6.6-stable review patch. If anyone has any objections, please let me know.
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From: Tomas Glozar tglozar@redhat.com
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@vger.kernel.org Cc: John Kacur jkacur@redhat.com Cc: Luis Goncalves lgoncalv@redhat.com Cc: Gabriele Monaco gmonaco@redhat.com Link: https://lore.kernel.org/20250116144931.649593-2-tglozar@redhat.com Signed-off-by: Tomas Glozar tglozar@redhat.com Signed-off-by: Steven Rostedt (Google) rostedt@goodmis.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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);