From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752878AbcFOGSE (ORCPT ); Wed, 15 Jun 2016 02:18:04 -0400 Received: from mga14.intel.com ([192.55.52.115]:44070 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750801AbcFOGSC (ORCPT ); Wed, 15 Jun 2016 02:18:02 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.26,474,1459839600"; d="scan'208";a="987738188" From: Yuyang Du To: peterz@infradead.org, mingo@kernel.org, linux-kernel@vger.kernel.org Cc: umgwanakikbuti@gmail.com, bsegall@google.com, pjt@google.com, morten.rasmussen@arm.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, matt@codeblueprint.co.uk, Yuyang Du Subject: [PATCH v6 0/4] sched/fair: Fix attach and detach sched avgs for task group change and sched class change Date: Wed, 15 Jun 2016 06:21:06 +0800 Message-Id: <1465942870-28419-1-git-send-email-yuyang.du@intel.com> X-Mailer: git-send-email 1.7.9.5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Peter, The attach/detach twice problem is worse than Vincent reported. The attach twice issue can happen not only as Vincent raised when task moves between groups, but also when switching to fair class. In addition, for newly forked task, the detach also has a problem. This patchset attempts to address all of those problems. Thanks a lot to Vincent and Peter. This new version addresses their comments to reword the changelog and comments. Also thanks to Matt for the suggestion to fix the newly forked task's detach problem easier. This version also incorporates Peter's suggestion to unify the 'new' task test in vruntime_normalized(), detach_entity_load_avg(), and remove_entity_load_avg(). Thanks, Yuyang -- Yuyang Du (4): sched/fair: Fix attaching task sched avgs twice when switching to fair or changing task group sched/fair: Move load and util avgs from wake_up_new_task() to sched_fork() sched/fair: Skip detach sched avgs for new task when changing task groups sched/fair: Add inline to detach_entity_load_evg() kernel/sched/core.c | 5 +-- kernel/sched/fair.c | 98 +++++++++++++++++++++++++++++--------------------- kernel/sched/sched.h | 2 +- 3 files changed, 62 insertions(+), 43 deletions(-) -- 1.7.9.5