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kprobetrace, doc: Add the explanation to remove probe points

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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>
This commit is contained in:
Motohiro KOSAKI
2010-01-18 21:35:12 -05:00
committed by Ingo Molnar
parent 580d9e00fd
commit df3ab708b7
1 changed files with 7 additions and 0 deletions
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7
Documentation/trace/kprobetrace.txt
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@@ -24,6 +24,7 @@ Synopsis of kprobe_events
------------------------- -------------------------
p[:[GRP/]EVENT] SYMBOL[+offs]|MEMADDR [FETCHARGS] : Set a probe p[:[GRP/]EVENT] SYMBOL[+offs]|MEMADDR [FETCHARGS] : Set a probe
r[:[GRP/]EVENT] SYMBOL[+0] [FETCHARGS] : Set a return 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. GRP : Group name. If omitted, use "kprobes" for it.
EVENT : Event name. If omitted, the event name is generated 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. 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 Right after definition, each event is disabled by default. For tracing these
events, you need to enable it. events, you need to enable it.