diff options
| author | Daniel Bristot de Oliveira | 2023-03-29 17:50:16 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2023-04-13 16:55:34 +0200 |
| commit | 1ea5f8d1facd710c8be4bca5fca9808d8bc947d1 (patch) | |
| tree | 64270dbdb10964e0379389739ad7a2db4a225881 /kernel | |
| parent | 162e6e6ff25f0d9225a26369be9faa6c244918e3 (diff) | |
tracing/osnoise: Fix notify new tracing_max_latency
commit d3cba7f02cd82118c32651c73374d8a5a459d9a6 upstream.
osnoise/timerlat tracers are reporting new max latency on instances
where the tracing is off, creating inconsistencies between the max
reported values in the trace and in the tracing_max_latency. Thus
only report new tracing_max_latency on active tracing instances.
Link: https://lkml.kernel.org/r/ecd109fde4a0c24ab0f00ba1e9a144ac19a91322.1680104184.git.bristot@kernel.org
Cc: stable@vger.kernel.org
Fixes: dae181349f1e ("tracing/osnoise: Support a list of trace_array *tr")
Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/trace_osnoise.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/trace/trace_osnoise.c b/kernel/trace/trace_osnoise.c index 3b0c0bd63605..689361097bb0 100644 --- a/kernel/trace/trace_osnoise.c +++ b/kernel/trace/trace_osnoise.c @@ -1270,7 +1270,7 @@ static void notify_new_max_latency(u64 latency) rcu_read_lock(); list_for_each_entry_rcu(inst, &osnoise_instances, list) { tr = inst->tr; - if (tr->max_latency < latency) { + if (tracer_tracing_is_on(tr) && tr->max_latency < latency) { tr->max_latency = latency; latency_fsnotify(tr); } |