linux-kernel - Re: [GIT PULL] timers update for 3.15

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Message-ID: <20140227125306.GA17608@localhost.localdomain>
Date:	Thu, 27 Feb 2014 13:53:09 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Paul Gortmaker <paul.gortmaker@...driver.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Viresh Kumar <viresh.kumar@...aro.org>
Subject: Re: [GIT PULL] timers update for 3.15

On Thu, Feb 27, 2014 at 01:17:07PM +0100, Ingo Molnar wrote:
> 
> * Frederic Weisbecker <fweisbec@...il.com> wrote:
> 
> > Ingo,
> > 
> > Please pull the timers/core branch that can be found at:
> > 
> > git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git
> > 	timers/core
> > ---
> > 
> > * The patch from Viresh removes some unecessary scheduler IPIs that wake
> >   up the CPUs when deferrable timers are enqueued on remote targets.
> > 
> >   In practice I have seen on boot some of these IPIs from various
> >   sources:  MCE, vmstat/SLAB, cpufreq. They happen either on initcall
> >   or cpu hotplug. Since these timers are enqueued on all CPUs, there
> >   are some potential big rounds of IPIs that are spared with this patch.
> >   
> >   But it's just what I've seen on my own machine on boot. I expect some
> >   more scenarios where a few IPIs will be avoided depending on configs
> >   and usecases because we have some more users of deferrable timers.
> > 
> > * Kconfig text made clearer for full dynticks by Paul Gortmaker.
> > 
> > Thanks,
> > 	Frederic
> > ---
> > 
> > Paul Gortmaker (1):
> >       nohz: ensure users are aware boot CPU is not NO_HZ_FULL
> > 
> > Viresh Kumar (1):
> >       timer: Spare IPI when deferrable timer is queued on idle remote targets
> > 
> > 
> >  kernel/time/Kconfig | 2 +-
> >  kernel/timer.c      | 9 ++++++++-
> >  2 files changed, 9 insertions(+), 2 deletions(-)
> 
> So I wanted to pull this fine set of commits, just to discover that 
> Thomas already pulled it into timers/core :-)

Ah! Now I understand why it was pulled silently in the evening ;)
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