Re: [PATCH 3/3] mm: Introduce HAVE_ARCH_TRANSPARENT_HUGEPAGE
From: Andrew Morton <akpm@linux-foundation.org>
Date: 2012-09-13 19:05:19
Also in:
linux-mm, lkml
On Tue, 11 Sep 2012 17:47:16 +0100 Will Deacon [off-list ref] wrote:
quoted hunk ↗ jump to hunk
From: Steve Capper <redacted> 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 HIGHPTEdiff --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 <redacted> 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 <redacted> Signed-off-by: Will Deacon <redacted> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Kirill A. Shutemov <redacted> Cc: Michal Hocko <redacted> Cc: Gerald Schaefer <redacted> Cc: Andrea Arcangeli <redacted> 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