linux，loop0是什么进程，这么占cpu？

Question

我就用dockr安装了个邮件服务器自己用，然后top看了下，吓死我了，之前都是0点多负载。

Answer 1

In Unix-like operating systems, a loop device, vnd (vnode disk), or lofi (loopback file interface) is a pseudo-device that makes a file accessible as a block device.

看上去你的磁盘压力太大了。

用 iotop 看看。