Linux has various parts of the hotplug subsystem and events subsystem, which work together when a new device is inserted before it becomes available. Linux has a permanent kernel_thread helper running called khelper. This thread is occasionally used as a schedulable context for stuff that call_usermode_helper wants to run - like /sbin/hotplug or modprobe. It’s a pretty cool solution to the problem of calling out to userspace for help. khelper is responsible for running up hotplug when I insert my wifi card, which then configures the netdevice and hooks up ifplugd to watch for net events。
这是我找到的一段关于khelper的介绍，但是我想详细了解一下，有没有高人给讲解一下哈，翻译就不必要了，我还是看的懂这段英文的，谢谢！
于 2012-02-13 15:35:38发表:
应该是用来在kernel中调用User space的进程的
wurr707 于 2011-11-09 22:14:11发表:
2# alick
就是介绍khelper的进程啊，我找了好多资料，只有这段英文是最有用的了，所以看看这里询问高手一下
alick 于 2011-11-04 19:08:36发表:
楼主讲明白需求啊？想详细了解什么东西？
找不来更多介绍了？