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Revert "Ignore madvise(MADV_WILLNEED) for hugetlbfs-backed regions" 

This reverts commit a425a638c8.

Now that the previous commit removed the "readpage" actor for hugetlb
files, read-ahead will no longer mess up the mapping, and there's no
longer any reason to treat hugetlbfs mappings specially.

Tested-and-acked-by: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Linus Torvalds 2009-05-13 08:29:12 -07:00
parent f2deae9d4e
commit 0f18132828
1 changed files with 0 additions and 8 deletions
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8
mm/madvise.c
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@ -112,14 +112,6 @@ static long madvise_willneed(struct vm_area_struct * vma,
if (!file)
return -EBADF;
/*
* Page cache readahead assumes page cache pages are order-0 which
* is not the case for hugetlbfs. Do not give a bad return value
* but ignore the advice.
*/
if (vma->vm_flags & VM_HUGETLB)
return 0;
if (file->f_mapping->a_ops->get_xip_mem) {
/* no bad return value, but ignore advice */
return 0;