walt-yuan
walt-yuan
/ mmap_zcopy
Created
May 17, 2023 06:31
— forked from laoar/mmap_zcopy
an example of kernel space to user space zero-copy via mmap, and also the comparing mmap with read/write
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| #include <linux/module.h> | |
| #include <linux/kernel.h> | |
| #include <linux/device.h> | |
| #include <linux/init.h> | |
| #include <linux/fs.h> | |
| #include <linux/mm.h> | |
| #include <asm/uaccess.h> | |
| #define MAX_SIZE (PAGE_SIZE * 2) /* max size mmaped to userspace */ | |
| #define DEVICE_NAME "mchar" |