Re: O_DIRECT address restrictions

[Andi Kleen <ak@xxxxxxx>]

> Probably a lot of work though.

Not very. You just have to change setup.c a bit to extent the mem_map above 
the physical addresses you want to copy.

It cannot be done by default because such a big mem_map eats quite a lot 
of memory.

Or put in enough physical memory that you have more than the max address
of the physical mapping (and don't use a NUMA/discontigmem machine) 

-Andi