On Monday 18 June 2007, Jimi Xenidis wrote:

=20
The following change set:
=A0 =A0http://git.kernel.org/?p=3Dlinux/kernel/git/paulus/=20
powerpc.git;a=3Dcommit;h=3D261efc3f178c8c5b55d76208aee1f39ce247f723
=20
setting CONFIG_PS3_USE_LPAR_ADDR (which is the default for PS3) =A0
changes increases MAX_PHYSADDR_BITS =A0from 44 to 47 which makes the =A0
array 8 time bigger and takes way longer for sparse_init() to run on =A0
simulator.
=20
Is this really the right approach?
Cell is actually 42 so could not the special address space be 43 or 44?

Unfortunately, the hypervisor chooses the addresses where things get
mapped, and since they are guest-real, there is no hard limit where
the hypervisor puts them, like the 42 bit limit on bare metal.

I guess this will improve if we get virt_mem_map support on powerpc,
but I'm not sure if that's currently being worked on.

	Arnd <><