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From: Steve Capper <steve.capper@linaro.org>
To: linux-mm@kvack.org, x86@kernel.org, linux-arch@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org
Cc: Michal Hocko <mhocko@suse.cz>, Ken Chen <kenchen@google.com>,
	Mel Gorman <mgorman@suse.de>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will.deacon@arm.com>,
	patches@linaro.org, Steve Capper <steve.capper@linaro.org>
Subject: [RFC PATCH v2 10/11] ARM64: mm: Raise MAX_ORDER for 64KB pages and THP.
Date: Wed,  8 May 2013 10:52:42 +0100	[thread overview]
Message-ID: <1368006763-30774-11-git-send-email-steve.capper@linaro.org> (raw)
In-Reply-To: <1368006763-30774-1-git-send-email-steve.capper@linaro.org>

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(+)

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

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  parent reply	other threads:[~2013-05-08  9:53 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-05-08  9:52 [RFC PATCH v2 00/11] HugeTLB and THP support for ARM64 Steve Capper
2013-05-08  9:52 ` [RFC PATCH v2 01/11] mm: hugetlb: Copy huge_pmd_share from x86 to mm Steve Capper
2013-05-08  9:52 ` [RFC PATCH v2 02/11] x86: mm: Remove x86 version of huge_pmd_share Steve Capper
2013-05-08  9:52 ` [RFC PATCH v2 03/11] mm: hugetlb: Copy general hugetlb code from x86 to mm Steve Capper
2013-05-08  9:52 ` [RFC PATCH v2 04/11] x86: mm: Remove general hugetlb code from x86 Steve Capper
2013-05-08  9:52 ` [RFC PATCH v2 05/11] mm: thp: Correct the HPAGE_PMD_ORDER check Steve Capper
2013-05-08 12:44   ` Kirill A. Shutemov
2013-05-08 12:03     ` Steve Capper
2013-05-08  9:52 ` [RFC PATCH v2 06/11] ARM64: mm: Restore memblock limit when map_mem finished Steve Capper
2013-05-16 13:52   ` Catalin Marinas
2013-05-08  9:52 ` [RFC PATCH v2 07/11] ARM64: mm: Make PAGE_NONE pages read only and no-execute Steve Capper
2013-05-08 16:43   ` Will Deacon
2013-05-09  8:27     ` Steve Capper
2013-05-08  9:52 ` [RFC PATCH v2 08/11] ARM64: mm: Swap PTE_FILE and PTE_PROT_NONE bits Steve Capper
2013-05-08 16:17   ` Christopher Covington
2013-05-09  8:15     ` Steve Capper
2013-05-08 16:40   ` Will Deacon
2013-05-09  8:22     ` Steve Capper
2013-05-16 14:58   ` Catalin Marinas
2013-05-08  9:52 ` [RFC PATCH v2 09/11] ARM64: mm: HugeTLB support Steve Capper
2013-05-16 14:32   ` Catalin Marinas
2013-05-17  8:41     ` Steve Capper
2013-05-08  9:52 ` Steve Capper [this message]
2013-05-16 14:59   ` [RFC PATCH v2 10/11] ARM64: mm: Raise MAX_ORDER for 64KB pages and THP Catalin Marinas
2013-05-08  9:52 ` [RFC PATCH v2 11/11] ARM64: mm: THP support Steve Capper
2013-05-16 15:01   ` Catalin Marinas

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