hello.... > 1) A kernel thread is actually a process (task), isn't it? Then > what's the difference between a kernel thread and a normal task? yes, you are correct, kernel thread is a process because a task_struct is created to represent it. However..... Kernel thread is a process without a unique process address space specifically assigned to it. It is also created for single purpose...to execute specific function, e.g on pdflush, to flush out dirty page. > 2) In the structure task_struct, which represents a task, there is a > member "struct thread_struct". Does it have anything with threads as > light weigth processes (LWPs) to do? No. thread_struct is a structure to save hardware context during context switching. For example, it records eip (current instruction address), gs, fs (segment registers). I also found out that thread_struct records TLS entry related to the task. it is the TLS which has relation to LWP, but thread_struct is not.... regards Mulyadi -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
