svn commit: r252261 - user/attilio/vmobj-readlock/sys/vm

[Attilio Rao]

Author: attilio
Date: Wed Jun 26 21:58:28 2013
New Revision: 252261
URL: http://svnweb.freebsd.org/changeset/base/252261

Log:
  Reintroduce a check that seems necessary for the time being.
  
  Sponsored by:	EMC / Isilon storage division
  Reported by:	pho

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

Modified: user/attilio/vmobj-readlock/sys/vm/vm_glue.c
==============================================================================
--- user/attilio/vmobj-readlock/sys/vm/vm_glue.c	Wed Jun 26 20:39:07 2013	(r252260)
+++ user/attilio/vmobj-readlock/sys/vm/vm_glue.c	Wed Jun 26 21:58:28 2013	(r252261)
@@ -551,7 +551,7 @@ vm_thread_swapin(struct thread *td)
 			for (k = i; k < j; k++)
 				ma[k] = vm_page_lookup(ksobj, k);
 			vm_page_busy_wunlock(ma[i]);
-		} else
+		} else if (vm_page_busy_wlocked(ma[i])
 			vm_page_busy_wunlock(ma[i]);
 	}
 	VM_OBJECT_WUNLOCK(ksobj);