I now have a patch from upstream [0] that I've tested and can confirm
fixes this. Attached here for now. Awaiting details to access to
kernel.ubuntu.com so we can setup a PS3/cell tree to push to for review.

The other option we have is to change the following config options. See
[1] for explanation:

  CONFIG_SPARSEMEM_VMEMMAP=n
  CONFIG_FB_PS3_DEFAULT_SIZE_M=9
  CONFIG_PS3_USE_LPAR_ADDR=n

I've not tested these settings yet, and I'm still exploring what the
side effects would be if any. May recommend to the kernel team that we
move back to a ps3 specific custom kernel flavour.

[0] http://ozlabs.org/pipermail/cbe-oss-dev/2008-May/004704.html
[1] http://ozlabs.org/pipermail/cbe-oss-dev/2008-May/004721.html

** Attachment added: "0001-vmemmap-fixes-to-use-smaller-pages.patch"
   
http://launchpadlibrarian.net/14422175/0001-vmemmap-fixes-to-use-smaller-pages.patch

** Changed in: ubuntu-ps3-port
       Status: Incomplete => In Progress

** Changed in: linux (Ubuntu)
     Assignee: (unassigned) => Dan Munckton (munckfish)
       Status: New => In Progress

-- 
Only 86MB of RAM shown available on PS3 in Hardy
https://bugs.launchpad.net/bugs/220524
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