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=-3.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=no 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 94F62C7618B for ; Fri, 26 Jul 2019 08:29:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 74964216C8 for ; Fri, 26 Jul 2019 08:29:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726439AbfGZI3f (ORCPT ); Fri, 26 Jul 2019 04:29:35 -0400 Received: from foss.arm.com ([217.140.110.172]:39470 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725815AbfGZI3f (ORCPT ); Fri, 26 Jul 2019 04:29:35 -0400 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 69DAF344; Fri, 26 Jul 2019 01:29:34 -0700 (PDT) Received: from e107985-lin.arm.com (e107985-lin.cambridge.arm.com [10.1.194.38]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 402243F71A; Fri, 26 Jul 2019 01:29:33 -0700 (PDT) From: Dietmar Eggemann To: Peter Zijlstra , Ingo Molnar , Juri Lelli Cc: Luca Abeni , Daniel Bristot de Oliveira , Valentin Schneider , Qais Yousef , linux-kernel@vger.kernel.org Subject: [PATCH 0/5] sched/deadline: Fix double accounting in push_dl_task() & some cleanups Date: Fri, 26 Jul 2019 09:27:51 +0100 Message-Id: <20190726082756.5525-1-dietmar.eggemann@arm.com> X-Mailer: git-send-email 2.17.1 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org While running a simple DL workload (1 DL (12000, 100000, 100000) task per CPU) on Arm64 & x86 systems I noticed that some of the SCHED_WARN_ON() in the rq/running bandwidth (bw) functions trigger. Patch 1/5 contains a proposal to fix this. Patch 2-5/5 contain various smaller cleanups I discovered while debugging the actual issue. Dietmar Eggemann (5): sched/deadline: Fix double accounting of rq/running bw in push_dl_task() sched/deadline: Remove unused int flags from __dequeue_task_dl() sched/deadline: Use __sub_running_bw() throughout dl_change_utilization() sched/deadline: Cleanup on_dl_rq() handling sched/deadline: Use return value of SCHED_WARN_ON() in bw accounting kernel/sched/deadline.c | 28 ++++++++++------------------ 1 file changed, 10 insertions(+), 18 deletions(-) -- 2.17.1