This is a note to let you know that I've just added the patch titled
perf test bpf: Skip test if kernel-debuginfo is not present
to the 6.1-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-test-bpf-skip-test-if-kernel-debuginfo-is-not-p.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit a398defc4c1e86e5935c5fc398aa11171b814133
Author: Athira Rajeev <atrajeev@xxxxxxxxxxxxxxxxxx>
Date: Thu Jan 5 17:47:42 2023 +0530
perf test bpf: Skip test if kernel-debuginfo is not present
[ Upstream commit 34266f904abd45731bdade2e92d0536c092ee9bc ]
Perf BPF filter test fails in environment where "kernel-debuginfo"
is not installed.
Test failure logs:
<<>>
42: BPF filter :
42.1: Basic BPF filtering : Ok
42.2: BPF pinning : Ok
42.3: BPF prologue generation : FAILED!
<<>>
Enabling verbose option provided debug logs, which says debuginfo
needs to be installed. Snippet of verbose logs:
<<>>
42.3: BPF prologue generation :
--- start ---
test child forked, pid 28218
<<>>
Rebuild with CONFIG_DEBUG_INFO=y, or install an appropriate debuginfo
package.
bpf_probe: failed to convert perf probe events
Failed to add events selected by BPF
test child finished with -1
---- end ----
BPF filter subtest 3: FAILED!
<<>>
Here the subtest "BPF prologue generation" failed and logs shows
debuginfo is needed. After installing kernel-debuginfo package, testcase
passes.
The "BPF prologue generation" subtest failed because, the do_test()
returns TEST_FAIL without checking the error type returned by
parse_events_load_bpf_obj().
parse_events_load_bpf_obj() can also return error of type -ENODATA
incase kernel-debuginfo package is not installed. Fix this by adding
check for -ENODATA error.
Test result after the patch changes:
Test failure logs:
<<>>
42: BPF filter :
42.1: Basic BPF filtering : Ok
42.2: BPF pinning : Ok
42.3: BPF prologue generation : Skip (clang/debuginfo isn't installed or environment missing BPF support)
<<>>
Fixes: ba1fae431e74bb42 ("perf test: Add 'perf test BPF'")
Signed-off-by: Athira Rajeev <atrajeev@xxxxxxxxxxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: Disha Goel <disgoel@xxxxxxxxxxxxx>
Cc: Ian Rogers <irogers@xxxxxxxxxx>
Cc: James Clark <james.clark@xxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Kajol Jain <kjain@xxxxxxxxxxxxx>
Cc: Madhavan Srinivasan <maddy@xxxxxxxxxxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Nageswara R Sastry <rnsastry@xxxxxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Wang Nan <wangnan0@xxxxxxxxxx>
Cc: linuxppc-dev@xxxxxxxxxxxxxxxx
Link: http://lore.kernel.org/linux-perf-users/Y7bIk77mdE4j8Jyi@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/tools/perf/tests/bpf.c b/tools/perf/tests/bpf.c
index 17c023823713d..6a4235a9cf57e 100644
--- a/tools/perf/tests/bpf.c
+++ b/tools/perf/tests/bpf.c
@@ -126,6 +126,10 @@ static int do_test(struct bpf_object *obj, int (*func)(void),
err = parse_events_load_bpf_obj(&parse_state, &parse_state.list, obj, NULL);
parse_events_error__exit(&parse_error);
+ if (err == -ENODATA) {
+ pr_debug("Failed to add events selected by BPF, debuginfo package not installed\n");
+ return TEST_SKIP;
+ }
if (err || list_empty(&parse_state.list)) {
pr_debug("Failed to add events selected by BPF\n");
return TEST_FAIL;
@@ -368,7 +372,7 @@ static struct test_case bpf_tests[] = {
"clang isn't installed or environment missing BPF support"),
#ifdef HAVE_BPF_PROLOGUE
TEST_CASE_REASON("BPF prologue generation", bpf_prologue_test,
- "clang isn't installed or environment missing BPF support"),
+ "clang/debuginfo isn't installed or environment missing BPF support"),
#else
TEST_CASE_REASON("BPF prologue generation", bpf_prologue_test, "not compiled in"),
#endif
