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Commit f3ab2636 authored by Bob Liu's avatar Bob Liu Committed by Linus Torvalds
Browse files

mm: do_migrate_range: reduce list_empty() check 



Simple code for reducing list_empty(&source) check.

Signed-off-by: default avatarBob Liu <lliubbo@gmail.com>
Acked-by: default avatarKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: default avatarWu Fengguang <fengguang.wu@intel.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 809c4449

mm/memory_hotplug.c

+9 −12
Original line number Diff line number Diff line
@@ -705,24 +705,21 @@ do_migrate_range(unsigned long start_pfn, unsigned long end_pfn) 
			   check this again here. */

			if (page_count(page)) {

				not_managed++;

				ret = -EBUSY;

				break;

			}

		}

	}

	ret = -EBUSY;

	if (!list_empty(&source)) {

		if (not_managed) {

		if (!list_empty(&source))

			putback_lru_pages(&source);

			goto out;

		}

	ret = 0;

	if (list_empty(&source))

		goto out;

		/* this function returns # of failed pages */

		ret = migrate_pages(&source, hotremove_migrate_alloc, 0, 1);

		if (ret)

			putback_lru_pages(&source);



	}

out:

	return ret;

}