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| author | Andrea Arcangeli <aarcange@redhat.com> | 2011-01-13 15:47:17 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-13 17:32:47 -0800 |
| commit | a664b2d8555c659127bf8fe049a58449d394a707 (patch) | |
| tree | 14771f4ab93a9dda98174f21e0361a77e2aebfa6 /mm/madvise.c | |
| parent | 1ddd6db43a08cba56c7ee920800980862086f1c3 (diff) | |
| download | lwn-a664b2d8555c659127bf8fe049a58449d394a707.tar.gz lwn-a664b2d8555c659127bf8fe049a58449d394a707.zip | |
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 'mm/madvise.c')
| -rw-r--r-- | mm/madvise.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/mm/madvise.c b/mm/madvise.c index ecde40a401c1..bbac126e03ed 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -72,7 +72,8 @@ static long madvise_behavior(struct vm_area_struct * vma, goto out; break; case MADV_HUGEPAGE: - error = hugepage_madvise(&new_flags); + case MADV_NOHUGEPAGE: + error = hugepage_madvise(&new_flags, behavior); if (error) goto out; break; @@ -290,6 +291,7 @@ madvise_behavior_valid(int behavior) #endif #ifdef CONFIG_TRANSPARENT_HUGEPAGE case MADV_HUGEPAGE: + case MADV_NOHUGEPAGE: #endif return 1; |