Commit-ID: 24a6cff286030b98149ff10b968cba31280fcb7a
Gitweb: http://git.kernel.org/tip/24a6cff286030b98149ff10b968cba31280fcb7a
Author: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
AuthorDate: Wed, 29 Jun 2016 14:49:29 -0700
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
CommitDate: Mon, 22 Aug 2016 09:30:26 -0700
rcu: Make expedited RCU CPU stall warnings respond to controls
The expedited RCU CPU stall warnings currently responds to neither the
panic_on_rcu_stall sysctl setting nor the rcupdate.rcu_cpu_stall_suppress
kernel boot parameter. This commit therefore updates the expedited code
to respond to these two controls.
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
---
kernel/rcu/tree_exp.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/kernel/rcu/tree_exp.h b/kernel/rcu/tree_exp.h
index 3a647eb..f316683 100644
--- a/kernel/rcu/tree_exp.h
+++ b/kernel/rcu/tree_exp.h
@@ -428,6 +428,9 @@ static void synchronize_sched_expedited_wait(struct rcu_state *rsp)
if (ret > 0 || sync_rcu_preempt_exp_done(rnp_root))
return;
WARN_ON(ret < 0); /* workqueues should not be signaled. */
+ if (rcu_cpu_stall_suppress)
+ continue;
+ panic_on_rcu_stall();
pr_err("INFO: %s detected expedited stalls on CPUs/tasks: {",
rsp->name);
ndetected = 0;
--
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