[PATCH 10/11] ARM64: mm: Raise MAX_ORDER for 64KB pages and THP.
From: Steve Capper <hidden>
Date: 2013-05-23 17:08:27
Also in:
linux-arch, linux-mm
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
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 <redacted> Acked-by: Catalin Marinas <catalin.marinas@arm.com> --- arch/arm64/Kconfig | 5 +++++ 1 file changed, 5 insertions(+)
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"
--
1.8.1.4