Re: [PATCH 2/2 v6] tracing/uprobes: Support soft-mode disabling
From: Masami Hiramatsu
Date: Thu Jul 04 2013 - 08:56:51 EST
(2013年07月04日 20:04), zhangwei(Jovi) wrote:
>
Support soft-mode disabling on uprobe-based dynamic events.
>
Soft-disabling is just ignoring recording if the soft disabled
>
flag is set.
>
>
Signed-off-by: zhangwei(Jovi) <jovi.zhangwe@xxxxxxxxxx>
looks good for me too.
Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@xxxxxxxxxxx>
Thanks!
>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@xxxxxxxxxxx>
>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
>
Cc: Srikar Dronamraju <srikar@xxxxxxxxxxxxxxxxxx>
>
---
>
kernel/trace/trace_uprobe.c | 3 +++
>
1 file changed, 3 insertions(+)
>
>
diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c
>
index 2fc9931..94f180d 100644
>
--- a/kernel/trace/trace_uprobe.c
>
+++ b/kernel/trace/trace_uprobe.c
>
@@ -530,6 +530,9 @@ static void uprobe_trace_print(struct trace_uprobe *tu,
>
>
WARN_ON(call != ftrace_file->event_call);
>
>
+ if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT, &ftrace_file->flags))
>
+ return;
>
+
>
size = SIZEOF_TRACE_ENTRY(is_ret_probe(tu));
>
event = trace_event_buffer_lock_reserve(&buffer, ftrace_file,
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call->event.type,
>
--
Masami HIRAMATSU
IT Management Research Dept. Linux Technology Center
Hitachi, Ltd., Yokohama Research Laboratory
E-mail: masami.hiramatsu.pt@xxxxxxxxxxx
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