[PATCH v8 1/4] sh: Advertise gigantic page support
From: Alexandre Ghiti <alex@ghiti.fr>
Date: 2019-03-27 06:37:57
Also in:
linux-arm-kernel, linux-mm, linux-s390, linux-sh, lkml, sparclinux
Subsystem:
superh, the rest · Maintainers:
Yoshinori Sato, Rich Felker, John Paul Adrian Glaubitz, Linus Torvalds
sh actually supports gigantic pages and selecting ARCH_HAS_GIGANTIC_PAGE allows it to allocate and free gigantic pages at runtime. At least sdk7786_defconfig exposes such a configuration with huge pages of 64MB, pages of 4KB and MAX_ORDER = 11: HPAGE_SHIFT (26) - PAGE_SHIFT (12) = 14 >= MAX_ORDER (11) Signed-off-by: Alexandre Ghiti <alex@ghiti.fr> --- arch/sh/Kconfig | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index b1c91ea9a958..0d9fb2468e0b 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig@@ -53,6 +53,7 @@ config SUPERH select HAVE_FUTEX_CMPXCHG if FUTEX select HAVE_NMI select NEED_SG_DMA_LENGTH + select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA help The SuperH is a RISC processor targeted for use in embedded systems
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2.20.1