- Replace v_flag with v_iflag and v_vflag

 - v_vflag is protected by the vnode lock and is used when synchronization
   with VOP calls is needed.
 - v_iflag is protected by interlock and is used for dealing with vnode
   management issues.  These flags include X/O LOCK, FREE, DOOMED, etc.
 - All accesses to v_iflag and v_vflag have either been locked or marked with
   mp_fixme's.
 - Many ASSERT_VOP_LOCKED calls have been added where the locking was not
   clear.
 - Many functions in vfs_subr.c were restructured to provide for stronger
   locking.

Idea stolen from:	BSD/OS

1 files changed, 6 insertions, 2 deletions

diff --git a/sys/vm/vm_page.c b/sys/vm/vm_page.c
index 97a7b5d..5d61668 100644
--- a/sys/vm/vm_page.c
+++ b/sys/vm/vm_page.c
@@ -1174,8 +1174,12 @@ vm_page_free_toq(vm_page_t m)
 	) {
 		struct vnode *vp = (struct vnode *)object->handle;
 
-		if (vp && VSHOULDFREE(vp))
-			vfree(vp);
+		if (vp) {
+			VI_LOCK(vp);
+			if (VSHOULDFREE(vp))
+				vfree(vp);
+			VI_UNLOCK(vp);
+		}
 	}
 
 	/*