Panic: attempted pmap_enter on 2MB page

[Dave Hayes]

Alan Cox <alc at rice.edu> writes:
> There are two pieces of information that might be helpful: the value of 
> the global variable "kernel_vm_end" and the virtual address that was 
> passed to pmap_enter().

I'm afraid I don't have enough experience with this debugger to get
these values with offhand commands. I could trial and error my way
through figuring it out, but I'd rather get the data you expect. :)
If you could give me the commands to do this, I'd be happy to type
them in and get a response to you. 

> Is this problem reproducible?  I don't recall if you mentioned that
> earlier.

Sort of. 

It seems that everytime I generate a bootable FreeBSD ISO, a die is
rolled.  If it comes up a certain number then it crashes, otherwise it's
fine. ;)

My ISO generation process might be relevant; I create a 600MB ramdisk
(it used to be 512 on FreeBSD 7.3) which loads from the ISO on
boot. This winds up being the root partition. 

As a datapoint the same die roll happens on FreeBSD 7.3 although the
chance of working seems to be greater. 

If you'd like a copy of the ISO to see this for yourself I can make it
available. I'm guessing it will also crash for you in this way modulo
hardware issues. 
-- 
Dave Hayes - Consultant - Altadena CA, USA - dave at jetcafe.org 
>>> The opinions expressed above are entirely my own <<<

The treasure house within you contains everything, and you
are free to use it. You don't need to seek outside.