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Diffstat (limited to 'Documentation/trace/events.rst')
| -rw-r--r-- | Documentation/trace/events.rst | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/Documentation/trace/events.rst b/Documentation/trace/events.rst index 759907c20e75..2d88a2acacc0 100644 --- a/Documentation/trace/events.rst +++ b/Documentation/trace/events.rst @@ -55,6 +55,30 @@ command:: # echo 'irq:*' > /sys/kernel/tracing/set_event +The set_event file may also be used to enable events associated to only +a specific module:: + + # echo ':mod:<module>' > /sys/kernel/tracing/set_event + +Will enable all events in the module ``<module>``. If the module is not yet +loaded, the string will be saved and when a module is that matches ``<module>`` +is loaded, then it will apply the enabling of events then. + +The text before ``:mod:`` will be parsed to specify specific events that the +module creates:: + + # echo '<match>:mod:<module>' > /sys/kernel/tracing/set_event + +The above will enable any system or event that ``<match>`` matches. If +``<match>`` is ``"*"`` then it will match all events. + +To enable only a specific event within a system:: + + # echo '<system>:<event>:mod:<module>' > /sys/kernel/tracing/set_event + +If ``<event>`` is ``"*"`` then it will match all events within the system +for a given module. + 2.2 Via the 'enable' toggle --------------------------- |