On Wed, Jan 13, 2016 at 12:38 PM, Steven Rostedt <rostedt@xxxxxxxxxxx> wrote:
> 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?
>
Yes, tested, this patch fixes it. Thanks!
Brendan
> -- 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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