From: Adrian Hunter <adrian.hunter@xxxxxxxxx>
commit 6cef7dab3e2e5cb23a13569c3880c0532326748c upstream.
User space tasks can migrate between CPUs, so when tracing selected CPUs,
system-wide sideband is still needed, however evlist->core.has_user_cpus
is not set in the hybrid case, so check the target cpu_list instead.
Fixes: 7d189cadbeebc778 ("perf intel-pt: Track sideband system-wide when needed")
Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Acked-by: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Ian Rogers <irogers@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Link: https://lore.kernel.org/r/20221012082259.22394-3-adrian.hunter@xxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
tools/perf/arch/x86/util/intel-pt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/tools/perf/arch/x86/util/intel-pt.c
+++ b/tools/perf/arch/x86/util/intel-pt.c
@@ -871,7 +871,7 @@ static int intel_pt_recording_options(st
* User space tasks can migrate between CPUs, so when tracing
* selected CPUs, sideband for all CPUs is still needed.
*/
- need_system_wide_tracking = evlist->core.has_user_cpus &&
+ need_system_wide_tracking = opts->target.cpu_list &&
!intel_pt_evsel->core.attr.exclude_user;
tracking_evsel = evlist__add_aux_dummy(evlist, need_system_wide_tracking);
