when to mark reserved low memory pages

[Benjamin Herrenschmidt]

On Tue, 2004-09-28 at 01:11, John Rose wrote:
> On Fri, 2004-09-24 at 21:15, Benjamin Herrenschmidt wrote:
> > Why ? because they get freed when you mmap them and later quit the
> > userland process ? In this case, the option of marking them reserved
> > might lead to an ever increasing page count (or not), make very sure
> > of that, as get_page() will increase count but free_page() will not
> > decrease it for a reserved page.
> 
> Ok retry :)  If you were in a hypothetical situation where page count
> wasn't the issue, and you specifically needed the pages marked reserved,
> where would you do it?

Some time right after mem_init() I suppose...

> And how to handle the discontig case?

Not too sure

Ben.