From: Tomas Glozar <tglozar@xxxxxxxxxx> commit e879b5dcf8d044f3865a32d95cc5b213f314c54f upstream. Support not only turning trace on for the timerlat tracer, but also turning it off. This will be used in subsequent patches to stop the timerlat tracer without also wiping the trace buffer. Cc: stable@xxxxxxxxxxxxxxx Cc: John Kacur <jkacur@xxxxxxxxxx> Cc: Luis Goncalves <lgoncalv@xxxxxxxxxx> Cc: Gabriele Monaco <gmonaco@xxxxxxxxxx> Link: https://lore.kernel.org/20250116144931.649593-2-tglozar@xxxxxxxxxx Signed-off-by: Tomas Glozar <tglozar@xxxxxxxxxx> Signed-off-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- tools/tracing/rtla/src/trace.c | 8 ++++++++ tools/tracing/rtla/src/trace.h | 1 + 2 files changed, 9 insertions(+) --- a/tools/tracing/rtla/src/trace.c +++ b/tools/tracing/rtla/src/trace.c @@ -197,6 +197,14 @@ int trace_instance_start(struct trace_in } /* + * trace_instance_stop - stop tracing a given rtla instance + */ +int trace_instance_stop(struct trace_instance *trace) +{ + return tracefs_trace_off(trace->inst); +} + +/* * trace_events_free - free a list of trace events */ static void trace_events_free(struct trace_events *events) --- a/tools/tracing/rtla/src/trace.h +++ b/tools/tracing/rtla/src/trace.h @@ -21,6 +21,7 @@ struct trace_instance { int trace_instance_init(struct trace_instance *trace, char *tool_name); int trace_instance_start(struct trace_instance *trace); +int trace_instance_stop(struct trace_instance *trace); void trace_instance_destroy(struct trace_instance *trace); struct trace_seq *get_trace_seq(void); Patches currently in stable-queue which might be from tglozar@xxxxxxxxxx are queue-6.13/tracing-osnoise-fix-resetting-of-tracepoints.patch queue-6.13/rtla-timerlat_top-set-osnoise_workload-for-kernel-threads.patch queue-6.13/rtla-osnoise-distinguish-missing-workload-option.patch queue-6.13/rtla-timerlat_hist-set-osnoise_workload-for-kernel-threads.patch queue-6.13/rtla-timerlat_top-stop-timerlat-tracer-on-signal.patch queue-6.13/rtla-timerlat_hist-stop-timerlat-tracer-on-signal.patch queue-6.13/rtla-add-trace_instance_stop.patch
