Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759129Ab3DYRZQ (ORCPT ); Thu, 25 Apr 2013 13:25:16 -0400 Received: from mail-wi0-f175.google.com ([209.85.212.175]:41166 "EHLO mail-wi0-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759014Ab3DYRZN (ORCPT ); Thu, 25 Apr 2013 13:25:13 -0400 From: Vincent Guittot To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linaro-kernel@lists.linaro.org, peterz@infradead.org, mingo@kernel.org, linux@arm.linux.org.uk, pjt@google.com, santosh.shilimkar@ti.com, Morten.Rasmussen@arm.com, chander.kashyap@linaro.org, cmetcalf@tilera.com, tony.luck@intel.com, alex.shi@intel.com, preeti@linux.vnet.ibm.com Cc: paulmck@linux.vnet.ibm.com, tglx@linutronix.de, len.brown@intel.com, arjan@linux.intel.com, amit.kucheria@linaro.org, corbet@lwn.net, l.majewski@samsung.com, Vincent Guittot Subject: [PATCH 11/14] sched: filter task pull request Date: Thu, 25 Apr 2013 19:23:27 +0200 Message-Id: <1366910611-20048-12-git-send-email-vincent.guittot@linaro.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1366910611-20048-1-git-send-email-vincent.guittot@linaro.org> References: <1366910611-20048-1-git-send-email-vincent.guittot@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1684 Lines: 55 Only CPUs that participates to the packing effort can pull tasks on a busiest group. Signed-off-by: Vincent Guittot --- kernel/sched/fair.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 28f8ea7..6f63fb9 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -3494,6 +3494,12 @@ static bool is_buddy_full(int cpu) return (sum * 1024 >= period * 1000); } +static bool is_my_buddy(int cpu, int buddy) +{ + int my_buddy = per_cpu(sd_pack_buddy, cpu); + return (my_buddy == -1) || (buddy == my_buddy); +} + static bool is_light_task(struct task_struct *p) { /* A light task runs less than 20% in average */ @@ -4688,8 +4694,8 @@ static inline void update_sg_lb_stats(struct lb_env *env, /* Bias balancing toward cpus of our domain */ if (local_group) { - if (idle_cpu(i) && !first_idle_cpu && - cpumask_test_cpu(i, sched_group_mask(group))) { + if (is_my_buddy(i, i) && idle_cpu(i) && !first_idle_cpu + && cpumask_test_cpu(i, sched_group_mask(group))) { first_idle_cpu = 1; balance_cpu = i; } @@ -4817,6 +4823,10 @@ static void update_plb_buddy(int cpu, int *balance, struct sd_lb_stats *sds, /* Get my new buddy */ buddy = per_cpu(sd_pack_buddy, cpu); + + /* This CPU doesn't act for agressive packing */ + if (buddy != cpu) + sds->busiest = 0; } /** -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/