Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751244AbaA3Ism (ORCPT ); Thu, 30 Jan 2014 03:48:42 -0500 Received: from e32.co.us.ibm.com ([32.97.110.150]:53500 "EHLO e32.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751122AbaA3Isk (ORCPT ); Thu, 30 Jan 2014 03:48:40 -0500 Date: Thu, 30 Jan 2014 00:48:35 -0800 From: "Paul E. McKenney" To: Preeti Murthy Cc: mingo@kernel.org, josh@joshtriplett.org, Peter Zijlstra , oleg@redhat.com, rostedt@goodmis.org, bitbucket@online.de, Thomas Gleixner , LKML , Preeti U Murthy Subject: Re: [GIT PULL timers] Timer-wheel bandaids^Wcommits Message-ID: <20140130084835.GC9012@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <20140129233936.GA11150@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 14013008-0928-0000-0000-0000061868D4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jan 30, 2014 at 11:14:57AM +0530, Preeti Murthy wrote: > Hi Paul, > > The commit id:e1d690cdc07637131ba4334: timers: Track total number of > timers in list has > a minor glitch in the changelog. > > I am referring to your > git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git > rcu/timers branch. > > "even if ->active_timers is zero, there might well be *non-deferrable* > timers in the list" > > s/non-deferrable/deferrable. Good catch, fixed! New pull request below, very similar to the last one. Thanx, Paul ------------------------------------------------------------------------ Hello, Ingo, This pull request contains latency bandaids^Woptimizations to the timer-wheel code that are useful in conjunction with NO_HZ_FULL Kconfig option. These optimizations reduce the jiffy-by-jiffy looping in cases where there is either zero or one timers in the timer wheel, which is a common case for NO_HZ_FULL "worker" CPUs that run almost entirely in usermode for a single task. Each of these commits has at least two Reviewed-by, one Acked-by, and one Tested-by tag, so they are ready for more extensive testing in -tip. Thanx, Paul The following changes since commit 00e2bcd6d35f59fce7fa0e76e24d08f74c6a8506: clocksource: Timer-sun5i: Switch to sched_clock_register() (2014-01-19 13:23:23 +0100) are available in the git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/timers for you to fetch changes up to 73bffac4cf615295055df086e95d0284754aa708 timers: Make internal_add_timer() update ->next_timer if ->active_timers == 0 (2014-01-30 00:41:53 -0800) ---------------------------------------------------------------- Oleg Nesterov (1): timers: Make internal_add_timer() update ->next_timer if ->active_timers == 0 Paul E. McKenney (4): timers: Track total number of timers in list timers: Reduce __run_timers() latency for empty list timers: Reduce future __run_timers() latency for newly emptied list timers: Reduce future __run_timers() latency for first add to empty list kernel/timer.c | 30 ++++++++++++++++++++++++++++-- 1 file changed, 28 insertions(+), 2 deletions(-) -- 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/