From 86057b80ae31d37fcbdb5f57d15aaf1148c69f96 Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Thu, 31 Dec 2015 08:48:36 -0800 Subject: rcu: Awaken grace-period kthread when stalled Recent kernels can fail to awaken the grace-period kthread for quiescent-state forcing. This commit is a crude hack that does a wakeup any time a stall is detected. Signed-off-by: Paul E. McKenney --- kernel/rcu/tree.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 531a328076bd..a327a253c178 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -1224,8 +1224,10 @@ static void rcu_check_gp_kthread_starvation(struct rcu_state *rsp) rsp->gp_flags, gp_state_getname(rsp->gp_state), rsp->gp_state, rsp->gp_kthread ? rsp->gp_kthread->state : ~0); - if (rsp->gp_kthread) + if (rsp->gp_kthread) { sched_show_task(rsp->gp_kthread); + wake_up_process(rsp->gp_kthread); + } } } -- cgit v1.2.3