// we don't have to muck with greediness. TrimSuffix is no-copy so this
	// is cheap.
	cgroupPath = strings.TrimSuffix(cgroupPath, ".scope")

	var matchResults map[string]string
	for _, regex := range cgroupREs {
		matches := reSubMatchMap(regex, cgroupPath)
		if isValidCGroupPathMatches(matches) {
			if matchResults != nil {
				return "", "", false
			}
			matchResults = matches