Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932789AbaAaTxc (ORCPT ); Fri, 31 Jan 2014 14:53:32 -0500 Received: from mail-pa0-f51.google.com ([209.85.220.51]:43425 "EHLO mail-pa0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932489AbaAaTxb (ORCPT ); Fri, 31 Jan 2014 14:53:31 -0500 From: Zoran Markovic To: linux-kernel@vger.kernel.org Cc: Shaibal Dutta , Lai Jiangshan , "Paul E. McKenney" , Dipankar Sarma Subject: [RFC PATCH] rcu: move SRCU grace period work to power efficient workqueue Date: Fri, 31 Jan 2014 11:53:06 -0800 Message-Id: <1391197986-12774-1-git-send-email-zoran.markovic@linaro.org> 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 From: Shaibal Dutta For better use of CPU idle time, allow the scheduler to select the CPU on which the SRCU grace period work would be scheduled. This improves idle residency time and conserves power. This functionality is enabled when CONFIG_WQ_POWER_EFFICIENT is selected. Cc: Lai Jiangshan Cc: "Paul E. McKenney" Cc: Dipankar Sarma Signed-off-by: Shaibal Dutta [zoran.markovic@linaro.org: Rebased to latest kernel version. Added commit message. Fixed code alignment.] --- kernel/rcu/srcu.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/kernel/rcu/srcu.c b/kernel/rcu/srcu.c index 3318d82..a1ebe6d 100644 --- a/kernel/rcu/srcu.c +++ b/kernel/rcu/srcu.c @@ -398,7 +398,7 @@ void call_srcu(struct srcu_struct *sp, struct rcu_head *head, rcu_batch_queue(&sp->batch_queue, head); if (!sp->running) { sp->running = true; - schedule_delayed_work(&sp->work, 0); + queue_delayed_work(system_power_efficient_wq, &sp->work, 0); } spin_unlock_irqrestore(&sp->queue_lock, flags); } @@ -674,7 +674,8 @@ static void srcu_reschedule(struct srcu_struct *sp) } if (pending) - schedule_delayed_work(&sp->work, SRCU_INTERVAL); + queue_delayed_work(system_power_efficient_wq, + &sp->work, SRCU_INTERVAL); } /* -- 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/