With deeply analyzing and testing the part of how to identify the interactive and non-interactive process in the kernel of Linux 2.6.18,the writer found that the kernel can't identify the interactive process rightly in most of processes,especially for the processes of reading and writing hard disk.Though most books classify them as batch processes(non-interactive processes),Linux2.6.18 kernel identifies them interactive processes.This wrong activity will seriously affect the entire performance of the operat...