Suspicious activity in Linux!
For the 3rd time in 2 months, this has happened...
Two processes pop up in my process list (in System Activity, Ctrl+Esc). They have no name, or command string. Their owner is "root, -1" (no other processes running have "-1" in their user string). Their CPU usage is reported as "unknown". I can't kill them, because they are constantly going away, and popping back up (which effectively revives them, and changes their PID). In the coming up/going away shuffle, sometimes System Activity will report 3 process being there (but it's almost always 2).
I have a dual core, so when a program maxes out the CPU, it'll only use one core, which is nice when things misbehave. But my CPU usage widgets are showing that these processes are consistently using about 3/4 of both cores at the same time. (Makes sense, right? 2 processes, 2 cores)
This goes on for about 5 minutes then stops. And there seems to be no apparent reason why this happens, I can't think of anything that I do that might trigger it. The first time it happened was not to soon after I installed my OS, so the first time could've been triggered by that (if it's nice), or by the installation of a bad package (if it's not nice).
This is so un-Linux-like, which makes me that much more uneasy about it.
Anyone have any idea what could be going on? Or how to get more information about how certain processes came about?