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-rw-r--r--Documentation/trace/events.txt11
1 files changed, 6 insertions, 5 deletions
diff --git a/Documentation/trace/events.txt b/Documentation/trace/events.txt
index 02ac6ed38b2..09bd8e90298 100644
--- a/Documentation/trace/events.txt
+++ b/Documentation/trace/events.txt
@@ -90,7 +90,8 @@ In order to facilitate early boot debugging, use boot option:
trace_event=[event-list]
-The format of this boot option is the same as described in section 2.1.
+event-list is a comma separated list of events. See section 2.1 for event
+format.
3. Defining an event-enabled tracepoint
=======================================
@@ -238,7 +239,7 @@ subsystem's filter file.
For convenience, filters for every event in a subsystem can be set or
cleared as a group by writing a filter expression into the filter file
-at the root of the subsytem. Note however, that if a filter for any
+at the root of the subsystem. Note however, that if a filter for any
event within the subsystem lacks a field specified in the subsystem
filter, or if the filter can't be applied for any other reason, the
filter for that event will retain its previous setting. This can
@@ -250,7 +251,7 @@ fields can be guaranteed to propagate successfully to all events.
Here are a few subsystem filter examples that also illustrate the
above points:
-Clear the filters on all events in the sched subsytem:
+Clear the filters on all events in the sched subsystem:
# cd /sys/kernel/debug/tracing/events/sched
# echo 0 > filter
@@ -260,7 +261,7 @@ none
none
Set a filter using only common fields for all events in the sched
-subsytem (all events end up with the same filter):
+subsystem (all events end up with the same filter):
# cd /sys/kernel/debug/tracing/events/sched
# echo common_pid == 0 > filter
@@ -270,7 +271,7 @@ common_pid == 0
common_pid == 0
Attempt to set a filter using a non-common field for all events in the
-sched subsytem (all events but those that have a prev_pid field retain
+sched subsystem (all events but those that have a prev_pid field retain
their old filters):
# cd /sys/kernel/debug/tracing/events/sched