From b4d103d1a45fed0da2f31c905eb5e053c84a41c6 Mon Sep 17 00:00:00 2001 From: Russell King Date: Thu, 25 Jun 2015 10:49:45 +0100 Subject: [PATCH] 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 --- arch/arm/Kconfig | 6 ++++++ 1 file changed, 6 insertions(+) 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" -- 2.20.1