Messages in this thread Patch in this message | | | From | Tom Zanussi <> | Subject | [PATCH v3 4/7] tracing: Add a per-event-trigger 'paused' field | Date | Fri, 3 Apr 2015 10:51:14 -0500 |
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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.
Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com> --- kernel/trace/trace.h | 1 + kernel/trace/trace_events_trigger.c | 4 ++++ 2 files changed, 5 insertions(+)
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 3d38c2e..5bc1752 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -1110,6 +1110,7 @@ struct event_trigger_data { struct event_filter __rcu *filter; char *filter_str; void *private_data; + bool paused; struct list_head list; }; diff --git a/kernel/trace/trace_events_trigger.c b/kernel/trace/trace_events_trigger.c index a8dfd4e..010ce30 100644 --- a/kernel/trace/trace_events_trigger.c +++ b/kernel/trace/trace_events_trigger.c @@ -73,6 +73,8 @@ event_triggers_call(struct ftrace_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 ftrace_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); } -- 1.9.3
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