[coyotos-dev] Guarded page tables

[Charles Landau]

At 9:18 AM -0400 6/15/07, Jonathan S. Shapiro wrote:
>On Thu, 2007-06-14 at 14:09 -0700, Charles Landau wrote:
>  > That problem is a result of allowing GPTs to have any l2v, not a
>>  result of allowing GPTs to have a fan-out of either 8 or 16.
>
>Not entirely. In any case I note that you have not replied with a
>decision procedure.

I do not have enough information.

At 4:41 PM -0400 6/14/07, Jonathan S. Shapiro wrote:
>We need to install a new GPT in order to
>support a newly valid address

Who needs to do this? A VCSK? A dynamic loader?

My general approach for such cases where you can't know in advance 
what structure is optimal, would be to use only l2v values of the 
form (log page size + n * (log of the natural arity of the GPT, 4 for 
Coyotos)) and ignore the extra flexibility. If you need a BG or HA 
key you might need one extra GPT; so what, we've already agreed we 
don't know how to make it optimal.