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authorRussell King <rmk+kernel@arm.linux.org.uk>2015-06-25 12:49:45 +0300
committerRussell King <rmk+kernel@arm.linux.org.uk>2015-06-29 16:33:14 +0300
commitb4d103d1a45fed0da2f31c905eb5e053c84a41c6 (patch)
treeb833202fc9d4656b0bd1762e2abc73ec2e9fbeee /arch/arm
parente6ae32c343981a50aa07c34767f2a967cc920edc (diff)
downloadlinux-b4d103d1a45fed0da2f31c905eb5e053c84a41c6.tar.xz
ARM: add help text for HIGHPTE configuration entry
Add some help text for the HIGHPTE configuration entry. This comes from the x86 entry, but reworded to be more a more accurate description of what this option does. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/Kconfig6
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 45df48ba0b12..cc0ea0c6cfc9 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1661,6 +1661,12 @@ config HIGHMEM
config HIGHPTE
bool "Allocate 2nd-level pagetables from highmem"
depends on HIGHMEM
+ help
+ The VM uses one page of physical memory for each page table.
+ For systems with a lot of processes, this can use a lot of
+ precious low memory, eventually leading to low memory being
+ consumed by page tables. Setting this option will allow
+ user-space 2nd level page tables to reside in high memory.
config HW_PERF_EVENTS
bool "Enable hardware performance counter support for perf events"