Merge "Enable the memory_recursiveprot mount option"

                return false;

            }

            result = mount("none", controller->path(), "cgroup2", MS_NODEV | MS_NOEXEC | MS_NOSUID,

                           nullptr);

            // The memory_recursiveprot mount option has been introduced by kernel commit

            // 8a931f801340 ("mm: memcontrol: recursive memory.low protection"; v5.7). Try first to

            // mount with that option enabled. If mounting fails because the kernel is too old,

            // retry without that mount option.

            if (mount("none", controller->path(), "cgroup2", MS_NODEV | MS_NOEXEC | MS_NOSUID,

                      "memory_recursiveprot") < 0) {

                LOG(INFO) << "Mounting memcg with memory_recursiveprot failed. Retrying without.";

                if (mount("none", controller->path(), "cgroup2", MS_NODEV | MS_NOEXEC | MS_NOSUID,

                          nullptr) < 0) {

                    PLOG(ERROR) << "Failed to mount cgroup v2";

                }

            }

            // selinux permissions change after mounting, so it's ok to change mode and owner now

            if (!ChangeDirModeAndOwner(controller->path(), descriptor.mode(), descriptor.uid(),