Re: [PATCH v12 0/3] tracing: Centralize preemptirq tracepoints and unify their usage

[Masami Hiramatsu]

On Thu, 2 Aug 2018 19:57:09 -0700
Joel Fernandes <joelaf@xxxxxxxxxx> wrote:

> Hi Masami,
> 
> On Thu, Aug 2, 2018 at 7:55 AM, Masami Hiramatsu <mhiramat@xxxxxxxxxx> wrote:
> > Hi Joel,
> >
> > I found this caused several issues when testing ftrace.
> >
> > #1) ftrace boottest (FTRACE_STARTUP_TEST) fails
> 
> This sadly appears to be a real issue. The startup test for
> "preemptirqsoff" tracer fails, however it passes for only preemptoff
> or only irqsoff. I tested only the last 2 tracers, not the first one,
> that's why I didn't catch it. I need to debug this more.

I found that this does not always happen, but 4 out of 5 it happens.

Thank you,

-- 
Masami Hiramatsu <mhiramat@xxxxxxxxxx>