On Wed, 13 Jan 2016 11:24:56 -0500
Steven Rostedt <rostedt@xxxxxxxxxxx> wrote:
> On Tue, 12 Jan 2016 15:46:15 -0800
> Brendan Gregg <brendan.d.gregg@xxxxxxxxx> wrote:
>
> > Just noticed the stacktrace option isn't working for me on Linux 4.4.
> > Not sure when it last worked, or why it stopped (could be my build).
>
> Thanks for the report. I'm looking into it.
Looks like I had a cut and paste bug, and changed a 0 to a 6 where I
shouldn't have.
Does this patch fix the issue for you?
-- Steve
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 87fb9801bd9e..d9293402ee68 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -1751,7 +1751,7 @@ void trace_buffer_unlock_commit_regs(struct trace_array *tr,
{
__buffer_unlock_commit(buffer, event);
- ftrace_trace_stack(tr, buffer, flags, 6, pc, regs);
+ ftrace_trace_stack(tr, buffer, flags, 0, pc, regs);
ftrace_trace_userstack(buffer, flags, pc);
}
EXPORT_SYMBOL_GPL(trace_buffer_unlock_commit_regs);
--
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