nr_hugepages is not set to zero because the file offset has not been reset
after read(). Fix that using lseek().
Fixes: bd67d5c15cc1 ("Test compaction of mlocked memory")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Dev Jain <dev.jain@xxxxxxx>
---
Merge dependency: https://lore.kernel.org/all/20240513082842.4117782-1-dev.jain@xxxxxxx/
Andrew, does it sound reasonable to have the fixes tag in the above
patch too, along with this series?
tools/testing/selftests/mm/compaction_test.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/tools/testing/selftests/mm/compaction_test.c b/tools/testing/selftests/mm/compaction_test.c
index 533999b6c284..c5be395f8363 100644
--- a/tools/testing/selftests/mm/compaction_test.c
+++ b/tools/testing/selftests/mm/compaction_test.c
@@ -107,6 +107,8 @@ int check_compaction(unsigned long mem_free, unsigned int hugepage_size)
goto close_fd;
}
+ lseek(fd, 0, SEEK_SET);
+
/* Start with the initial condition of 0 huge pages*/
if (write(fd, "0", sizeof(char)) != sizeof(char)) {
ksft_print_msg("Failed to write 0 to /proc/sys/vm/nr_hugepages: %s\n",
--
2.30.2
