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@xxxxxxxxxx> --- arch/arm64/Kconfig | 5 +++++ 1 file changed, 5 insertions(+) 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" -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
