tracing: add event trace infrastructure
authorSteven Rostedt <srostedt@redhat.com>
Tue, 24 Feb 2009 15:21:36 +0000 (10:21 -0500)
committerSteven Rostedt <srostedt@redhat.com>
Wed, 25 Feb 2009 02:54:05 +0000 (21:54 -0500)
commitb77e38aa240c3bd9c55c98b9f7c81541e042eae5
treebbb40993e76edc52d2cae1040b941ba4e4d2f965
parent7c37730cd31ddb2d3a1da142af9b18c29b8c433b
tracing: add event trace infrastructure

This patch creates the event tracing infrastructure of ftrace.
It will create the files:

 /debug/tracing/available_events
 /debug/tracing/set_event

The available_events will list the trace points that have been
registered with the event tracer.

set_events will allow the user to enable or disable an event hook.

example:

 # echo sched_wakeup > /debug/tracing/set_event

Will enable the sched_wakeup event (if it is registered).

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

Will disable the sched_wakeup event (and only that event).

 # echo > /debug/tracing/set_event

Will disable all events (notice the '>')

 # cat /debug/tracing/available_events > /debug/tracing/set_event

Will enable all registered event hooks.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
include/asm-generic/vmlinux.lds.h
kernel/trace/Kconfig
kernel/trace/Makefile
kernel/trace/trace_events.c [new file with mode: 0644]
kernel/trace/trace_events.h [new file with mode: 0644]