From: Andrew Morton <akpm@linux-foundation.org>
To: Will Deacon <will.deacon@arm.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
linux-arch@vger.kernel.org, mhocko@suse.cz,
Steve Capper <steve.capper@arm.com>,
Gerald Schaefer <gerald.schaefer@de.ibm.com>
Subject: Re: [PATCH 3/3] mm: Introduce HAVE_ARCH_TRANSPARENT_HUGEPAGE
Date: Thu, 13 Sep 2012 12:05:14 -0700 [thread overview]
Message-ID: <20120913120514.135d2c38.akpm@linux-foundation.org> (raw)
In-Reply-To: <1347382036-18455-4-git-send-email-will.deacon@arm.com>
On Tue, 11 Sep 2012 17:47:16 +0100
Will Deacon <will.deacon@arm.com> wrote:
> From: Steve Capper <steve.capper@arm.com>
>
> Different architectures have slightly different pre-requisites for supporting
> Transparent Huge Pages. To simplify the layout of mm/Kconfig, a new option
> HAVE_ARCH_TRANSPARENT_HUGEPAGE is introduced and set in each architecture's
> Kconfig file (at the moment x86, with ARM being set in a future patch).
>
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -1297,6 +1297,10 @@ config ILLEGAL_POINTER_VALUE
> default 0 if X86_32
> default 0xdead000000000000 if X86_64
>
> +config HAVE_ARCH_TRANSPARENT_HUGEPAGE
> + def_bool y
> + depends on MMU
> +
> source "mm/Kconfig"
>
> config HIGHPTE
> diff --git a/mm/Kconfig b/mm/Kconfig
> index d5c8019..3322342 100644
> --- a/mm/Kconfig
> +++ b/mm/Kconfig
> @@ -318,7 +318,7 @@ config NOMMU_INITIAL_TRIM_EXCESS
>
> config TRANSPARENT_HUGEPAGE
> bool "Transparent Hugepage Support"
> - depends on X86 && MMU
> + depends on HAVE_ARCH_TRANSPARENT_HUGEPAGE
> select COMPACTION
> help
> Transparent Hugepages allows the kernel to use huge pages and
We need to talk with Gerald concerning
http://ozlabs.org/~akpm/mmotm/broken-out/thp-x86-introduce-have_arch_transparent_hugepage.patch
I did this. Please check.
From: Steve Capper <steve.capper@arm.com>
Subject: mm: introduce HAVE_ARCH_TRANSPARENT_HUGEPAGE
Different architectures have slightly different pre-requisites for
supporting Transparent Huge Pages. To simplify the layout of mm/Kconfig,
a new option HAVE_ARCH_TRANSPARENT_HUGEPAGE is introduced and set in each
architecture's Kconfig file (at the moment x86, with ARM being set in a
future patch).
Signed-off-by: Steve Capper <steve.capper@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Kirill A. Shutemov <kirill@shutemov.name>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
arch/x86/Kconfig | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff -puN arch/x86/Kconfig~mm-introduce-have_arch_transparent_hugepage arch/x86/Kconfig
--- a/arch/x86/Kconfig~mm-introduce-have_arch_transparent_hugepage
+++ a/arch/x86/Kconfig
@@ -83,7 +83,6 @@ config X86
select IRQ_FORCED_THREADING
select USE_GENERIC_SMP_HELPERS if SMP
select HAVE_BPF_JIT if X86_64
- select HAVE_ARCH_TRANSPARENT_HUGEPAGE
select CLKEVT_I8253
select ARCH_HAVE_NMI_SAFE_CMPXCHG
select GENERIC_IOMAP
@@ -1330,6 +1329,10 @@ config ILLEGAL_POINTER_VALUE
default 0 if X86_32
default 0xdead000000000000 if X86_64
+config HAVE_ARCH_TRANSPARENT_HUGEPAGE
+ def_bool y
+ depends on MMU
+
source "mm/Kconfig"
config HIGHPTE
--
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next prev parent reply other threads:[~2012-09-13 19:05 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-11 16:47 [PATCH 0/3] Minor changes to common hugetlb code for ARM Will Deacon
2012-09-11 16:47 ` [PATCH 1/3] mm: thp: Fix the pmd_clear() arguments in pmdp_get_and_clear() Will Deacon
2012-09-11 17:12 ` Kirill A. Shutemov
2012-09-12 15:30 ` Michal Hocko
2012-09-11 16:47 ` [PATCH 2/3] mm: thp: Fix the update_mmu_cache() last argument passing in mm/huge_memory.c Will Deacon
2012-09-11 17:38 ` Kirill A. Shutemov
2012-09-12 15:40 ` Michal Hocko
2012-09-12 15:51 ` Catalin Marinas
2012-09-15 13:38 ` Ralf Baechle
2012-09-18 19:33 ` Andrew Morton
2012-09-19 9:12 ` Catalin Marinas
2012-09-19 15:53 ` Ralf Baechle
2012-09-20 12:44 ` Will Deacon
2012-09-20 19:32 ` David Miller
2012-09-11 16:47 ` [PATCH 3/3] mm: Introduce HAVE_ARCH_TRANSPARENT_HUGEPAGE Will Deacon
2012-09-11 17:41 ` Kirill A. Shutemov
2012-09-12 15:32 ` Michal Hocko
2012-09-12 18:06 ` Chris Metcalf
2012-09-12 18:10 ` Will Deacon
2012-09-13 19:05 ` Andrew Morton [this message]
2012-09-13 21:26 ` Will Deacon
2012-09-13 21:27 ` Stephen Rothwell
2012-09-13 21:40 ` Andrew Morton
2012-09-12 15:27 ` [PATCH 0/3] Minor changes to common hugetlb code for ARM Michal Hocko
2012-09-12 15:55 ` Will Deacon
2012-09-13 12:22 ` Michal Hocko
2012-09-13 0:12 ` Andrea Arcangeli
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