User-mode Linux kernel port

No, not a HyperThreaded Pentium 4 Dual Xeon Extreme Edition(TM)...  On a 
lark, I decided to build a Pentium 166 (with a whopping 32MB RAM) system 
from spare parts and boot a development version of Finnix 
(www.finnix.org) on it.  After Finnix was up, I decided to give UML a 
try.  This was the result:

(host) root@...:~# cat /proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 5
model           : 2
model name      : Pentium 75 - 200
stepping        : 12
cpu MHz         : 165.830
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : yes
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr mce cx8
bogomips        : 332.76

(guest) root@...:~# uname -a
Linux finnix 2.6.15-um-finnix #1 Mon Jan 2 23:05:07 PST 2006 i586 GNU/Linux
(guest) root@...:~# cat /proc/cpuinfo
processor       : 0
vendor_id       : User Mode Linux
model name      : UML
mode            : skas
host            : Linux finnix 2.6.15-4-x86-finnix #1 SMP Wed Mar 22 
17:51:34 PST 2006 i586
bogomips        : 69.42

Yes, i586 and SKAS seem to work fine.  I was getting segfaults at random 
times, but it turns out I was setting 64M for the guest, and the tmpfs 
ramdisk that /tmp is mounted on was only 21MB, and much of that was 
already used by the OS.  (Unfortunately, Finnix must calculate an 
appropriate size (80% of the total memory) and create the ramdisk before 
any swap partitions can be taken into consideration.)  I added a gig of 
swap, created a different tmpfs partition with enough space, reset 
TMPDIR, and it was fine after that.

So I guess that's my story: Yes, UML and SKAS will work fine with 
relatively ancient hardware.  I do plan on trying the same things with a 
486 some day, but I'll have to find a working one first...

RF