Simple question. How do I allocate a page from highmem, that's still
within 32 bits? x86_64 has the DMA32 zone, but i386 has just HIGHMEM.
As most devices can't DMA above 32 bit, I have 3 GB of memory that's
not getting decent usage (or results in needless bouncing). What to do?

I tried just enabling CONFIG_DMA32 for i386, but there is some guard
against too many memory zones. I'm assuming this is there for a good
reason?

-- 
     -- Pierre Ossman

  Linux kernel, MMC maintainer        http://www.kernel.org
  rdesktop, core developer          http://www.rdesktop.org

  WARNING: This correspondence is being monitored by the
  Swedish government. Make sure your server uses encryption
  for SMTP traffic and consider using PGP for end-to-end
  encryption.