10
votes
4answers
6k views

Use of O_DIRECT on Linux

If this question is too programmer oriented, let me know. I wonder if there are people familiar with the O_DIRECT flag for the open() system call on Linux 2.6? Linus disparages its use, however high ...
5
votes
1answer
1k views

Usage of inb, inl, inw to access kernel space from user space

What are some user space examples of using inb, inl, and inw to access kernel space in Linux?