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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2015-11-17 10:56:55 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2015-12-04 12:26:52 -0800 |
| commit | 73f36f9de8bed78bcda2704a348594c20518b455 (patch) | |
| tree | 8fca805b595bcacf72541b01b1e2b0dd9c1bb100 | |
| parent | df5bd5144a80a9f6c3807383b11f735dae9caf9d (diff) | |
rcu: Make expedited grace periods resolve stall-warning ties
Currently, if a grace period ends just as the stall-warning timeout
fires, an empty stall warning will be printed. This is not helpful,
so this commit avoids these useless warnings by rechecking completion
after awakening in synchronize_sched_expedited_wait().
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
| -rw-r--r-- | kernel/rcu/tree.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 33d7e2551165..bc6b79716a86 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -3757,7 +3757,7 @@ static void synchronize_sched_expedited_wait(struct rcu_state *rsp) rsp->expedited_wq, sync_rcu_preempt_exp_done(rnp_root), jiffies_stall); - if (ret > 0) + if (ret > 0 || sync_rcu_preempt_exp_done(rnp_root)) return; if (ret < 0) { /* Hit a signal, disable CPU stall warnings. */ |