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SubjectRe: consequences of lowering "MAX_LOW_MEM"?
>> >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.

Yes, Matt's suggestion would work, though I never tried lowering
KERNELBASE. I don't think the kernel supports lowering it below
0x80000000 btw.


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