[PATCH 2/2 v3] tracing/uprobes: Support soft-mode disabling

[zhangwei(Jovi)]

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>
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 dbbb4a9..d2da3ea 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,
 						call->event.type,
-- 
1.7.9.7


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/