path: root/Documentation/trace
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authorMotohiro KOSAKI <kosaki.motohiro@jp.fujitsu.com>2010-01-18 21:35:12 -0500
committerIngo Molnar <mingo@elte.hu>2010-01-20 07:18:15 +0100
commitdf3ab708b787a2b35de5101452bd51d4a8ae0ded (patch)
tree926bb3c653770e5f47c1b44f4f4b9e7b3026b963 /Documentation/trace
parent580d9e00fdfb85e65c5097dcd739c6efcdbadc96 (diff)
kprobetrace, doc: Add the explanation to remove probe points
Latest kprobetrace can remove probe points selectively, thus the documentation should be updated too. Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: systemtap <systemtap@sources.redhat.com> Cc: DLE <dle-develop@lists.sourceforge.net> LKML-Reference: <20100119023512.31880.35535.stgit@localhost6.localdomain6> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'Documentation/trace')
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/trace/kprobetrace.txt b/Documentation/trace/kprobetrace.txt
index ab57f02e53b..a9100b28eb8 100644
--- a/Documentation/trace/kprobetrace.txt
+++ b/Documentation/trace/kprobetrace.txt
@@ -24,6 +24,7 @@ Synopsis of kprobe_events
p[:[GRP/]EVENT] SYMBOL[+offs]|MEMADDR [FETCHARGS] : Set a probe
r[:[GRP/]EVENT] SYMBOL[+0] [FETCHARGS] : Set a return probe
+ -:[GRP/]EVENT : Clear a probe
GRP : Group name. If omitted, use "kprobes" for it.
EVENT : Event name. If omitted, the event name is generated
@@ -122,6 +123,12 @@ REC->dfd, REC->filename, REC->flags, REC->mode
This clears all probe points.
+ Or,
+ echo -:myprobe >> kprobe_events
+ This clears probe points selectively.
Right after definition, each event is disabled by default. For tracing these
events, you need to enable it.