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author | Michael Ellerman <michael@ellerman.id.au> | 2008-03-12 07:03:24 (GMT) |
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committer | Paul Mackerras <paulus@samba.org> | 2008-03-12 23:10:26 (GMT) |
commit | 31bf111944e31b64a7b692f9d660f71c5ff3d419 (patch) | |
tree | d35dd19288e3bc3529c1ccb00aacc74690f97776 /arch/powerpc/mm | |
parent | 07dc42f632e335a03c0e780805dc9dc141f83e63 (diff) | |
download | linux-fsl-qoriq-31bf111944e31b64a7b692f9d660f71c5ff3d419.tar.xz |
[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>
Diffstat (limited to 'arch/powerpc/mm')
-rw-r--r-- | arch/powerpc/mm/hash_utils_64.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c index 32f4161..590f1f67 100644 --- a/arch/powerpc/mm/hash_utils_64.c +++ b/arch/powerpc/mm/hash_utils_64.c @@ -506,10 +506,10 @@ void __init htab_initialize(void) } else { /* Find storage for the HPT. Must be contiguous in * the absolute address space. On cell we want it to be - * in the first 1 Gig. + * in the first 2 Gig so we can use it for IOMMU hacks. */ if (machine_is(cell)) - limit = 0x40000000; + limit = 0x80000000; else limit = 0; |