This is a note to let you know that I've just added the patch titled
perf tests: Apply attributes to all events in object code reading test
to the 6.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
perf-tests-apply-attributes-to-all-events-in-object-.patch
and it can be found in the queue-6.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 23b3648c2aa2c1084242ce36ed91eb828a4f5155
Author: James Clark <james.clark@xxxxxxx>
Date: Wed Apr 10 11:34:53 2024 +0100
perf tests: Apply attributes to all events in object code reading test
[ Upstream commit 2dade41a533f337447b945239b87ff31a8857890 ]
PERF_PMU_CAP_EXTENDED_HW_TYPE results in multiple events being opened on
heterogeneous systems. Currently this test only sets its required
attributes on the first event. Not disabling enable_on_exec on the other
events causes the test to fail because the forked objdump processes are
sampled. No tracking event is opened so Perf only knows about its own
mappings causing the objdump samples to give the following error:
$ perf test -vvv "object code reading"
Reading object code for memory address: 0xffff9aaa55ec
thread__find_map failed
---- end(-1) ----
24: Object code reading : FAILED!
Fixes: 251aa040244a3b17 ("perf parse-events: Wildcard most "numeric" events")
Reviewed-by: Ian Rogers <irogers@xxxxxxxxxx>
Signed-off-by: James Clark <james.clark@xxxxxxx>
Acked-by: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Athira Rajeev <atrajeev@xxxxxxxxxxxxxxxxxx>
Cc: Ian Rogers <irogers@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
Cc: Leo Yan <leo.yan@xxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Spoorthy S <spoorts2@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20240410103458.813656-3-james.clark@xxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/tools/perf/tests/code-reading.c b/tools/perf/tests/code-reading.c
index 7a3a7bbbec714..29d2f3ee4e10f 100644
--- a/tools/perf/tests/code-reading.c
+++ b/tools/perf/tests/code-reading.c
@@ -637,11 +637,11 @@ static int do_test_code_reading(bool try_kcore)
evlist__config(evlist, &opts, NULL);
- evsel = evlist__first(evlist);
-
- evsel->core.attr.comm = 1;
- evsel->core.attr.disabled = 1;
- evsel->core.attr.enable_on_exec = 0;
+ evlist__for_each_entry(evlist, evsel) {
+ evsel->core.attr.comm = 1;
+ evsel->core.attr.disabled = 1;
+ evsel->core.attr.enable_on_exec = 0;
+ }
ret = evlist__open(evlist);
if (ret < 0) {
