thp: transparent hugepage config choice

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Allow to choose between the always|madvise default for page faults and
khugepaged at config time.  madvise guarantees zero risk of higher memory
footprint for applications (applications using madvise(MADV_HUGEPAGE)
won't risk to use any more memory by backing their virtual regions with
hugepages).

Initially set the default to N and don't depend on EMBEDDED.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
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 15:47:07 -08:00 • committed by Linus Torvalds

parent ce83d2174e

commit 13ece886d9

2 changed files with 30 additions and 2 deletions

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27

mm/Kconfig

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5

mm/huge_memory.c

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