This patch rewrites part of the discontig code in 2.5 (based on Jack and
Kimi's work) to achieve a few things:

  o fix bugs so that sn2 will work
  o allow the virtual mem map to be used along with discontigmem
  o allow generic kernels to work across all platforms

There are a few hunks that remove #ifdef CONFIG_VIRTUAL_MEMMAP lines,
but maybe that config option should be removed altogether and made the
default?  It would be nice to do that for CONFIG_DISCONTIGMEM too, but
that would mean touching other architectures, so is less likely to
happen.  There's also still an issue with CONFIG_FORCE_MAX_ZONEORDER.

I'd appreciate any feedback (testing, comments) that you can provide.

Here's the diffstat:

 arch/ia64/Kconfig            |   40 -----
 arch/ia64/kernel/setup.c     |   35 ++---
 arch/ia64/mm/discontig.c     |  297 +++++++++++++++++++------------------------
 arch/ia64/mm/init.c          |  183 ++++++++++++--------------
 include/asm-ia64/mmzone.h    |  144 +++-----------------
 include/asm-ia64/nodedata.h  |   39 +----
 include/asm-ia64/numa.h      |   16 ++
 include/asm-ia64/page.h      |   14 --
 include/asm-ia64/pgtable.h   |    4
 include/asm-ia64/processor.h |    2
 include/linux/mm.h           |    4
 mm/bootmem.c                 |   36 +++--
 mm/memory.c                  |    2
 mm/page_alloc.c              |    9 -
 14 files changed, 327 insertions(+), 498 deletions(-)

Thanks,
Jesse