Currently, if at runtime we are not able to allocate a huge page, the
test will trivially pass on Aarch64 due to no exception being raised on
division by zero while computing compaction_index. Fix that by checking
for nr_hugepages == 0. Anyways, in general, avoid a division by zero by
exiting the program beforehand. While at it, fix a typo.
Signed-off-by: Dev Jain <dev.jain@xxxxxxx>
---
tools/testing/selftests/mm/compaction_test.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/mm/compaction_test.c b/tools/testing/selftests/mm/compaction_test.c
index 533999b6c284..df1b76f9c734 100644
--- a/tools/testing/selftests/mm/compaction_test.c
+++ b/tools/testing/selftests/mm/compaction_test.c
@@ -134,6 +134,10 @@ int check_compaction(unsigned long mem_free, unsigned int hugepage_size)
/* We should have been able to request at least 1/3 rd of the memory in
huge pages */
+ if (!atoi(nr_hugepages)) {
+ ksft_print_msg("ERROR: No memory is available as huge pages\n");
+ goto close_fd;
+ }
compaction_index = mem_free/(atoi(nr_hugepages) * hugepage_size);
lseek(fd, 0, SEEK_SET);
@@ -149,7 +153,7 @@ int check_compaction(unsigned long mem_free, unsigned int hugepage_size)
atoi(nr_hugepages));
if (compaction_index > 3) {
- ksft_print_msg("ERROR: Less that 1/%d of memory is available\n"
+ ksft_print_msg("ERROR: Less than 1/%d of memory is available\n"
"as huge pages\n", compaction_index);
goto close_fd;
}
--
2.39.2
