Re: consequences of lowering "MAX_LOW_MEM"?

[Benjamin Herrenschmidt]

>I think you'll find yourself with no virtual address space left to
>do vmalloc / fixmap / kmap type stuff. Or at least you would on i386,
>I presume it's the same for ppc. Sounds like you may have left
>yourself enough space for fixmap & kmap, but any calls to vmalloc
>will probably fail ?

Yes, same problem on PPC, you'll run out of virtual space quite
quickly for vmalloc and ioremap. Stuff a video board with lots
of VRAM or any PCI card exposing large MMIO regions into your
machines and it will probably not even boot.

Ben.