int
_slurm_cgroup_get_pids(uint64_t id, pid_t **pids, int *npids)
{
if (*jobstep_cgroup_path == '\0')
return SLURM_ERROR;
return xcgroup_get_pids(&step_freezer_cg, pids, npids);
}
extern int task_cgroup_cpuset_fini(slurm_cgroup_conf_t *slurm_cgroup_conf)
{
xcgroup_t cpuset_cg;
/* Similarly to task_cgroup_memory_fini(), we must lock the
* root cgroup so we don't race with another job step that is
* being started. */
if (xcgroup_create(&cpuset_ns, &cpuset_cg,"",0,0) == XCGROUP_SUCCESS) {
if (xcgroup_lock(&cpuset_cg) == XCGROUP_SUCCESS) {
int i = 0, npids = 0, cnt = 0;
pid_t* pids = NULL;
/* First move slurmstepd to the root cpuset cg
* so we can remove the step/job/user cpuset
* cg's. */
xcgroup_move_process(&cpuset_cg, getpid());
/* There is a delay in the cgroup system when moving the
* pid from one cgroup to another. This is usually
* short, but we need to wait to make sure the pid is
* out of the step cgroup or we will occur an error
* leaving the cgroup unable to be removed.
*/
do {
xcgroup_get_pids(&step_cpuset_cg,
&pids, &npids);
for (i = 0 ; i<npids ; i++)
if (pids[i] == getpid()) {
cnt++;
break;
}
xfree(pids);
} while ((i < npids) && (cnt < MAX_MOVE_WAIT));
if (cnt < MAX_MOVE_WAIT)
debug3("Took %d checks before stepd pid was removed from the step cgroup.",
cnt);
else
error("Pid %d is still in the step cgroup. It might be left uncleaned after the job.",
getpid());
if (xcgroup_delete(&step_cpuset_cg) != SLURM_SUCCESS)
debug2("task/cgroup: unable to remove step "
"cpuset : %m");
if (xcgroup_delete(&job_cpuset_cg) != XCGROUP_SUCCESS)
debug2("task/cgroup: not removing "
"job cpuset : %m");
if (xcgroup_delete(&user_cpuset_cg) != XCGROUP_SUCCESS)
debug2("task/cgroup: not removing "
"user cpuset : %m");
xcgroup_unlock(&cpuset_cg);
} else
error("task/cgroup: unable to lock root cpuset : %m");
xcgroup_destroy(&cpuset_cg);
} else
error("task/cgroup: unable to create root cpuset : %m");
if (user_cgroup_path[0] != '\0')
xcgroup_destroy(&user_cpuset_cg);
if (job_cgroup_path[0] != '\0')
xcgroup_destroy(&job_cpuset_cg);
if (jobstep_cgroup_path[0] != '\0')
xcgroup_destroy(&step_cpuset_cg);
user_cgroup_path[0]='\0';
job_cgroup_path[0]='\0';
jobstep_cgroup_path[0]='\0';
xcgroup_ns_destroy(&cpuset_ns);
return SLURM_SUCCESS;
}