I got a nasty kernel panic when using uemacs this morning:
Kernel panic: Trying to free up swapper memory space.
In swapper task - not syncing
Bug or not ? 
The scenario was a uemacs with 2 'windows', I had exited uemacs several times 
(with ^X^C) and used gas in between.
Although it doesnt't say much I wrote down the preceding infolines 
if they can be some clue:
EIP: 000f:67c4
EFLAGS: 13213
ESP: 17:23558
base: 0, limit: A0000
Stack: 0 ffc 13f 5412
Pid: 0, proc. nr: 00x07
 89 02 eb ef 8d 65 f8 5e 57 c1

The panic resulted in a corrupted CMOS too ! Which I recall somebody had
earlier.

/Mats Andersson (d88-man@nada.kth.se)