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During the merge window I added a new file that is used to filter trace

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events on pids. It filters all events where only tasks with their pid in that
 file exists. It also handles the sched_switch and sched_wakeup trace events
 where the current task does not have its pid in the file, but the task
 either being switched to or awaken does.
 
 Unfortunately, I forgot about sched_wakeup_new and sched_waking. Both of
 these tracepoints use the same class as the sched_wakeup tracepoint, and
 they too should be included in what gets filtered by the set_event_pid file.
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Merge tag 'trace-v4.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing fix from Steven Rostedt:
 "During the merge window I added a new file that is used to filter
  trace events on pids.  It filters all events where only tasks with
  their pid in that file exists.  It also handles the sched_switch and
  sched_wakeup trace events where the current task does not have its pid
  in the file, but the task either being switched to or awaken does.

  Unfortunately, I forgot about sched_wakeup_new and sched_waking.  Both
  of these tracepoints use the same class as the sched_wakeup
  tracepoint, and they too should be included in what gets filtered by
  the set_event_pid file"

* tag 'trace-v4.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing: Add sched_wakeup_new and sched_waking tracepoints for pid filter
This commit is contained in:
Linus Torvalds 2015-12-03 15:23:17 -08:00
commit c041f08738
1 changed files with 16 additions and 0 deletions
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16
kernel/trace/trace_events.c
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@ -582,6 +582,12 @@ static void __ftrace_clear_event_pids(struct trace_array *tr)
unregister_trace_sched_wakeup(event_filter_pid_sched_wakeup_probe_pre, tr);
unregister_trace_sched_wakeup(event_filter_pid_sched_wakeup_probe_post, tr);
unregister_trace_sched_wakeup_new(event_filter_pid_sched_wakeup_probe_pre, tr);
unregister_trace_sched_wakeup_new(event_filter_pid_sched_wakeup_probe_post, tr);
unregister_trace_sched_waking(event_filter_pid_sched_wakeup_probe_pre, tr);
unregister_trace_sched_waking(event_filter_pid_sched_wakeup_probe_post, tr);
list_for_each_entry(file, &tr->events, list) {
clear_bit(EVENT_FILE_FL_PID_FILTER_BIT, &file->flags);
}
@ -1729,6 +1735,16 @@ ftrace_event_pid_write(struct file *filp, const char __user *ubuf,
tr, INT_MAX);
register_trace_prio_sched_wakeup(event_filter_pid_sched_wakeup_probe_post,
tr, 0);
register_trace_prio_sched_wakeup_new(event_filter_pid_sched_wakeup_probe_pre,
tr, INT_MAX);
register_trace_prio_sched_wakeup_new(event_filter_pid_sched_wakeup_probe_post,
tr, 0);
register_trace_prio_sched_waking(event_filter_pid_sched_wakeup_probe_pre,
tr, INT_MAX);
register_trace_prio_sched_waking(event_filter_pid_sched_wakeup_probe_post,
tr, 0);
}
/*