你好，会遇到下面这个报错 /var/swap.1 没有权限，我设置了它指定的权限好像还是不行

root@9d70ce4aede1:/www/web# free -m
             total       used       free     shared    buffers     cached
Mem:           985        725        260          1          5         78
-/+ buffers/cache:        641        343
Swap:            0          0          0
root@9d70ce4aede1:/www/web# /bin/dd if=/dev/zero of=/var/swap.1 bs=1M count=1024
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB) copied, 3.61912 s, 297 MB/s
root@9d70ce4aede1:/www/web# /sbin/mkswap /var/swap.1
Setting up swapspace version 1, size = 1048572 KiB
no label, UUID=0110fb0f-9d9d-4d52-b19d-a9b482030d95
root@9d70ce4aede1:/www/web# /sbin/swapon /var/swap.1
swapon: /var/swap.1: insecure permissions 0644, 0600 suggested.
swapon: /var/swap.1: swapon failed: Operation not permitted
root@9d70ce4aede1:/www/web# free -m
             total       used       free     shared    buffers     cached
Mem:           985        923         61          1          2        271
-/+ buffers/cache:        649        335
Swap:            0          0          0

```