From b24efdfdf679cf9b05947c531971905fc727dd40 Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Wed, 12 Jan 2011 14:18:11 -0800 Subject: [PATCH] rcu: avoid pointless blocked-task warnings If the RCU callback-processing kthread has nothing to do, it parks in a wait_event(). If RCU remains idle for more than two minutes, the kernel complains about this. This commit changes from wait_event() to wait_event_interruptible() to prevent the kernel from complaining just because RCU is idle. Reported-by: Russell King Signed-off-by: Paul E. McKenney Signed-off-by: Paul E. McKenney Tested-by: Thomas Weber Tested-by: Russell King --- kernel/rcutiny.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/rcutiny.c b/kernel/rcutiny.c index 034493724749..0c343b9a46d5 100644 --- a/kernel/rcutiny.c +++ b/kernel/rcutiny.c @@ -189,7 +189,8 @@ static int rcu_kthread(void *arg) unsigned long flags; for (;;) { - wait_event(rcu_kthread_wq, have_rcu_kthread_work != 0); + wait_event_interruptible(rcu_kthread_wq, + have_rcu_kthread_work != 0); morework = rcu_boost(); local_irq_save(flags); work = have_rcu_kthread_work; -- 2.20.1