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 teh expedited code to respond to these controls.
Signed-off-by: Paul E. McKenney <[email protected]> --- 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 3a647eb96f23..f316683b18f1 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; -- 2.5.2
