On Mon, Feb 10, 2014 at 06:08:31PM +0800, Lai Jiangshan wrote: > Acked-by: Lai Jiangshan <la...@cn.fujitsu.com>
Thank you all, queued for 3.15. We should also have some facility for moving the SRCU workqueues to housekeeping/timekeeping kthreads in the NO_HZ_FULL case. Or does this patch already have that effect? Thanx, Paul > On 02/01/2014 03:53 AM, Zoran Markovic wrote: > > From: Shaibal Dutta <shaibal.du...@broadcom.com> > > > > For better use of CPU idle time, allow the scheduler to select the CPU > > on which the SRCU grace period work would be scheduled. This improves > > idle residency time and conserves power. > > > > This functionality is enabled when CONFIG_WQ_POWER_EFFICIENT is selected. > > > > Cc: Lai Jiangshan <la...@cn.fujitsu.com> > > Cc: "Paul E. McKenney" <paul...@linux.vnet.ibm.com> > > Cc: Dipankar Sarma <dipan...@in.ibm.com> > > Signed-off-by: Shaibal Dutta <shaibal.du...@broadcom.com> > > [zoran.marko...@linaro.org: Rebased to latest kernel version. Added commit > > message. Fixed code alignment.] > > --- > > kernel/rcu/srcu.c | 5 +++-- > > 1 file changed, 3 insertions(+), 2 deletions(-) > > > > diff --git a/kernel/rcu/srcu.c b/kernel/rcu/srcu.c > > index 3318d82..a1ebe6d 100644 > > --- a/kernel/rcu/srcu.c > > +++ b/kernel/rcu/srcu.c > > @@ -398,7 +398,7 @@ void call_srcu(struct srcu_struct *sp, struct rcu_head > > *head, > > rcu_batch_queue(&sp->batch_queue, head); > > if (!sp->running) { > > sp->running = true; > > - schedule_delayed_work(&sp->work, 0); > > + queue_delayed_work(system_power_efficient_wq, &sp->work, 0); > > } > > spin_unlock_irqrestore(&sp->queue_lock, flags); > > } > > @@ -674,7 +674,8 @@ static void srcu_reschedule(struct srcu_struct *sp) > > } > > > > if (pending) > > - schedule_delayed_work(&sp->work, SRCU_INTERVAL); > > + queue_delayed_work(system_power_efficient_wq, > > + &sp->work, SRCU_INTERVAL); > > } > > > > /* > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/