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| author |   David S. Miller <davem@sunset.davemloft.net> | 2007-03-14 22:47:01 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-04-26 01:55:22 -0700 |
| commit | d78d0891d3dd976a2fb707c6c691d9cd5ed60727 (patch) | |
| tree | 75a1f09a7f316c5cfd6ab3d1dc0e48e89320a200 /include/asm-sparc64 | |
| parent | [SPARC64]: Use DECLARE_BITMAP in struct pci_iommu. (diff) | |
| download | linux-dev-d78d0891d3dd976a2fb707c6c691d9cd5ed60727.tar.xz linux-dev-d78d0891d3dd976a2fb707c6c691d9cd5ed60727.zip | |
[SPARC64]: Use SPARSEMEM_STATIC
Decrease the SECTION_SIZE_BITS --> MAX_PHYSADDR_BITS
range a little bit.
The cost of going to SPARSEMEM_STATIC becomes 8K of BSS space, and in
return we save a pointer dereferences on every page struct lookup.
Even better we hit the main kernel image for the base address which is
in a hugepage locked TLB entry.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/asm-sparc64')
| -rw-r--r-- | include/asm-sparc64/sparsemem.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/include/asm-sparc64/sparsemem.h b/include/asm-sparc64/sparsemem.h index ed5c9d8541e2..411e0e255cf3 100644 --- a/include/asm-sparc64/sparsemem.h +++ b/include/asm-sparc64/sparsemem.h @@ -3,9 +3,9 @@ #ifdef __KERNEL__ -#define SECTION_SIZE_BITS 26 -#define MAX_PHYSADDR_BITS 42 -#define MAX_PHYSMEM_BITS 42 +#define SECTION_SIZE_BITS 31 +#define MAX_PHYSADDR_BITS 41 +#define MAX_PHYSMEM_BITS 41 #endif /* !(__KERNEL__) */ |