Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751062AbaA3Fo6 (ORCPT ); Thu, 30 Jan 2014 00:44:58 -0500 Received: from mail-oa0-f43.google.com ([209.85.219.43]:46984 "EHLO mail-oa0-f43.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750982AbaA3Fo5 (ORCPT ); Thu, 30 Jan 2014 00:44:57 -0500 MIME-Version: 1.0 In-Reply-To: <20140129233936.GA11150@linux.vnet.ibm.com> References: <20140129233936.GA11150@linux.vnet.ibm.com> Date: Thu, 30 Jan 2014 11:14:57 +0530 Message-ID: Subject: Re: [GIT PULL timers] Timer-wheel bandaids^Wcommits From: Preeti Murthy To: Paul McKenney Cc: mingo@kernel.org, josh@joshtriplett.org, Peter Zijlstra , oleg@redhat.com, rostedt@goodmis.org, bitbucket@online.de, Thomas Gleixner , LKML , Preeti U Murthy Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. Thanks Regards Preeti U Murthy On Thu, Jan 30, 2014 at 5:09 AM, Paul E. McKenney wrote: > 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 6f089d0be7fef9705b3a7755b05d1092e772b910: > > timers: Make internal_add_timer() update ->next_timer if ->active_timers == 0 (2014-01-29 15:25:16 -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/ -- 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/