Commit 0f181328 authored May 13, 2009 by Linus Torvalds

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



This reverts commit a425a638.

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>

parent f2deae9d

mm/madvise.c

+0 −8

Original line number	Diff line number	Diff line
		@@ -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;