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authorSteve Capper <steve.capper@linaro.org>2013-04-25 15:19:21 +0100
committerMark Brown <broonie@linaro.org>2014-05-09 12:02:47 +0100
commit74c50894f33d4bf349499e8f6ac75db3dd1ff3ff (patch)
treec6ee13dd0d967493031bad688117ec0eaa9e0984
parent597173f474cb5a28b4c9a1dbf865ac002c7e5010 (diff)
downloadlinux-linaro-stable-74c50894f33d4bf349499e8f6ac75db3dd1ff3ff.tar.gz
ARM64: mm: Raise MAX_ORDER for 64KB pages and THP.
The buddy allocator has a default MAX_ORDER of 11, which is too low to allocate enough memory for 512MB Transparent HugePages if our base page size is 64KB. This patch introduces MAX_ZONE_ORDER and sets it to 14 when 64KB pages are used in conjuction with THP, otherwise the default value of 11 is used. Signed-off-by: Steve Capper <steve.capper@linaro.org> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
-rw-r--r--arch/arm64/Kconfig5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index cd6eca8..10607d6 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -191,6 +191,11 @@ config ARCH_WANT_HUGE_PMD_SHARE
source "mm/Kconfig"
+config FORCE_MAX_ZONEORDER
+ int
+ default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
+ default "11"
+
endmenu
menu "Boot options"