Commit 4f5a7f40 authored Nov 27, 2008 by Lai Jiangshan Committed by Ingo Molnar Nov 27, 2008

ftrace: prevent recursion



Impact: prevent unnecessary stack recursion

if the resched flag was set before we entered, then don't reschedule.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent fb91ee6c

kernel/trace/ring_buffer.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1215,7 +1215,7 @@ ring_buffer_lock_reserve(struct ring_buffer *buffer,

		out:
		if (resched)
		preempt_enable_notrace();
		preempt_enable_no_resched_notrace();
		else
		preempt_enable_notrace();
		return NULL;