January 2004
Intermediate to advanced
432 pages
11h 1m
English
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Drivers and Switch Tables
The bottom portion of Figure 3-14 shows two switch tables. One is used for accessing block device drivers and the other for raw device drivers. A raw device is one to which data is transferred in byte streams of varying sizes.
A raw device may receive a single byte or many megabytes in a single transfer (or even gigabytes in today's computing climate). Raw device access is also used to talk to and configure device controllers and interface cards when necessary.
Block devices hold mountable file systems. All I/O to a block device is directed through the system's buffer cache to reduce physical requests to logical requests whenever possible for speed and convenience
As drivers are built into the kernel image or registered ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.