"I spend most of my time teaching classes on Solaris internals,
device drivers, and kernel crash dump analysis and debugging. When
explaining to classes how various subsystems are implemented in
Solaris, students often ask, 'How does it work in Linux?' or, 'In
FreeBSD, it works like this, how about Solaris?' This article
examines three of the basic subsystems of the kernel and compares
implementation between Solaris 10, Linux 2.6, and FreeBSD 5.3.
"The three subsystems examined are scheduling, memory
management, and file system architecture. I chose these subsystems
because they are common to any operating system (not just Unix and
Unix-like systems), and they tend to be the most well-understood
components of the operating system..."