6.18-stable review patch. If anyone has any objections, please let me know.
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From: Namhyung Kim namhyung@kernel.org
[ Upstream commit 367377f45c0b568882567f797b7b18b263505be7 ]
It should also have PERF_SAMPLE_TID to enable inherit and PERF_SAMPLE_READ on recent kernels. Not having _TID makes the feature check wrongly detect the inherit and _READ support.
It was reported that the following command failed due to the error in the missing feature check on Intel SPR machines.
$ perf record -e '{cpu/mem-loads-aux/S,cpu/mem-loads,ldlat=3/PS}' -- ls Error: Failure to open event 'cpu/mem-loads,ldlat=3/PS' on PMU 'cpu' which will be removed. Invalid event (cpu/mem-loads,ldlat=3/PS) in per-thread mode, enable system wide with '-a'.
Reviewed-by: Ian Rogers irogers@google.com Fixes: 3b193a57baf15c468 ("perf tools: Detect missing kernel features properly") Reported-and-tested-by: Chen, Zide zide.chen@intel.com Closes: https://lore.kernel.org/lkml/20251022220802.1335131-1-zide.chen@intel.com/ Signed-off-by: Namhyung Kim namhyung@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- tools/perf/util/evsel.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 56ebefd075f2e..9df9818e37013 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -2473,7 +2473,7 @@ static bool evsel__detect_missing_features(struct evsel *evsel, struct perf_cpu /* Please add new feature detection here. */
attr.inherit = true; - attr.sample_type = PERF_SAMPLE_READ; + attr.sample_type = PERF_SAMPLE_READ | PERF_SAMPLE_TID; if (has_attr_feature(&attr, /*flags=*/0)) goto found; perf_missing_features.inherit_sample_read = true;