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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 /arch/sparc64/Kconfig | |
| 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 'arch/sparc64/Kconfig')
| -rw-r--r-- | arch/sparc64/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/sparc64/Kconfig b/arch/sparc64/Kconfig index 51c87fdd998c..590a41b864b9 100644 --- a/arch/sparc64/Kconfig +++ b/arch/sparc64/Kconfig @@ -220,6 +220,7 @@ config ARCH_SPARSEMEM_ENABLE config ARCH_SPARSEMEM_DEFAULT def_bool y + select SPARSEMEM_STATIC config LARGE_ALLOCS def_bool y |