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Commit 52ad51e7 authored by GeunSik Lim's avatar GeunSik Lim Committed by Greg Kroah-Hartman
Browse files

debugfs: Fix mount directory of debugfs by default in events.txt 



We need common default directory of denbugfs for consistency.
(debugfs's default directory is /sys/kernel/debug/ by debugfs.)

Signed-off-by: default avatarGeunSik Lim <geunsik.lim@samsung.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 4a351471

Documentation/trace/events.txt

+12 −12
Original line number Diff line number Diff line
@@ -22,12 +22,12 @@ tracing information should be printed. 
---------------------------------



The events which are available for tracing can be found in the file

/debug/tracing/available_events.

/sys/kernel/debug/tracing/available_events.



To enable a particular event, such as 'sched_wakeup', simply echo it

to /debug/tracing/set_event. For example:

to /sys/kernel/debug/tracing/set_event. For example:



	# echo sched_wakeup >> /debug/tracing/set_event

	# echo sched_wakeup >> /sys/kernel/debug/tracing/set_event



[ Note: '>>' is necessary, otherwise it will firstly disable

  all the events. ]
@@ -35,15 +35,15 @@ to /debug/tracing/set_event. For example: 
To disable an event, echo the event name to the set_event file prefixed

with an exclamation point:



	# echo '!sched_wakeup' >> /debug/tracing/set_event

	# echo '!sched_wakeup' >> /sys/kernel/debug/tracing/set_event



To disable all events, echo an empty line to the set_event file:



	# echo > /debug/tracing/set_event

	# echo > /sys/kernel/debug/tracing/set_event



To enable all events, echo '*:*' or '*:' to the set_event file:



	# echo *:* > /debug/tracing/set_event

	# echo *:* > /sys/kernel/debug/tracing/set_event



The events are organized into subsystems, such as ext4, irq, sched,

etc., and a full event name looks like this: <subsystem>:<event>.  The
@@ -52,29 +52,29 @@ file. All of the events in a subsystem can be specified via the syntax 
"<subsystem>:*"; for example, to enable all irq events, you can use the

command:



	# echo 'irq:*' > /debug/tracing/set_event

	# echo 'irq:*' > /sys/kernel/debug/tracing/set_event



2.2 Via the 'enable' toggle

---------------------------



The events available are also listed in /debug/tracing/events/ hierarchy

The events available are also listed in /sys/kernel/debug/tracing/events/ hierarchy

of directories.



To enable event 'sched_wakeup':



	# echo 1 > /debug/tracing/events/sched/sched_wakeup/enable

	# echo 1 > /sys/kernel/debug/tracing/events/sched/sched_wakeup/enable



To disable it:



	# echo 0 > /debug/tracing/events/sched/sched_wakeup/enable

	# echo 0 > /sys/kernel/debug/tracing/events/sched/sched_wakeup/enable



To enable all events in sched subsystem:



	# echo 1 > /debug/tracing/events/sched/enable

	# echo 1 > /sys/kernel/debug/tracing/events/sched/enable



To eanble all events:



	# echo 1 > /debug/tracing/events/enable

	# echo 1 > /sys/kernel/debug/tracing/events/enable



When reading one of these enable files, there are four results: