On Wednesday 20 October 2004 13:42, DigitalSecure wrote: > I have a little question about threads and processes. > > If we say 2 or more processes can execute a same > program, then are different threads of a running > program also referred to as processes? If yes, what is > meant by "Linux creates processes by fork() syscall." > Thread creation doesnot involve any call to fork > syscall, then why are threads treated as processes? To hopefully keep it simple, different processes have different address spaces. Different threads (within a single process) share an address space. Other then that, there is not much different between threads and processes from the kernel's point of view. If that doesn't help try this. The kernel schedules (exeutes) a bunch of tasks (processes/threads). i.e. a task is a scheduable entity. Each process is composed of one or more tasks. Most process (non-threaded ones) are only one task. All threads in a specific process share their address space. fork() creates a new process, but duplicating the current one, clone() with the right arguments, will create another thread of the invoking process. -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
