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Commit df3ab708 authored by Motohiro KOSAKI's avatar Motohiro KOSAKI Committed by Ingo Molnar
Browse files

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: default avatarKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: default avatarMasami 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: default avatarIngo Molnar <mingo@elte.hu>
parent 580d9e00

Documentation/trace/kprobetrace.txt

+7 −0
Original line number Diff line number Diff line
@@ -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.