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SubjectRe: consequences of lowering "MAX_LOW_MEM"?
On Tue, 3 Sep 2002, Benjamin Herrenschmidt wrote:

> >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.

But doesn't using Matt's suggestion and moving both MAX_LOW_MEM and
changing KERNELBASE take care of this? It's an embedded board with no
video, but it does have one PCI Mezzanine Card (PMC) on it.


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