Hi,
On Wed, Nov 18, 2020 at 09:52:18AM -0800, Paul E. McKenney wrote:
> Hello, Frederic,
>
> Here is the last few months' pile of warnings from rcutorture runs.
>
> Thanx, Paul
>
> [ 255.098527] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #282!!!
> [ 414.534548] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #80!!!
> [ 3798.654736] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #80!!!
> [ 1718.589367] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #80!!!
> [ 6632.777655] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #80!!!
> [ 2873.688490] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #80!!!
> [ 3081.738937] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #80!!!
> [ 2673.597523] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #80!!!
> [ 1467.372887] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #80!!!
> [ 34.371094] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #80!!!
> [ 1147.260097] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #80!!!
> [ 5066.699589] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #80!!!
> [ 816.338843] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #80!!!
> [ 34.338836] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #80!!!
> [ 1234.111394] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #280!!!
> [ 1282.109415] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #280!!!
> [ 239.215890] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #280!!!
> [ 367.918969] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #202!!!
> [ 1461.037894] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #80!!!
> [ 1503.810903] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #280!!!
> [ 1503.811939] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #280!!!
> [ 699.514824] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #202!!!
> [ 751.681629] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #280!!!
> [ 287.770126] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #202!!!
> [ 287.771096] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #202!!!
> [ 648.009370] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #80!!!
> [ 924.733405] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #202!!!
> [ 924.734011] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #202!!!
> [ 1743.197353] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #02!!!
> [ 1528.161635] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #280!!!
> [ 1528.162313] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #280!!!
> [ 265.201513] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #280!!!
> [ 473.137587] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #202!!!
> [ 187.375426] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #280!!!
> [ 1361.544451] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #80!!!
> [ 79.519727] NOHZ tick-stop error: Non-RCU local softirq work is pending,
> handler #280!!!
Would you be willing to run TREE05 for me until it triggers the issue with:
trace_event=softirq_raise trace_options=stacktrace
And with the below patch, thanks! (make sure you have CONFIG_EVENT_TRACING=y)
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 81632cd5e3b7..1751e2d9a5b5 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -929,6 +929,8 @@ static bool can_stop_idle_tick(int cpu, struct tick_sched
*ts)
(local_softirq_pending() & SOFTIRQ_STOP_IDLE_MASK)) {
pr_warn("NOHZ tick-stop error: Non-RCU local softirq
work is pending, handler #%02x!!!\n",
(unsigned int) local_softirq_pending());
+ dump_stack();
+ ftrace_dump(DUMP_ORIG);
ratelimit++;
}
return false;
