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| author | Anton Altaparmakov <aia21@cantab.net> | 2006-02-24 09:06:36 +0000 |
|---|---|---|
| committer | Anton Altaparmakov <aia21@cantab.net> | 2006-02-24 09:06:36 +0000 |
| commit | fab8d6ddf6dee2608869005d45fe97f70e4f5bdd (patch) | |
| tree | fecf566e03a87b2a44c7f3363ddb5c0d4bebdca7 /mm/madvise.c | |
| parent | 64419d93a5906600af5817ad0cae3c6ecf7fb389 (diff) | |
| parent | f52ee1410d563cd409b08822492273a5bc235821 (diff) | |
| download | blackbird-op-linux-fab8d6ddf6dee2608869005d45fe97f70e4f5bdd.tar.gz blackbird-op-linux-fab8d6ddf6dee2608869005d45fe97f70e4f5bdd.zip | |
Merge branch 'master' of /home/src/linux-2.6/
Diffstat (limited to 'mm/madvise.c')
| -rw-r--r-- | mm/madvise.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/mm/madvise.c b/mm/madvise.c index ae0ae3ea299a..af3d573b0141 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -22,16 +22,23 @@ static long madvise_behavior(struct vm_area_struct * vma, struct mm_struct * mm = vma->vm_mm; int error = 0; pgoff_t pgoff; - int new_flags = vma->vm_flags & ~VM_READHINTMASK; + int new_flags = vma->vm_flags; switch (behavior) { + case MADV_NORMAL: + new_flags = new_flags & ~VM_RAND_READ & ~VM_SEQ_READ; + break; case MADV_SEQUENTIAL: - new_flags |= VM_SEQ_READ; + new_flags = (new_flags & ~VM_RAND_READ) | VM_SEQ_READ; break; case MADV_RANDOM: - new_flags |= VM_RAND_READ; + new_flags = (new_flags & ~VM_SEQ_READ) | VM_RAND_READ; break; - default: + case MADV_DONTFORK: + new_flags |= VM_DONTCOPY; + break; + case MADV_DOFORK: + new_flags &= ~VM_DONTCOPY; break; } @@ -177,6 +184,12 @@ madvise_vma(struct vm_area_struct *vma, struct vm_area_struct **prev, long error; switch (behavior) { + case MADV_DOFORK: + if (vma->vm_flags & VM_IO) { + error = -EINVAL; + break; + } + case MADV_DONTFORK: case MADV_NORMAL: case MADV_SEQUENTIAL: case MADV_RANDOM: |
