[PATCH -tip 2/2] kprobetrace,doc: Add the explanation to remove probe points

From: Masami Hiramatsu
Date: Mon Jan 18 2010 - 21:34:45 EST

From: Motohiro KOSAKI <kosaki.motohiro@xxxxxxxxxxxxxx>

Latest kprobetrace can remove probe points selectively. thus
documentation should be updated too.

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Acked-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx>

Documentation/trace/kprobetrace.txt | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/Documentation/trace/kprobetrace.txt b/Documentation/trace/kprobetrace.txt
index ab57f02..a9100b2 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.

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