func (raw *cgroupData) join(subsystem string) (string, error) {
path, err := raw.path(subsystem)
if err != nil {
return "", err
}
if err := os.MkdirAll(path, 0755); err != nil {
return "", err
}
if err := cgroups.WriteCgroupProc(path, raw.pid); err != nil {
return "", err
}
return path, nil
}
func join(c *configs.Cgroup, subsystem string, pid int) (string, error) {
path, err := getSubsystemPath(c, subsystem)
if err != nil {
return "", err
}
if err := os.MkdirAll(path, 0755); err != nil {
return "", err
}
if err := cgroups.WriteCgroupProc(path, pid); err != nil {
return "", err
}
return path, nil
}
func (s *CpusetGroup) ApplyDir(dir string, cgroup *configs.Cgroup, pid int) error {
// This might happen if we have no cpuset cgroup mounted.
// Just do nothing and don't fail.
if dir == "" {
return nil
}
root, err := getCgroupRoot()
if err != nil {
return err
}
if err := s.ensureParent(dir, root); err != nil {
return err
}
// because we are not using d.join we need to place the pid into the procs file
// unlike the other subsystems
if err := cgroups.WriteCgroupProc(dir, pid); err != nil {
return err
}
return nil
}
func (s *CpusetGroup) ApplyDir(dir string, cgroup *configs.Cgroup, pid int) error {
// This might happen if we have no cpuset cgroup mounted.
// Just do nothing and don't fail.
if dir == "" {
return nil
}
root, err := getCgroupRoot()
if err != nil {
return err
}
// 'ensureParent' start with parent because we don't want to
// explicitly inherit from parent, it could conflict with
// 'cpuset.cpu_exclusive'.
if err := s.ensureParent(filepath.Dir(dir), root); err != nil {
return err
}
if err := os.MkdirAll(dir, 0755); err != nil {
return err
}
// We didn't inherit cpuset configs from parent, but we have
// to ensure cpuset configs are set before moving task into the
// cgroup.
// The logic is, if user specified cpuset configs, use these
// specified configs, otherwise, inherit from parent. This makes
// cpuset configs work correctly with 'cpuset.cpu_exclusive', and
// keep backward compatbility.
if err := s.ensureCpusAndMems(dir, cgroup); err != nil {
return err
}
// because we are not using d.join we need to place the pid into the procs file
// unlike the other subsystems
if err := cgroups.WriteCgroupProc(dir, pid); err != nil {
return err
}
return nil
}
func (s *CpuGroup) ApplyDir(path string, cgroup *configs.Cgroup, pid int) error {
// This might happen if we have no cpu cgroup mounted.
// Just do nothing and don't fail.
if path == "" {
return nil
}
if err := os.MkdirAll(path, 0755); err != nil {
return err
}
// We should set the real-Time group scheduling settings before moving
// in the process because if the process is already in SCHED_RR mode
// and no RT bandwidth is set, adding it will fail.
if err := s.SetRtSched(path, cgroup); err != nil {
return err
}
// because we are not using d.join we need to place the pid into the procs file
// unlike the other subsystems
if err := cgroups.WriteCgroupProc(path, pid); err != nil {
return err
}
return nil
}