将内核空间vmalloc后不连续的内存地址映射到用户空间的驱动程序，2.4内核 和2.6内核两个版本，学内存分配必备资料。看完后就了解mmap原理了-Vmalloc kernel space will not be straight after the memory address is mapped to the user space driver, 2.4 kernel and 2.6 kernel versions, learning the necessary information o