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thp: kvm mmu transparent hugepage support

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This should work for both hugetlbfs and transparent hugepages.

[akpm@linux-foundation.org: bring forward PageTransCompound() addition for bisectability]
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Avi Kivity <avi@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andrea Arcangeli 2011-01-13 15:46:48 -08:00 • committed by Linus Torvalds
parent 47ad8475c0
commit 936a5fe6e6
4 changed files with 125 additions and 19 deletions
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12
include/linux/page-flags.h
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@ -409,6 +409,18 @@ static inline void ClearPageCompound(struct page *page)
#endif /* !PAGEFLAGS_EXTENDED */
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
static inline int PageTransCompound(struct page *page)
{
return PageCompound(page);
}
#else
static inline int PageTransCompound(struct page *page)
{
return 0;
}
#endif
#ifdef CONFIG_MMU
#define __PG_MLOCKED (1 << PG_mlocked)
#else