Re: [PATCH v2] perf ftrace latency: Do not read trace files when BPF is used

[Arnaldo Carvalho de Melo]

On Fri, Sep 04, 2026 at 10:36:08AM -0700, Ian Rogers wrote:
> On Sun, Aug 30, 2026 at 11:39 PM Namhyung Kim <namhyung@xxxxxxxxxx> wrote:
> >
> > I've realized that it didn't set up the tracing files when BPF is used
> > so poll() just returns immediately.  It ends up with calling poll()
> > unnecessarily in a loop.
> >
> > BPF still needs the loop to wait for the target process exiting or a
> > signal from users.  Let's use a semaphore instead.
> >
> > Suggested-by: Ian Rogers <irogers@xxxxxxxxxx>
> > Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
> > Cc: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
> > Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
> 
> Reviewed-by: Ian Rogers <irogers@xxxxxxxxxx>

Thanks, applied to perf-tools-next, for v7.4.

- Arnaldo