Re: [PATCH 6.19 027/844] perf metricgroup: Don't early exit if no CPUID table exists

[Ian Rogers]

On Mon, Mar 9, 2026 at 6:40 AM Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
>
> On Mon, Mar 09, 2026 at 08:40:33AM +0100, Jiri Slaby wrote:
> > On 28. 02. 26, 18:19, Sasha Levin wrote:
> > > From: Ian Rogers <irogers@xxxxxxxxxx>
> > >
> > > [ Upstream commit cee275edcdb1acfdc8270f80e96f30750b633220 ]
> >
> > This breaks (userspace) perf:
> > $ ./perf stat -a -d -p 1 sleep 5
> > PID/TID switch overriding SYSTEM
> > Error:
> > No supported events found.
> >
> > Any ideas?
>
> Is it also broken in 7.0-rc3?  Or is this only a 6.19.y issue?

There was a fix:
https://web.git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools-next.git/commit/tools/perf/util/metricgroup.c?h=perf-tools-next&id=c5a244bf17caf2de22f9e100832b75f72b31d3e6
was that applied to 6.19.y?

Thanks,
Ian