cgroup v2模式下，systemd的cpuset配置无法持久化生效

**【缺陷描述】：请补充详细的缺陷问题现象描述**
cgroup v2模式下，systemd的cpuset配置无法持久化生效

**一、缺陷信息**

**【缺陷所属的os版本】
    openEuler-22.03-LTS-SP1

**【内核版本】
     4.19

**【缺陷所属软件及版本号】
[root@localhost ~]# systemctl  --version 
systemd 249 ：v249-97
+PAM +AUDIT +SELINUX -APPARMOR +IMA -SMACK +SECCOMP +GCRYPT +GNUTLS -OPENSSL +ACL +BLKID -CURL -ELFUTILS -FIDO2 +IDN2 -IDN -IPTC +KMOD -LIBCRYPTSETUP +LIBFDISK +PCRE2 -PWQUALITY +P11KIT -QRENCODE +BZIP2 +LZ4 +XZ +ZLIB -ZSTD +XKBCOMMON +UTMP +SYSVINIT default-hierarchy=legacy

**【环境信息】**
硬件信息
VMware   x86-64 虚拟机，4核，4g内存

- 虚拟机场景：宿主机：win 11

软件信息
systemd 249 ：v249-97

网络信息
无

**【问题复现步骤】：请描述具体的操作步骤**
	0、设置相关服务开机自启
           systemctl enable containerd
	1、配置持久启用 +cpuset 的自定义 systemd unit（例如 containerd）
	  通过创建一个 drop-in 文件：

mkdir -p /etc/systemd/system/containerd.service.d
    	    cat <<EOF > /etc/systemd/system/containerd.service.d/10-cpuset.conf
    	    [Service]
        	Delegate=cpu cpuset io memory pids
    	    EOF

其中，Delegate=xxx可自定义

2、应用上述更改后需要执行以下命令后生效：
	    systemctl daemon-reload
	    systemctl restart containerd

3、
	    echo +cpuset > /sys/fs/cgroup/cgroup.subtree_control
	    echo +cpuset > /sys/fs/cgroup/system.slice/cgroup.subtree_control

cat  /sys/fs/cgroup/cgroup.subtree_control
            cat  /sys/fs/cgroup/system.slice/cgroup.subtree_control 
        
         4、重启系统，执行如下命令
            cat  /sys/fs/cgroup/cgroup.subtree_control
            cat  /sys/fs/cgroup/system.slice/cgroup.subtree_control

**【实际结果】**，如下所示：
 [root@localhost ~]# cat  /sys/fs/cgroup/cgroup.subtree_control
    cat  /sys/fs/cgroup/system.slice/cgroup.subtree_control 
cpu io memory pids
cpu io memory pids

**【期望结果】**，如下所示：
[root@localhost ~]# cat  /sys/fs/cgroup/cgroup.subtree_control
    cat  /sys/fs/cgroup/system.slice/cgroup.subtree_control 
cpuset cpu io memory pids
cpuset cpu io memory pids

**【其他相关附件信息】**
[root@localhost ~]#     systemctl status containerd
● containerd.service - containerd container runtime
     Loaded: loaded (/usr/lib/systemd/system/containerd.service; enabled; vendor preset: disabled)
    Drop-In: /etc/systemd/system/containerd.service.d
             └─10-cpuset.conf
     Active: active (running) since Sat 2025-07-05 04:24:58 CST; 45min ago
       Docs: https://containerd.io
    Process: 1037 ExecStartPre=/sbin/modprobe overlay (code=exited, status=0/SUCCESS)
   Main PID: 1053 (containerd)
      Tasks: 20
     Memory: 74.8M
        CPU: 4.671s
     CGroup: /system.slice/containerd.service
             └─ 1053 /usr/bin/containerd

Jul 05 04:24:58 localhost containerd[1053]: time="2025-07-05T04:24:58.733563041+08:00" level=info msg="Start subscribing cont>
Jul 05 04:24:58 localhost containerd[1053]: time="2025-07-05T04:24:58.734448649+08:00" level=info msg="Start recovering state"
Jul 05 04:24:58 localhost containerd[1053]: time="2025-07-05T04:24:58.734732066+08:00" level=info msg="Start event monitor"
Jul 05 04:24:58 localhost containerd[1053]: time="2025-07-05T04:24:58.735119416+08:00" level=info msg="Start snapshots syncer"
Jul 05 04:24:58 localhost containerd[1053]: time="2025-07-05T04:24:58.735148420+08:00" level=info msg="Start cni network conf>
Jul 05 04:24:58 localhost containerd[1053]: time="2025-07-05T04:24:58.735188198+08:00" level=info msg="Start streaming server"
Jul 05 04:24:58 localhost containerd[1053]: time="2025-07-05T04:24:58.735465174+08:00" level=info msg=serving... address=/run>
Jul 05 04:24:58 localhost containerd[1053]: time="2025-07-05T04:24:58.735547451+08:00" level=info msg=serving... address=/run>
Jul 05 04:24:58 localhost containerd[1053]: time="2025-07-05T04:24:58.736152497+08:00" level=info msg="containerd successfull>
Jul 05 04:24:58 localhost systemd[1]: Started containerd container runtime

**【缺陷详情及分析指导参考链接】**

**二、缺陷分析结构反馈**
影响性分析说明：

缺陷严重等级:(Critical/High/Moderate/Low)

缺陷根因说明:

受影响版本排查(受影响/不受影响):
openEuler-20.03-LTS-SP4
openEuler-22.03-LTS-SP3
openEuler-22.03-LTS-SP4
openEuler-24.03-LTS
openEuler-24.03-LTS-SP1

修复是否涉及abi变化(是/否):
openEuler-20.03-LTS-SP4
openEuler-22.03-LTS-SP3
openEuler-22.03-LTS-SP4
openEuler-24.03-LTS
openEuler-24.03-LTS-SP1

src-openEuler/systemd

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