From: Steve Capper Date: Thu, 25 Apr 2013 14:19:21 +0000 (+0100) Subject: ARM64: mm: Raise MAX_ORDER for 64KB pages and THP. X-Git-Tag: firefly_0821_release~176^2~5767^2~1^2~1 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=d03bb1455f3a2804539ed27047fd3b073fdeb3e0;p=firefly-linux-kernel-4.4.55.git 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 Acked-by: Catalin Marinas --- diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index cd6eca84a21c..10607d63b945 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"