousef , Wei Wang , linux-kernel@vger.kernel.org, cgroups@vger.kernel.org Subject: [RFC PATCH 0/2] sched/cpuset: Fix DL BW accounting in case can_attach() fails Date: Wed, 22 Mar 2023 14:59:57 +0100 Message-Id: <20230322135959.1998790-1-dietmar.eggemann@arm.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org I followed Longman's idea to add a `deadline task transfer count` into cpuset and only update the `dl task count` in cpuset_attach(). Moreover, I switched from per-task DL BW request to a per-cpuset one. This way we don't have to free per-task in case xxx_can_attach() fails. The DL BW freeing is handled in cpuset_cancel_attach() for the case `multiple controllers and one of the non-cpuset can_attach() fails`. Only lightly tested on cgroup v1 with exclusive cpusets so far. Dietmar Eggemann (2): sched/deadline: Create DL BW alloc, free & check overflow interface cgroup/cpuset: Free DL BW in case can_attach() fails include/linux/sched.h | 4 ++- kernel/cgroup/cpuset.c | 55 +++++++++++++++++++++++++++++++++++++---- kernel/sched/core.c | 19 +++----------- kernel/sched/deadline.c | 53 +++++++++++++++++++++++++++++---------- kernel/sched/sched.h | 2 +- 5 files changed, 97 insertions(+), 36 deletions(-) -- 2.25.1