Merge "libprocessgroup: Mount cpuset v1 with cpuset_v2_mode" into main

        return false;

    }

    // Unfortunately historically cpuset controller was mounted using a mount command

    // different from all other controllers. This results in controller attributes not

    // to be prepended with controller name. For example this way instead of

    // /dev/cpuset/cpuset.cpus the attribute becomes /dev/cpuset/cpus which is what

    // the system currently expects.

    int res;

    std::string options = controller->name();

    if (!strcmp(controller->name(), "cpuset")) {

        // mount cpuset none /dev/cpuset nodev noexec nosuid

        res = mount("none", controller->path(), controller->name(),

                    MS_NODEV | MS_NOEXEC | MS_NOSUID, nullptr);

    } else {

        // mount cgroup none <path> nodev noexec nosuid <controller>

        res = mount("none", controller->path(), "cgroup", MS_NODEV | MS_NOEXEC | MS_NOSUID,

                    controller->name());

        // Android depends on the noprefix option for cpuset so that cgroupfs files are not prefixed

        // with the controller name. For example /dev/cpuset/cpus instead of

        //                                       /dev/cpuset/cpuset.cpus.

        // cpuset_v2_mode is required to restore the original cpu mask after a cpu is offlined, and

        // then onlined in cgroup v1.

        options += ",noprefix,cpuset_v2_mode";

    }

    if (res != 0) {

    if (mount("none", controller->path(), "cgroup", MS_NODEV | MS_NOEXEC | MS_NOSUID,

              options.c_str())) {

        if (IsOptionalController(controller)) {

            PLOG(INFO) << "Failed to mount optional controller " << controller->name();

            return true;