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SubjectRe: [GIT PULL] timers update for 3.15
On Thu, Feb 27, 2014 at 01:17:07PM +0100, Ingo Molnar wrote:
>
> * Frederic Weisbecker <fweisbec@gmail.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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