Comment 23 for bug 214810

We have been coming across this bug quite frequently since moving to 8.04. Happened again today on 8.04.1. My work colleague tracked down the oops, and it is related to a bug in mainline:

http://www.kerneloops.org/search.php?search=graft_tree&btnG=Function+Search

He then found this discussion on the devel lists that discusses it, and possibly fixes it in 2.6.26 (upcoming).:

http://kerneltrap.org/mailarchive/linux-kernel/2008/6/3/2013554

So the good news is that the developers may have found the bug, but it'll likely need to be backported for Ubuntu. In any case, it is killing us at work, since a few of our desktops are being hit multiple times a week (others with nearly the same config seem fine, though).

BTW, symptoms are a slow deterioration of the system, and an inability to switch consoles or ssh in. The machine isn't dead, but its not well. I started logging in on a virtual console, so that when it happened I could dmesg, and found the Oops.