"I think the most exciting change is that after years of
arguing, the DRBD (Distributed Replicating Block Device) finally
got accepted into the mainline. It's the foundation of a lot of
high availability and disaster recovery solutions (including our
own SLE HA extensions).
"The next new piece of technology is I/O bandwidth controllers.
There had been about two competing ideas about how this should be
done, and it took two rounds of discussion at the Linux file system
and storage summit and finally a troubleshooting session at the
kernel summit to get final agreement. (I/O controllers allow for
much better fine-grained control over how I/O bandwidth is
allocated to virtual machines.)
"Finally, the ftrace subsystem acquired dynamic tracing in
2.6.33. That's a step to taking it a lot closer to rivalling the
functionality of Sun's dtrace."