diff options
| author | Andrea Righi <arighi@nvidia.com> | 2025-07-01 08:08:45 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-07-24 08:56:30 +0200 |
| commit | dc05051dd10d6284c94fb06899d34e56654c0f59 (patch) | |
| tree | 9cd6be27d02997a4a860a2505e6ba01eeea0c050 | |
| parent | 6952aeace93f8c9ea01849efecac24dd3152c9c9 (diff) | |
selftests/sched_ext: Fix exit selftest hang on UP
[ Upstream commit 7980ad7e4ca80f6c255f4473fba82a475342035a ]
On single-CPU systems, ops.select_cpu() is never called, causing the
EXIT_SELECT_CPU test case to wait indefinitely.
Avoid the stall by skipping this specific sub-test when only one CPU is
available.
Reported-by: Phil Auld <pauld@redhat.com>
Fixes: a5db7817af780 ("sched_ext: Add selftests")
Signed-off-by: Andrea Righi <arighi@nvidia.com>
Reviewed-by: Phil Auld <pauld@redhat.com>
Tested-by: Phil Auld <pauld@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | tools/testing/selftests/sched_ext/exit.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/tools/testing/selftests/sched_ext/exit.c b/tools/testing/selftests/sched_ext/exit.c index 31bcd06e21cd..2c084ded2968 100644 --- a/tools/testing/selftests/sched_ext/exit.c +++ b/tools/testing/selftests/sched_ext/exit.c @@ -22,6 +22,14 @@ static enum scx_test_status run(void *ctx) struct bpf_link *link; char buf[16]; + /* + * On single-CPU systems, ops.select_cpu() is never + * invoked, so skip this test to avoid getting stuck + * indefinitely. + */ + if (tc == EXIT_SELECT_CPU && libbpf_num_possible_cpus() == 1) + continue; + skel = exit__open(); skel->rodata->exit_point = tc; exit__load(skel); |