Re: [PATCH] selftests/mm:fix test_prctl_fork_exec return failure

On 17.06.24 07:29, aigourensheng wrote:

after calling fork() in the test_prctl_fork_exec() function, the global variable ksm_full_scans_fd is initialized to 0 in the child process upon entering the main function of ./ksm_functional_tests. In the function call chain test_child_ksm() -> __mmap_and_merge_range -> ksm_merge-> ksm_get_full_scans, start_scans = ksm_get_full_scans() will return an error. Therefore, the value of ksm_full_scans_fd needs to be initialized before calling test_child_ksm in the child process.

Signed-off-by: aigourensheng shechenglong001@gmail.com

Acked-by: David Hildenbrand david@redhat.com