Commit-ID: ae1670339c95c3ff96ab10582506cf827c5fecc8
Gitweb: http://git.kernel.org/tip/ae1670339c95c3ff96ab10582506cf827c5fecc8
Author: Shaibal Dutta <shaibal.dutta@xxxxxxxxxxxx>
AuthorDate: Fri, 31 Jan 2014 11:53:06 -0800
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
CommitDate: Mon, 17 Feb 2014 15:02:14 -0800
rcu: Move SRCU grace period work to power efficient workqueue
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 <laijs@xxxxxxxxxxxxxx>
Cc: "Paul E. McKenney" <paulmck@xxxxxxxxxxxxxxxxxx>
Cc: Dipankar Sarma <dipankar@xxxxxxxxxx>
Signed-off-by: Shaibal Dutta <shaibal.dutta@xxxxxxxxxxxx>
[zoran.markovic@xxxxxxxxxx: Rebased to latest kernel version. Added commit
message. Fixed code alignment.]
Signed-off-by: Zoran Markovic <zoran.markovic@xxxxxxxxxx>
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Josh Triplett <josh@xxxxxxxxxxxxxxxx>
---
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 5db7e92..2359779 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);
}
/*
--
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