svn commit: r252253 - user/attilio/vmobj-readlock/sys/vm

[Attilio Rao]

Author: attilio
Date: Wed Jun 26 17:59:00 2013
New Revision: 252253
URL: http://svnweb.freebsd.org/changeset/base/252253

Log:
  Check-in a fix to the runlock algorithm that should have been there
  already.
  
  Sponsored by:	EMC / Isilon storage division

Modified:
  user/attilio/vmobj-readlock/sys/vm/vm_page.c

Modified: user/attilio/vmobj-readlock/sys/vm/vm_page.c
==============================================================================
--- user/attilio/vmobj-readlock/sys/vm/vm_page.c	Wed Jun 26 12:57:21 2013	(r252252)
+++ user/attilio/vmobj-readlock/sys/vm/vm_page.c	Wed Jun 26 17:59:00 2013	(r252253)
@@ -527,7 +527,7 @@ vm_page_busy_runlock(vm_page_t m)
 		    ("vm_page_busy_runlock: invalid lock state for waiters"));
 
 		vm_page_lock(m);
-		if (atomic_cmpset_int(&m->busy_lock, x, VPB_UNLOCKED)) {
+		if (!atomic_cmpset_int(&m->busy_lock, x, VPB_UNLOCKED)) {
 			vm_page_unlock(m);
 			continue;
 		}