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Commit 354a3363 authored by Naoya Horiguchi's avatar Naoya Horiguchi Committed by Linus Torvalds
Browse files

mm/migrate: add comment about permanent failure path 



Let's add a comment about where the failed page goes to, which makes
code more readable.

Signed-off-by: default avatarNaoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: default avatarJoonsoo Kim <iamjoonsoo.kim@lge.com>
Acked-by: default avatarChristoph Lameter <cl@linux.com>
Reviewed-by: default avatarWanpeng Li <liwanp@linux.vnet.ibm.com>
Acked-by: default avatarRafael Aquini <aquini@redhat.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent aed0a0e3

mm/migrate.c

+6 −1
Original line number Diff line number Diff line
@@ -1125,7 +1125,12 @@ int migrate_pages(struct list_head *from, new_page_t get_new_page, 
				nr_succeeded++;

				break;

			default:

				/* Permanent failure */

				/*

				 * Permanent failure (-EBUSY, -ENOSYS, etc.):

				 * unlike -EAGAIN case, the failed page is

				 * removed from migration page list and not

				 * retried in the next outer loop.

				 */

				nr_failed++;

				break;

			}