diff options
| author | David S. Miller <davem@sunset.davemloft.net> | 2007-03-15 01:47:01 -0400 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-04-26 04:55:22 -0400 |
| commit | d78d0891d3dd976a2fb707c6c691d9cd5ed60727 (patch) | |
| tree | 75a1f09a7f316c5cfd6ab3d1dc0e48e89320a200 /arch/sparc64 | |
| parent | 43bed127376ff2ef9c268cf6688a43d0fbed2ff4 (diff) | |
[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')
| -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 | |||
| 220 | 220 | ||
| 221 | config ARCH_SPARSEMEM_DEFAULT | 221 | config ARCH_SPARSEMEM_DEFAULT |
| 222 | def_bool y | 222 | def_bool y |
| 223 | select SPARSEMEM_STATIC | ||
| 223 | 224 | ||
| 224 | config LARGE_ALLOCS | 225 | config LARGE_ALLOCS |
| 225 | def_bool y | 226 | def_bool y |