This is a note to let you know that I've just added the patch titled
tracing/timerlat: Notify new max thread latency
to the 6.2-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
tracing-timerlat-notify-new-max-thread-latency.patch
and it can be found in the queue-6.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From b9f451a9029a16eb7913ace09b92493d00f2e564 Mon Sep 17 00:00:00 2001
From: Daniel Bristot de Oliveira <bristot@xxxxxxxxxx>
Date: Wed, 29 Mar 2023 17:50:15 +0200
Subject: tracing/timerlat: Notify new max thread latency
From: Daniel Bristot de Oliveira <bristot@xxxxxxxxxx>
commit b9f451a9029a16eb7913ace09b92493d00f2e564 upstream.
timerlat is not reporting a new tracing_max_latency for the thread
latency. The reason is that it is not calling notify_new_max_latency()
function after the new thread latency is sampled.
Call notify_new_max_latency() after computing the thread latency.
Link: https://lkml.kernel.org/r/16e18d61d69073d0192ace07bf61e405cca96e9c.1680104184.git.bristot@xxxxxxxxxx
Cc: stable@xxxxxxxxxxxxxxx
Fixes: dae181349f1e ("tracing/osnoise: Support a list of trace_array *tr")
Signed-off-by: Daniel Bristot de Oliveira <bristot@xxxxxxxxxx>
Signed-off-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
kernel/trace/trace_osnoise.c | 2 ++
1 file changed, 2 insertions(+)
--- a/kernel/trace/trace_osnoise.c
+++ b/kernel/trace/trace_osnoise.c
@@ -1738,6 +1738,8 @@ static int timerlat_main(void *data)
trace_timerlat_sample(&s);
+ notify_new_max_latency(diff);
+
timerlat_dump_stack(time_to_us(diff));
tlat->tracing_thread = false;
Patches currently in stable-queue which might be from bristot@xxxxxxxxxx are
queue-6.2/tracing-osnoise-fix-notify-new-tracing_max_latency.patch
queue-6.2/tracing-timerlat-notify-new-max-thread-latency.patch
