On Tue, 13 Aug 2002, Jason R Thorpe wrote:

> On Tue, Aug 13, 2002 at 11:03:42PM -0700, Matt Thomas wrote:
>
>  > I could really use them in the mpc6xx pmap and it seems real
>  > inefficient to call PHYS_TO_VM_PAGE when the caller already
>  > has a struct vm_page *.
>
> Yah.  The problem was that there are some callers that don't have
> a vm_page *.  Those need to be accomodated somehow.  I'll try to
> look into it this week, seeing has how it would shave cycles on
> the ARM, and I'm doing ARM performance tweaking right now for my
> Day Job :-)

Maybe pass the vm_page *, and have a special value, say -1, that indicates
the caller doesn't know and the routine should call PHYS_TO_VM_PAGE? Or
would it be better to have all callers call PHYS_TO_VM_PAGE?

Take care,

Bill