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

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Message-ID: <20140227121707.GE9712@gmail.com>
Date:	Thu, 27 Feb 2014 13:17:07 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	Frederic Weisbecker <fweisbec@...il.com>
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


* 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 :-)

	Ingo
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