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thp: CONFIG_TRANSPARENT_HUGEPAGE

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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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Andrea Arcangeli 2011-01-13 15:46:39 -08:00 committed by Linus Torvalds
parent 59ff421631
commit 4c76d9d1fb
1 changed files with 14 additions and 0 deletions
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mm/Kconfig
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@ -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
#