tree d35dd19288e3bc3529c1ccb00aacc74690f97776
parent 07dc42f632e335a03c0e780805dc9dc141f83e63
author Michael Ellerman <michael@ellerman.id.au> 1205305404 +1100
committer Paul Mackerras <paulus@samba.org> 1205363426 +1100

[POWERPC] Fix large hash table allocation on Cell blades

My recent hack to allocate the hash table under 1GB on cell was poorly
tested, *cough*. It turns out on blades with large amounts of memory we
fail to allocate the hash table at all. This is because RTAS has been
instantiated just below 768MB, and 0-x MB are used by the kernel,
leaving no areas that are both large enough and also naturally-aligned.

For the cell IOMMU hack the page tables must be under 2GB, so use that
as the limit instead. This has been tested on real hardware and boots
happily.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>