Commit 28bd6578 authored Jan 25, 2011 by Minchan Kim Committed by Linus Torvalds Jan 26, 2011

mm: migration: clarify migrate_pages() comment



Callers of migrate_pages should putback_lru_pages to return pages
isolated to LRU or free list.  Now comment is rather confusing.  It says
caller always have to call it.

It is more clear to point out that the caller has to call it if
migrate_pages's return value isn't zero.

Signed-off-by: Minchan Kim <minchan.kim@gmail.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 33a93877

mm/migrate.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -888,7 +888,7 @@ static int unmap_and_move_huge_page(new_page_t get_new_page,
		* are movable anymore because to has become empty
		* or no retryable pages exist anymore.
		* Caller should call putback_lru_pages to return pages to the LRU
		* or free list.
		* or free list only if ret != 0.
		*
		* Return: Number of pages not migrated or error code.
		*/