Re: [PATCH v8 2/2] perf evsel: Find process with busy PMUs for EBUSY

[Arnaldo Carvalho de Melo <acme@kernel.org>]

On Tue, Jun 09, 2026 at 02:20:43PM -0300, Arnaldo Carvalho de Melo wrote:
> On Tue, Jun 09, 2026 at 08:58:03AM -0700, Ian Rogers wrote:
> > On Tue, Jun 2, 2026 at 11:13 AM Chun-Tse Shao <ctshao@google.com> wrote:
> > >
> > > It parses fdinfo with PMU type, comparing with the event which failed to
> > > open, and report the processes causing EBUSY error.
> > >
> > > Testing cycles and intel_pt//
> > >
> > >   $ ./perf stat -e cycles &
> > >   [1] 55569
> > >   $ ./perf stat -e intel_pt// &
> > >   [2] 55683
> > >   $ ./perf stat -e intel_pt//
> > >   Error:
> > >   The PMU intel_pt counters are busy and in use by another process.
> > >   Possible processes:
> > >   55683 ./perf stat -e intel_pt//
> > >
> > > Only perf with intel_pt was reported.
> > >
> > > Reviewed-by: Ian Rogers <irogers@google.com>
> > > Signed-off-by: Chun-Tse Shao <ctshao@google.com>
> > > Assisted-by: Gemini:gemini-3.1-pro-preview
> > 
> > Arnaldo, as the kernel piece of this landed (thanks Peter!) could we
> > land the tool part too?
> 
> Thanks for pointing this out to me, I'll do some housekeeping and
> process this.

I think this hasn't landed, I tried to find the userland part of v8 but
didn't manage to, can you please point it to me?

- Arnaldo