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authorGeoff Levand <geoffrey.levand@am.sony.com>2007-12-17 16:19:53 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-12-17 19:28:16 -0800
commita5ee6daa525c04079baee6f393c0b2dab3f61253 (patch)
tree5024bdedd14111e3cf6723a41390b2f80dec8bfd /mm/Kconfig
parent2e12a7fb0d79d011ff9e0b09b53ca4438e5604de (diff)
downloadconfigs-a5ee6daa525c04079baee6f393c0b2dab3f61253.tar.gz
sparsemem: make SPARSEMEM_VMEMMAP selectable
SPARSEMEM_VMEMMAP needs to be a selectable config option to support building the kernel both with and without sparsemem vmemmap support. This selection is desirable for platforms which could be configured one way for platform specific builds and the other for multi-platform builds. Signed-off-by: Miguel Botón <mboton@gmail.com> Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com> Acked-by: Yasunori Goto <y-goto@jp.fujitsu.com> Cc: Christoph Lameter <clameter@sgi.com> Cc: Andy Whitcroft <apw@shadowen.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/Kconfig')
-rw-r--r--mm/Kconfig15
1 files changed, 7 insertions, 8 deletions
diff --git a/mm/Kconfig b/mm/Kconfig
index c070ec0c15b..9ef97417a0b 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -112,18 +112,17 @@ config SPARSEMEM_EXTREME
def_bool y
depends on SPARSEMEM && !SPARSEMEM_STATIC
-#
-# SPARSEMEM_VMEMMAP uses a virtually mapped mem_map to optimise pfn_to_page
-# and page_to_pfn. The most efficient option where kernel virtual space is
-# not under pressure.
-#
config SPARSEMEM_VMEMMAP_ENABLE
def_bool n
config SPARSEMEM_VMEMMAP
- bool
- depends on SPARSEMEM
- default y if (SPARSEMEM_VMEMMAP_ENABLE)
+ bool "Sparse Memory virtual memmap"
+ depends on SPARSEMEM && SPARSEMEM_VMEMMAP_ENABLE
+ default y
+ help
+ SPARSEMEM_VMEMMAP uses a virtually mapped memmap to optimise
+ pfn_to_page and page_to_pfn operations. This is the most
+ efficient option when sufficient kernel resources are available.
# eventually, we can have this option just 'select SPARSEMEM'
config MEMORY_HOTPLUG