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Commit c3dce2d8 authored by Nick Piggin's avatar Nick Piggin Committed by Linus Torvalds
Browse files

[PATCH] mm: comment rmap 



Just be clear that VM_RESERVED pages here are a bug, and the test is not there
because they are expected.

Signed-off-by: default avatarNick Piggin <npiggin@suse.de>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 6e21c8f1

mm/rmap.c

+2 −0
Original line number Diff line number Diff line
@@ -527,6 +527,8 @@ static int try_to_unmap_one(struct page *page, struct vm_area_struct *vma) 
	 * If the page is mlock()d, we cannot swap it out.

	 * If it's recently referenced (perhaps page_referenced

	 * skipped over this mm) then we should reactivate it.

	 *

	 * Pages belonging to VM_RESERVED regions should not happen here.

	 */

	if ((vma->vm_flags & (VM_LOCKED|VM_RESERVED)) ||

			ptep_clear_flush_young(vma, address, pte)) {