| Message ID | 1368006763-30774-11-git-send-email-steve.capper@linaro.org |
|---|---|
| State | Superseded |
| Headers | show |
On Wed, May 08, 2013 at 10:52:42AM +0100, Steve Capper wrote: > 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>
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 053533b..a5f76cf 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -196,6 +196,11 @@ 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"
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> --- arch/arm64/Kconfig | 5 +++++ 1 file changed, 5 insertions(+)