diff mbox series

[3/3] tracing/timerlat: Do not wakeup the thread if the trace stops at the IRQ

Message ID b392356c91b56aedd2b289513cc56a84cf87e60d.1652175637.git.bristot@kernel.org (mailing list archive)
State Accepted
Commit e502ce036acb645264fff4a9510fce0cd7f1f5e0
Headers show
Series [1/3] tracing/timerlat: Notify IRQ new max latency only if stop tracing is set | expand

Commit Message

Daniel Bristot de Oliveira May 10, 2022, 9:45 a.m. UTC 
There is no need to wakeup the timerlat/ thread if stop tracing is hit
at the timerlat's IRQ handler.

Return before waking up timerlat's thread.

Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@redhat.com>
Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org>
---
 kernel/trace/trace_osnoise.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/kernel/trace/trace_osnoise.c b/kernel/trace/trace_osnoise.c
index 9b204ee3c6f5..035ec8b84e12 100644
--- a/kernel/trace/trace_osnoise.c
+++ b/kernel/trace/trace_osnoise.c
@@ -1595,6 +1595,8 @@  static enum hrtimer_restart timerlat_irq(struct hrtimer *timer)
 
 			osnoise_stop_tracing();
 			notify_new_max_latency(diff);
+
+			return HRTIMER_NORESTART;
 		}
 	}