diff options
| author | Andrea Arcangeli <aarcange@redhat.com> | 2011-01-13 18:47:17 -0500 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-13 20:32:47 -0500 |
| commit | a664b2d8555c659127bf8fe049a58449d394a707 (patch) | |
| tree | 14771f4ab93a9dda98174f21e0361a77e2aebfa6 /include/linux/mm.h | |
| parent | 1ddd6db43a08cba56c7ee920800980862086f1c3 (diff) | |
thp: madvise(MADV_NOHUGEPAGE)
Add madvise MADV_NOHUGEPAGE to mark regions that are not important to be
hugepage backed. Return -EINVAL if the vma is not of an anonymous type,
or the feature isn't built into the kernel. Never silently return
success.
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>
Diffstat (limited to 'include/linux/mm.h')
| -rw-r--r-- | include/linux/mm.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index ce97a2bb0b19..956a35532f47 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h | |||
| @@ -83,6 +83,7 @@ extern unsigned int kobjsize(const void *objp); | |||
| 83 | #define VM_GROWSUP 0x00000200 | 83 | #define VM_GROWSUP 0x00000200 |
| 84 | #else | 84 | #else |
| 85 | #define VM_GROWSUP 0x00000000 | 85 | #define VM_GROWSUP 0x00000000 |
| 86 | #define VM_NOHUGEPAGE 0x00000200 /* MADV_NOHUGEPAGE marked this vma */ | ||
| 86 | #endif | 87 | #endif |
| 87 | #define VM_PFNMAP 0x00000400 /* Page-ranges managed without "struct page", just pure PFN */ | 88 | #define VM_PFNMAP 0x00000400 /* Page-ranges managed without "struct page", just pure PFN */ |
| 88 | #define VM_DENYWRITE 0x00000800 /* ETXTBSY on write attempts.. */ | 89 | #define VM_DENYWRITE 0x00000800 /* ETXTBSY on write attempts.. */ |