参考：redhat linux deployment guide--5.2.21. /proc/modules
This file displays a list of all modules loaded into the kernel. Its contents vary based on the configuration and use of your system, but it should be organized in a similar manner to this sample /proc/modules file output:
~$cat /proc/modules
rfcomm - Live 0x00000000
bnep - Live 0x00000000
uvcvideo - Live 0x00000000
videobuf2_vmalloc uvcvideo, Live 0x00000000
videobuf2_memops videobuf2_vmalloc, Live 0x00000000
videobuf2_core uvcvideo, Live 0x00000000
videodev uvcvideo,videobuf2_core, Live 0x00000000
The first column contains the name of the module.
The second column refers to the memory size of the module, in bytes.
The third column lists how many instances of the module are currently loaded. A value of zero represents an unloaded module.
The fourth column states if the module depends upon another module to be present in order to function, and lists those other modules.
The fifth column lists what load state the module is in: Live, Loading, or Unloading are the only possible values.
The sixth column lists the current kernel memory offset for the loaded module. This information can be useful for debugging purposes, or for profiling tools such as oprofile.
第一列： 模块的名字
第二列： 模块的内存大小，单位是bytes
第三列： 被load的次数，0以为着没有被load过
第四列： 是否依赖第三方moudle，列出这些module
第五列： 模块的状态，有Live， Loading， Unloading三种状态
第六列： 模块当前的内核内存偏移位置。这些信息，debug的时候会非常有用。例如一些诊断工具 oprofile。
/proc/modules :模块加载列表,insmod（加载模块）后在此添加一行。
