Author: kib
Date: Sat Apr 23 21:38:21 2011
New Revision: 220977
URL: http://svn.freebsd.org/changeset/base/220977
Log:
Fix two bugs in r218670.
Hold the vnode around the region where object lock is dropped, until
vnode lock is acquired.
Do not drop the vnode reference for a case when the object was
deallocated during unlock. Note that in this case, VV_TEXT is cleared
by vnode_pager_dealloc().
Reported and tested by: pho
Reviewed by: alc
MFC after: 3 days
Modified:
head/sys/vm/vm_object.c
Modified: head/sys/vm/vm_object.c
==============================================================================
--- head/sys/vm/vm_object.c Sat Apr 23 21:02:25 2011 (r220976)
+++ head/sys/vm/vm_object.c Sat Apr 23 21:38:21 2011 (r220977)
@@ -443,14 +443,21 @@ vm_object_vndeallocate(vm_object_t objec
/* vrele may need the vnode lock. */
vrele(vp);
} else {
+ vhold(vp);
VM_OBJECT_UNLOCK(object);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
+ vdrop(vp);
VM_OBJECT_LOCK(object);
object->ref_count--;
- if (object->ref_count == 0)
- vp->v_vflag &= ~VV_TEXT;
- VM_OBJECT_UNLOCK(object);
- vput(vp);
+ if (object->type == OBJT_DEAD) {
+ VM_OBJECT_UNLOCK(object);
+ VOP_UNLOCK(vp, 0);
+ } else {
+ if (object->ref_count == 0)
+ vp->v_vflag &= ~VV_TEXT;
+ VM_OBJECT_UNLOCK(object);
+ vput(vp);
+ }
}
}
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