Author: HuaQing vision embedded institute. The Linux device driver development "(08 and 09 sep TOP50) annual list of best-selling chapter 8, Linux device driver of clogging with the jam the I/O. Jam and the jam the I/O is device access two kinds of different pattern, the driver can the flexibility to support the user space on the equipment the two access method. Section 8.1 explain jam the I/O and the jam the I/O distinction, realize jam I/O wait queue mechanism, and in globalfifo device driver to increase in blocking the I/O support method, and the user space validation. Section 8.2 explain device driver polling (poll) operation concept and programming method, and can help users understand the poll operation of equipment is no block access. Section 8.3 in globalfifo explain in poll operate method, increase and the user space validation.

第8章、Linux设备驱动中的阻塞与非阻塞IO.pdf

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