[PATCH v1 1/2] perf pmu: Make pmu_alias_terms weak again

From: Ian Rogers

Date: Wed Oct 29 2025 - 18:26:49 EST


The terms for a json event should be weak so they don't override
command line options.

Fixes: 84bae3af20d0 ("perf pmu: Don't eagerly parse event terms")
Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
---
tools/perf/util/pmu.c | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index d597263fab4f..f14f2a12d061 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -802,6 +802,7 @@ static int pmu_aliases_parse_eager(struct perf_pmu *pmu, int sysfs_fd)
static int pmu_alias_terms(struct perf_pmu_alias *alias, struct list_head *terms)
{
struct parse_events_terms alias_terms;
+ struct parse_events_term *term;
int ret;

parse_events_terms__init(&alias_terms);
@@ -812,6 +813,13 @@ static int pmu_alias_terms(struct perf_pmu_alias *alias, struct list_head *terms
parse_events_terms__exit(&alias_terms);
return ret;
}
+ list_for_each_entry(term, &alias_terms.terms, list) {
+ /*
+ * Weak terms don't override command line options,
+ * which we don't want for implicit terms in aliases.
+ */
+ term->weak = true;
+ }
list_splice_init(&alias_terms.terms, terms);
parse_events_terms__exit(&alias_terms);
return 0;
--
2.51.1.851.g4ebd6896fd-goog