Okay, I've resolved the issue of df showing decreased space with each iteration. It turns out that konsole was saving the scrollback history to /tmp. Disabling that solved that particular problem.
kjournald2 is still writing every so often to disk. I assume that this is just updating dirty inodes caused by the running WM. I guess this bug should be marked as invalid or not fixing.
Okay, I've resolved the issue of df showing decreased space with each iteration. It turns out that konsole was saving the scrollback history to /tmp. Disabling that solved that particular problem.
kjournald2 is still writing every so often to disk. I assume that this is just updating dirty inodes caused by the running WM. I guess this bug should be marked as invalid or not fixing.