1. The virtual memory is equal to the process address space
2. Each process has its own process address space, namely each process has 4 gb virtual memory, so each process's address space is stored on disk? If it is, that if the program created 1000 processes, each process has 4 g, it needs to have 4 t disk space
Actually, want to ask whether the root of the problem is the process's address space is hard disk, if so, that a lot of embedded devices and there is not much on your hard drive, is if the process address space of 4 g?