Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753549AbaFRQsr (ORCPT ); Wed, 18 Jun 2014 12:48:47 -0400 Received: from mail-wi0-f175.google.com ([209.85.212.175]:54424 "EHLO mail-wi0-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753343AbaFRQsq (ORCPT ); Wed, 18 Jun 2014 12:48:46 -0400 Date: Wed, 18 Jun 2014 18:48:41 +0200 From: Ingo Molnar To: Frederic Weisbecker Cc: LKML , Peter Zijlstra , Andrew Morton , Kevin Hilman , "Paul E. McKenney" , Thomas Gleixner , Viresh Kumar , Eric Dumazet Subject: Re: [GIT PULL] nohz: Move nohz kick out of scheduler IPI, v9 Message-ID: <20140618164841.GA19204@gmail.com> References: <1402935790-19860-1-git-send-email-fweisbec@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1402935790-19860-1-git-send-email-fweisbec@gmail.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Frederic Weisbecker wrote: > Ingo, > > Please pull the timers/nohz-irq-work-v7 branch that can be found at: > > git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git > timers/nohz-irq-work-v7 > > It has been acked by Peterz. > > --- Summary --- > > This set moves the nohz kick, used to notify a full dynticks CPU when > events require tick rescheduling, out of the scheduler tick to a > dedicated IPI. > > This debloats a bit the scheduler IPI from off-topic work that was > abusing that scheduler fast path for its convenient asynchronous > properties. Now the nohz kick uses irq work for its own needs. > > Of course this implied quite some background infrastructure rework, > including: > > * Clean up some irq work internals > * Implement remote irq work > * Implement nohz kick on top of remote irq work > * Move full dynticks timer enqueue notification to new kick > * Move multi-task notification to new kick > * Remove unecessary barriers on multi-task notification > > Thanks, > Frederic > --- > > Frederic Weisbecker (6): > irq_work: Split raised and lazy lists > irq_work: Implement remote queueing > nohz: Support nohz full remote kick > nohz: Switch to nohz full remote kick on timer enqueue > nohz: Use nohz own full kick on 2nd task enqueue > nohz: Use IPI implicit full barrier against rq->nr_running r/w > > > include/linux/irq_work.h | 5 ++++ > include/linux/tick.h | 9 +++++- > kernel/irq_work.c | 76 ++++++++++++++++++++++++++++++------------------ > kernel/sched/core.c | 22 ++++++++------ > kernel/sched/sched.h | 12 ++++++-- > kernel/smp.c | 9 ++++++ > kernel/time/tick-sched.c | 10 ++++--- > 7 files changed, 97 insertions(+), 46 deletions(-) Pulled, thanks a lot Frederic! Ingo -- 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/