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authorShaibal Dutta <shaibal.dutta@broadcom.com>2014-01-31 11:53:06 -0800
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2014-02-17 15:02:14 -0800
commitae1670339c95c3ff96ab10582506cf827c5fecc8 (patch)
tree65f8d452bd742cf8942abdfb1a427ab20310dd81 /kernel/rcu
parent52e2bb958ac4f9b3c4bdd78606d279852fd72922 (diff)
downloadlinux-ae1670339c95c3ff96ab10582506cf827c5fecc8.tar.bz2
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@cn.fujitsu.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Cc: Dipankar Sarma <dipankar@in.ibm.com> Signed-off-by: Shaibal Dutta <shaibal.dutta@broadcom.com> [zoran.markovic@linaro.org: Rebased to latest kernel version. Added commit message. Fixed code alignment.] Signed-off-by: Zoran Markovic <zoran.markovic@linaro.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'kernel/rcu')
-rw-r--r--kernel/rcu/srcu.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/kernel/rcu/srcu.c b/kernel/rcu/srcu.c
index 5db7e9272d37..2359779e1daa 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);
}
/*