调用此函数从I / O处理器线程上下文，因此应该采取一种方式，它消耗最少量的时间，相同的线程处理多个会话执行。
This function is invoked from the I/O processor thread context, hence should be implemented in a way that it consumes minimal amount of time, as the same thread handles multiple sessions.
在内核中，这些进程称为线程，代表了单独的处理器虚拟化(线程代码、数据、堆栈和CPU寄存器)。
In the kernel, these are called threads and represent an individual virtualization of the processor (thread code, data, stack, and CPU registers).
从本质上讲，任何进程或线程都可以分派到任意处理器上运行，但绑定在特定处理器上运行的处理器或线程除外。
Essentially, any process or thread can be dispatched to run on any processor, except for processors or threads that are bound to run on a specific processor.
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