tracing: Add a per-event-trigger 'paused' field (104f2810) · Commits · 戴 / test

Add a simple per-trigger 'paused' flag, allowing individual triggers to pause. We could leave it to individual triggers that need this functionality to do it themselves, but we also want to allow other events to control pausing, so add it to the trigger data. Link: http://lkml.kernel.org/r/fed37e4879684d7dcc57fe00ce0cbf170032b06d.1449767187.git.tom.zanussi@linux.intel.com Signed-off-by:

kernel/trace/trace.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -1172,6 +1172,7 @@ struct event_trigger_data {
		struct event_filter __rcu *filter;
		char *filter_str;
		void *private_data;
		bool paused;
		struct list_head list;
		};

+4 −0

Original line number	Diff line number	Diff line
		@@ -72,6 +72,8 @@ event_triggers_call(struct trace_event_file file, void rec)
		return tt;

		list_for_each_entry_rcu(data, &file->triggers, list) {
		if (data->paused)
		continue;
		if (!rec) {
		data->ops->func(data, rec);
		continue;
		@@ -110,6 +112,8 @@ event_triggers_post_call(struct trace_event_file *file,
		struct event_trigger_data *data;

		list_for_each_entry_rcu(data, &file->triggers, list) {
		if (data->paused)
		continue;
		if (data->cmd_ops->trigger_type & tt)
		data->ops->func(data, rec);
		}