LinitD uses a full CPU core

[niaow]

The CPU usage is always a full core. And in QEMU, it brings the system to 100% CPU. I think my low epoll timeout is causing way too many context switches. If I dynamically adjust the timing, I should be able to cut back the usage.

[niaow]

This is apparently not the error: epoll seems to get stuck sending us EPOLLIN, but we read 0 bytes with read. Not really sure what is going on.