[LTP] [COMMITTED] [PATCH] pids.sh: Fix spurious failures in test3 cleanup.

[Cyril Hrubis]

Sometimes the possitive testcases were failing in cleanup:

kill: (17773): No such process
 1 TBROK: kill -9 17773 failed

The reason is that when we fork pids_task1 the child is running in the
particual subgroup and hence it's pid is in the task file. And since the
child process did only exit(0) there was a race between the process exit
and the stop_pids_task function that read the tasks file.

The fix is obvious, we suspend the pids_task1 child to wait patiently
for it's execution.

Signed-off-by: Cyril Hrubis <chrubis@suse.cz>
---
 testcases/kernel/controllers/pids/pids_task1.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/testcases/kernel/controllers/pids/pids_task1.c b/testcases/kernel/controllers/pids/pids_task1.c
index 7feae1e07..a7e5d92d3 100644
--- a/testcases/kernel/controllers/pids/pids_task1.c
+++ b/testcases/kernel/controllers/pids/pids_task1.c
@@ -56,5 +56,7 @@ int main(int argc, char **argv)
 		perror("fork() failed");
 		return 1;
 	}
+	if (newpid == 0)
+		pause();
 	return 0;
 }
-- 
2.13.6