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SubjectRe: Question about Zone Allocation 2.4.X
On Thu, Jan 02, 2003 at 06:15:54PM -0700, Jeff V. Merkey wrote:
> Looks like we simply jetisioned the concept of a PPL (Physical Pages
> List) and went with a zone allocator instead. I'm sure there was a
> good reason for it historically. Rolling a separate zone is exactly
> what I was thinking when I reviewed the code intially. Question,
> which files will be affected so when I put this one in, I don't end
> up breaking the VM and userspace balancing logic. i.e. Could you
> point me to Jens' ZONE_DMA32 code as well.

Adding new zone types is easy. Just add them to mmzone.h, avoid setting
->virtual (which does not universally exist) in free_area_init_core()
if it's not perma-mapped, stuff them in the fallback sequence in
build_zonelists(), and detect them in arch/*/mm/init.c

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