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);
}
/*
--
1.7.9.5
--
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/
