Merge branches 'fixes' and 'ioremap' into for-linus

[linux-drm-fsl-dcu.git] / arch / arm / Kconfig

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index a750c1425c3a64e8a1f2d138b8bc4d9fd2224b8e..1c5021002fe40b06a2e57daad459bf1b4181b822 100644 (file)
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1693,6 +1693,12 @@ 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"