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| author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2009-03-25 01:47:45 +0300 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-03-25 01:47:45 +0300 |
| commit | fbf2b1f9cfdb4e4b5d042839142ed19ff5d46679 (patch) | |
| tree | 3a17c02aa0cf9bdbed9aa479739974aa2416ecac /arch/arm/Kconfig | |
| parent | 9a38e989b8ce04923f919fc2a8a24eb07fb484e2 (diff) | |
| parent | 053a96ca11a9785a7e63fc89eed4514a6446ec58 (diff) | |
| download | linux-fbf2b1f9cfdb4e4b5d042839142ed19ff5d46679.tar.xz | |
Merge branch 'highmem' into devel
Diffstat (limited to 'arch/arm/Kconfig')
| -rw-r--r-- | arch/arm/Kconfig | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index cb4486ad0f72..e62b37a15a1d 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -939,6 +939,23 @@ config NODES_SHIFT default "2" depends on NEED_MULTIPLE_NODES +config HIGHMEM + bool "High Memory Support (EXPERIMENTAL)" + depends on MMU && EXPERIMENTAL + help + The address space of ARM processors is only 4 Gigabytes large + and it has to accommodate user address space, kernel address + space as well as some memory mapped IO. That means that, if you + have a large amount of physical memory and/or IO, not all of the + memory can be "permanently mapped" by the kernel. The physical + memory that is not permanently mapped is called "high memory". + + Depending on the selected kernel/user memory split, minimum + vmalloc space and actual amount of RAM, you may not need this + option which should result in a slightly faster kernel. + + If unsure, say n. + source "mm/Kconfig" config LEDS |