- Acquire the vm_object's lock when performing vm_object_page_clean().

 - Add a parameter to vm_pageout_flush() that tells vm_pageout_flush()
   whether its caller has locked the vm_object.  (This is a temporary
   measure to bootstrap vm_object locking.)

1 files changed, 2 insertions, 0 deletions

diff --git a/sys/kern/vfs_subr.c b/sys/kern/vfs_subr.c
index b2bee4e..f63e5ca 100644
--- a/sys/kern/vfs_subr.c
+++ b/sys/kern/vfs_subr.c
@@ -3206,9 +3206,11 @@ loop:
 				}
 
 				if (VOP_GETVOBJECT(vp, &obj) == 0) {
+					VM_OBJECT_LOCK(obj);
 					vm_object_page_clean(obj, 0, 0,
 					    flags == MNT_WAIT ?
 					    OBJPC_SYNC : OBJPC_NOSYNC);
+					VM_OBJECT_UNLOCK(obj);
 				}
 				vput(vp);
 			}