Check out the list archives for more information but in a nut shell...

1. the sh3/sh4 vm code isn't the best... there are some race conditions and a
it is being re-worked by Jason R Thorpe as he gets time.

    see the message:

        Subject:
             Re: segfaults
        Date:
              Tue, 27 Feb 2001 19:43:59 -0800
        From:
              Jason R Thorpe <thorpej@zembu.com>

for more details.

2.  There has been other reports of reboots resulting from the vm code.


Marcus wrote:
>That particular run was with my own kernel, which has your patches
>yes.  When using msaitoh's kernel, I get reboots instead.

see message

    Subject:
         Re: segfaults
   Date:
         Wed, 28 Feb 2001 05:13:01 +0100 (MET)
   From:
         Marcus Comstedt <marcus@idonex.se>

The idea is that in mulit-user mode there are more processes running and
better chances for race conditions.  I think the reboots are a problem for
msaitoh's kernel and if you get a different kernel it should work out for you
a bit better.  I've got one w/NFS root and it is fix to work with 100mbps on
my site (www.ecst.csuchico.edu/~tbeede) if you what it.  Also can drop me an
email if it dosen't work or you need something else compiled in.

Thanks
Tyrel