iozone: buffer overflow in ubuntu jaunty

In the latest Ubuntu Jaunty iozone immediately crashes with a nice *** buffer overflow detected *** message, that means it is practically unusable. Fortunately the cause of the bug is very simple: a wrong length used to copy a string by gethostname(). I posted a fix here.

cgroup: io-throttle controller (v13)

A new version of my IO controller for Linux cgroups.

LWN.net coverage at http://lwn.net/Articles/328484/.