Re: [PATCH] perf evsel: Improve callchain warning for s390

[Arnaldo Carvalho de Melo]

On Thu, Sep 24, 2026 at 11:40:11AM +0200, Thomas Richter wrote:
> On 9/23/26 18:37, Ian Rogers wrote:
> > On Tue, Sep 22, 2026 at 7:43 AM Jens Remus <jremus@xxxxxxxxxxxxx> wrote:
> >> On s390 the kernel uses s390 back chain instead of frame pointers for
> >> stack tracing of user space since v6.7 commit aa44433ac4ee ("s390: add
> >> USER_STACKTRACE support").  This is because frame pointers on s390
> >> cannot be used for stack tracing. [1]
<SNIP>
> >> Fixes: ca76fb67ebdd ("perf evlist: Improve default event for s390")
> >> Signed-off-by: Jens Remus <jremus@xxxxxxxxxxxxx>

> > Acked-by: Ian Rogers <irogers@xxxxxxxxxx>

> Reviewed-by: Thomas Richter <tmricht@xxxxxxxxxxxxx>

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

- Arnaldo