diff options
author | Li Zhijian <lizhijian@cn.fujitsu.com> | 2021-09-02 05:43:33 +0300 |
---|---|---|
committer | Peter Zijlstra <peterz@infradead.org> | 2021-10-05 16:51:43 +0300 |
commit | 1c36432b278cecf1499f21fae19836e614954309 (patch) | |
tree | 909ddd4c92113e3c24b09fbfb2309d0b52a34d04 /tools/testing/selftests/sched | |
parent | d73df887b6b8174dfbb7f5f878fbd1e0e2eb3f08 (diff) | |
download | linux-1c36432b278cecf1499f21fae19836e614954309.tar.xz |
kselftests/sched: cleanup the child processes
Previously, 'make -C sched run_tests' will block forever when it occurs
something wrong where the *selftests framework* is waiting for its child
processes to exit.
[root@iaas-rpma sched]# ./cs_prctl_test
## Create a thread/process/process group hiearchy
Not a core sched system
tid=74985, / tgid=74985 / pgid=74985: ffffffffffffffff
Not a core sched system
tid=74986, / tgid=74986 / pgid=74985: ffffffffffffffff
Not a core sched system
tid=74988, / tgid=74986 / pgid=74985: ffffffffffffffff
Not a core sched system
tid=74989, / tgid=74986 / pgid=74985: ffffffffffffffff
Not a core sched system
tid=74990, / tgid=74986 / pgid=74985: ffffffffffffffff
Not a core sched system
tid=74987, / tgid=74987 / pgid=74985: ffffffffffffffff
Not a core sched system
tid=74991, / tgid=74987 / pgid=74985: ffffffffffffffff
Not a core sched system
tid=74992, / tgid=74987 / pgid=74985: ffffffffffffffff
Not a core sched system
tid=74993, / tgid=74987 / pgid=74985: ffffffffffffffff
Not a core sched system
(268) FAILED: get_cs_cookie(0) == 0
## Set a cookie on entire process group
-1 = prctl(62, 1, 0, 2, 0)
core_sched create failed -- PGID: Invalid argument
(cs_prctl_test.c:272) -
[root@iaas-rpma sched]# ps
PID TTY TIME CMD
4605 pts/2 00:00:00 bash
74986 pts/2 00:00:00 cs_prctl_test
74987 pts/2 00:00:00 cs_prctl_test
74999 pts/2 00:00:00 ps
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Chris Hyser <chris.hyser@oracle.com>
Link: https://lore.kernel.org/r/20210902024333.75983-1-lizhijian@cn.fujitsu.com
Diffstat (limited to 'tools/testing/selftests/sched')
-rw-r--r-- | tools/testing/selftests/sched/cs_prctl_test.c | 28 |
1 files changed, 18 insertions, 10 deletions
diff --git a/tools/testing/selftests/sched/cs_prctl_test.c b/tools/testing/selftests/sched/cs_prctl_test.c index 7db9cf822dc7..8109b17dc764 100644 --- a/tools/testing/selftests/sched/cs_prctl_test.c +++ b/tools/testing/selftests/sched/cs_prctl_test.c @@ -62,6 +62,17 @@ enum pid_type {PIDTYPE_PID = 0, PIDTYPE_TGID, PIDTYPE_PGID}; const int THREAD_CLONE_FLAGS = CLONE_THREAD | CLONE_SIGHAND | CLONE_FS | CLONE_VM | CLONE_FILES; +struct child_args { + int num_threads; + int pfd[2]; + int cpid; + int thr_tids[MAX_THREADS]; +}; + +static struct child_args procs[MAX_PROCESSES]; +static int num_processes = 2; +static int need_cleanup = 0; + static int _prctl(int option, unsigned long arg2, unsigned long arg3, unsigned long arg4, unsigned long arg5) { @@ -78,8 +89,14 @@ static int _prctl(int option, unsigned long arg2, unsigned long arg3, unsigned l #define handle_error(msg) __handle_error(__FILE__, __LINE__, msg) static void __handle_error(char *fn, int ln, char *msg) { + int pidx; printf("(%s:%d) - ", fn, ln); perror(msg); + if (need_cleanup) { + for (pidx = 0; pidx < num_processes; ++pidx) + kill(procs[pidx].cpid, 15); + need_cleanup = 0; + } exit(EXIT_FAILURE); } @@ -106,13 +123,6 @@ static unsigned long get_cs_cookie(int pid) return cookie; } -struct child_args { - int num_threads; - int pfd[2]; - int cpid; - int thr_tids[MAX_THREADS]; -}; - static int child_func_thread(void __attribute__((unused))*arg) { while (1) @@ -212,10 +222,7 @@ void _validate(int line, int val, char *msg) int main(int argc, char *argv[]) { - struct child_args procs[MAX_PROCESSES]; - int keypress = 0; - int num_processes = 2; int num_threads = 3; int delay = 0; int res = 0; @@ -262,6 +269,7 @@ int main(int argc, char *argv[]) printf("\n## Create a thread/process/process group hiearchy\n"); create_processes(num_processes, num_threads, procs); + need_cleanup = 1; disp_processes(num_processes, procs); validate(get_cs_cookie(0) == 0); |