Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 489c75c3 authored by Jiri Olsa's avatar Jiri Olsa Committed by Steven Rostedt
Browse files

ftrace, perf: Add add/del tracepoint perf registration actions 

Adding TRACE_REG_PERF_ADD and TRACE_REG_PERF_DEL to handle
perf event schedule in/out actions.

The add action is invoked for when the perf event is scheduled in,
while the del action is invoked when the event is scheduled out.

Link: http://lkml.kernel.org/r/1329317514-8131-4-git-send-email-jolsa@redhat.com



Acked-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: default avatarJiri Olsa <jolsa@redhat.com>
Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
parent ceec0b6f

include/linux/ftrace_event.h

+2 −0
Original line number Diff line number Diff line
@@ -148,6 +148,8 @@ enum trace_reg { 
	TRACE_REG_PERF_UNREGISTER,

	TRACE_REG_PERF_OPEN,

	TRACE_REG_PERF_CLOSE,

	TRACE_REG_PERF_ADD,

	TRACE_REG_PERF_DEL,

};



struct ftrace_event_call;

kernel/trace/trace_event_perf.c

+3 −1
Original line number Diff line number Diff line
@@ -211,12 +211,14 @@ int perf_trace_add(struct perf_event *p_event, int flags) 
	list = this_cpu_ptr(pcpu_list);

	hlist_add_head_rcu(&p_event->hlist_entry, list);



	return 0;

	return tp_event->class->reg(tp_event, TRACE_REG_PERF_ADD, p_event);

}



void perf_trace_del(struct perf_event *p_event, int flags)

{

	struct ftrace_event_call *tp_event = p_event->tp_event;

	hlist_del_rcu(&p_event->hlist_entry);

	tp_event->class->reg(tp_event, TRACE_REG_PERF_DEL, p_event);

}



__kprobes void *perf_trace_buf_prepare(int size, unsigned short type,

kernel/trace/trace_events.c

+2 −0
Original line number Diff line number Diff line
@@ -173,6 +173,8 @@ int ftrace_event_reg(struct ftrace_event_call *call, 
		return 0;

	case TRACE_REG_PERF_OPEN:

	case TRACE_REG_PERF_CLOSE:

	case TRACE_REG_PERF_ADD:

	case TRACE_REG_PERF_DEL:

		return 0;

#endif

	}

kernel/trace/trace_kprobe.c

+2 −0
Original line number Diff line number Diff line
@@ -1912,6 +1912,8 @@ int kprobe_register(struct ftrace_event_call *event, 
		return 0;

	case TRACE_REG_PERF_OPEN:

	case TRACE_REG_PERF_CLOSE:

	case TRACE_REG_PERF_ADD:

	case TRACE_REG_PERF_DEL:

		return 0;

#endif

	}

kernel/trace/trace_syscalls.c

+4 −0
Original line number Diff line number Diff line
@@ -666,6 +666,8 @@ static int syscall_enter_register(struct ftrace_event_call *event, 
		return 0;

	case TRACE_REG_PERF_OPEN:

	case TRACE_REG_PERF_CLOSE:

	case TRACE_REG_PERF_ADD:

	case TRACE_REG_PERF_DEL:

		return 0;

#endif

	}
@@ -690,6 +692,8 @@ static int syscall_exit_register(struct ftrace_event_call *event, 
		return 0;

	case TRACE_REG_PERF_OPEN:

	case TRACE_REG_PERF_CLOSE:

	case TRACE_REG_PERF_ADD:

	case TRACE_REG_PERF_DEL:

		return 0;

#endif

	}