linux-kernel - [PATCH v4 2/2] arm64 Kconfig: Select gigantic page

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Message-ID: <1475227569-63446-3-git-send-email-xieyisheng1@huawei.com>
Date:   Fri, 30 Sep 2016 17:26:09 +0800
From:   Yisheng Xie <xieyisheng1@...wei.com>
To:     <akpm@...ux-foundation.org>, <mhocko@...nel.org>
CC:     <guohanjun@...wei.com>, <linux-mm@...ck.org>,
        <linux-kernel@...r.kernel.org>, <will.deacon@....com>,
        <dave.hansen@...el.com>, <sudeep.holla@....com>,
        <catalin.marinas@....com>, <mark.rutland@....com>,
        <robh+dt@...nel.org>, <linux-arm-kernel@...ts.infradead.org>,
        <mike.kravetz@...cle.com>, <n-horiguchi@...jp.nec.com>
Subject: [PATCH v4 2/2] arm64 Kconfig: Select gigantic page

Arm64 supports gigantic page after
commit 084bd29810a5 ("ARM64: mm: HugeTLB support.")
however, it can only be allocated at boottime and can't be freed.

This patch selects ARCH_HAS_GIGANTIC_PAGE to make gigantic pages
can be allocated and freed at runtime for arch arm64.

Acked-by: Michal Hocko <mhocko@...e.com>
Acked-by: Catalin Marinas <catalin.marinas@....com>
Signed-off-by: Yisheng Xie <xieyisheng1@...wei.com>
---
 arch/arm64/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index bc3f00f..92217f6 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -9,6 +9,7 @@ config ARM64
 	select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
 	select ARCH_HAS_ELF_RANDOMIZE
 	select ARCH_HAS_GCOV_PROFILE_ALL
+	select ARCH_HAS_GIGANTIC_PAGE
 	select ARCH_HAS_KCOV
 	select ARCH_HAS_SG_CHAIN
 	select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
-- 
1.7.12.4