| Subject | [PATCH 15 of 66] config_transparent_hugepage | Date | Wed, 03 Nov 2010 16:27:50 +0100 | From | Andrea Arcangeli <> |
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From: Andrea Arcangeli <aarcange@redhat.com>
Add config option.
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Acked-by: Rik van Riel <riel@redhat.com> Acked-by: Mel Gorman <mel@csn.ul.ie> ---
diff --git a/fs/Kconfig b/fs/Kconfig --- a/fs/Kconfig +++ b/fs/Kconfig @@ -147,7 +147,7 @@ config HUGETLBFS If unsure, say N. config HUGETLB_PAGE - def_bool HUGETLBFS + def_bool HUGETLBFS || TRANSPARENT_HUGEPAGE source "fs/configfs/Kconfig" diff --git a/mm/Kconfig b/mm/Kconfig --- a/mm/Kconfig +++ b/mm/Kconfig @@ -302,6 +302,20 @@ config NOMMU_INITIAL_TRIM_EXCESS See Documentation/nommu-mmap.txt for more information. +config TRANSPARENT_HUGEPAGE + bool "Transparent Hugepage Support" if EMBEDDED + depends on X86_64 && MMU + default y + help + Transparent Hugepages allows the kernel to use huge pages and + huge tlb transparently to the applications whenever possible. + This feature can improve computing performance to certain + applications by speeding up page faults during memory + allocation, by reducing the number of tlb misses and by speeding + up the pagetable walking. + + If memory constrained on embedded, you may want to say N. + # # UP and nommu archs use km based percpu allocator #
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