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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2015-12-31 19:48:36 +0300 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2016-03-31 23:34:49 +0300 |
| commit | 86057b80ae31d37fcbdb5f57d15aaf1148c69f96 (patch) | |
| tree | 8b7ec833f68738a933d647e1d85056e66e85c49f | |
| parent | 274529ba9bda86c91c2c06da3a641aaf617dd30f (diff) | |
| download | linux-86057b80ae31d37fcbdb5f57d15aaf1148c69f96.tar.xz | |
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 <paulmck@linux.vnet.ibm.com>
| -rw-r--r-- | kernel/rcu/tree.c | 4 |
1 files changed, 3 insertions, 1 deletions
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); + } } } |