diff options
Diffstat (limited to 'tools/testing')
| -rw-r--r-- | tools/testing/selftests/mm/uffd-stress.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/tools/testing/selftests/mm/uffd-stress.c b/tools/testing/selftests/mm/uffd-stress.c index 4ba5bf13a010..40af7f67c407 100644 --- a/tools/testing/selftests/mm/uffd-stress.c +++ b/tools/testing/selftests/mm/uffd-stress.c @@ -435,6 +435,7 @@ static void sigalrm(int sig) int main(int argc, char **argv) { + unsigned long nr_cpus; size_t bytes; if (argc < 4) @@ -453,7 +454,15 @@ int main(int argc, char **argv) return KSFT_SKIP; } - nr_parallel = sysconf(_SC_NPROCESSORS_ONLN); + nr_cpus = sysconf(_SC_NPROCESSORS_ONLN); + if (nr_cpus > 32) { + /* Don't let calculation below go to zero. */ + ksft_print_msg("_SC_NPROCESSORS_ONLN (%lu) too large, capping nr_threads to 32\n", + nr_cpus); + nr_parallel = 32; + } else { + nr_parallel = nr_cpus; + } nr_pages_per_cpu = bytes / page_size / nr_parallel; if (!nr_pages_per_cpu) { |