diff options
| author | Paul E. McKenney <[email protected]> | 2022-05-24 16:05:15 -0700 |
|---|---|---|
| committer | Paul E. McKenney <[email protected]> | 2022-06-20 09:22:28 -0700 |
| commit | 9f3eb5fb8e468d3c3a6073d0c816405fa73c8038 (patch) | |
| tree | 50f0afe0057fbaef9154ca6ef20f4334c0084c6c | |
| parent | 0968e8920b5b11b7a33982890ad9150e09e1cb1f (diff) | |
rcu-tasks: Add slow-IPI indicator to RCU Tasks Trace stall warnings
This commit adds a "I" indicator to the RCU Tasks Trace CPU stall
warning when an IPI directed to a task has thus far failed to arrive.
This serves as a debugging aid.
Signed-off-by: Paul E. McKenney <[email protected]>
Cc: Neeraj Upadhyay <[email protected]>
Cc: Eric Dumazet <[email protected]>
Cc: Alexei Starovoitov <[email protected]>
Cc: Andrii Nakryiko <[email protected]>
Cc: Martin KaFai Lau <[email protected]>
Cc: KP Singh <[email protected]>
| -rw-r--r-- | kernel/rcu/tasks.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/rcu/tasks.h b/kernel/rcu/tasks.h index 6b44c69eeca8..1cfbebf2b597 100644 --- a/kernel/rcu/tasks.h +++ b/kernel/rcu/tasks.h @@ -1497,8 +1497,9 @@ static void show_stalled_task_trace(struct task_struct *t, bool *firstreport) } cpu = task_cpu(t); if (!task_call_func(t, trc_check_slow_task, &trc_rdr)) - pr_alert("P%d: %c\n", + pr_alert("P%d: %c%c\n", t->pid, + ".I"[t->trc_ipi_to_cpu >= 0], ".i"[is_idle_tsk]); else pr_alert("P%d: %c%c%c nesting: %d%c cpu: %d\n", |