From baa1ae0c9f1c618bc60706efa75fef3508bcee58 Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Sat, 26 Mar 2011 22:01:35 -0700 Subject: [PATCH] rcu: further lower priority in rcu_yield() Although rcu_yield() dropped from real-time to normal priority, there is always the possibility that the competing tasks have been niced. So nice to 19 in rcu_yield() to help ensure that other tasks have a better chance of running. Signed-off-by: Paul E. McKenney Signed-off-by: Paul E. McKenney Reviewed-by: Josh Triplett --- kernel/rcutree.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/rcutree.c b/kernel/rcutree.c index 2c07adb9708..fe85600ba8c 100644 --- a/kernel/rcutree.c +++ b/kernel/rcutree.c @@ -1561,6 +1561,7 @@ static void rcu_yield(void (*f)(unsigned long), unsigned long arg) mod_timer(&yield_timer, jiffies + 2); sp.sched_priority = 0; sched_setscheduler_nocheck(current, SCHED_NORMAL, &sp); + set_user_nice(current, 19); schedule(); sp.sched_priority = RCU_KTHREAD_PRIO; sched_setscheduler_nocheck(current, SCHED_FIFO, &sp); -- 2.20.1