[Midnightbsd-cvs] src [8116] trunk/sys/vm/vm_pageout.c: address a race condition

[laffer1 at midnightbsd.org]

Revision: 8116
          http://svnweb.midnightbsd.org/src/?rev=8116
Author:   laffer1
Date:     2016-09-16 16:35:02 -0400 (Fri, 16 Sep 2016)
Log Message:
-----------
address a race condition

Modified Paths:
--------------
    trunk/sys/vm/vm_pageout.c

Modified: trunk/sys/vm/vm_pageout.c
===================================================================
--- trunk/sys/vm/vm_pageout.c	2016-09-16 20:34:31 UTC (rev 8115)
+++ trunk/sys/vm/vm_pageout.c	2016-09-16 20:35:02 UTC (rev 8116)
@@ -999,9 +999,9 @@
 			 * Those objects are in a "rundown" state.
 			 */
 			if (!swap_pageouts_ok || (object->flags & OBJ_DEAD)) {
+				vm_page_lock_queues();
 				vm_page_unlock(m);
 				VM_OBJECT_UNLOCK(object);
-				vm_page_lock_queues();
 				queues_locked = TRUE;
 				vm_page_requeue(m);
 				goto relock_queues;