D22405.id64485.diff
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	Index: head/sys/vm/vm_map.c
	===================================================================
	--- head/sys/vm/vm_map.c
	+++ head/sys/vm/vm_map.c
	@@ -2469,17 +2469,16 @@
	vm_map_unlock(map);
	return (KERN_PROTECTION_FAILURE);
	}
	- if ((entry->eflags & MAP_ENTRY_IN_TRANSITION) != 0)
	- in_tran = entry;
	+ if ((current->eflags & MAP_ENTRY_IN_TRANSITION) != 0)
	+ in_tran = current;
	}

	/*
	- * Postpone the operation until all in transition map entries
	- * are stabilized. In-transition entry might already have its
	- * pages wired and wired_count incremented, but
	- * MAP_ENTRY_USER_WIRED flag not yet set, and visible to other
	- * threads because the map lock is dropped. In this case we
	- * would miss our call to vm_fault_copy_entry().
	+ * Postpone the operation until all in-transition map entries have
	+ * stabilized. An in-transition entry might already have its pages
	+ * wired and wired_count incremented, but not yet have its
	+ * MAP_ENTRY_USER_WIRED flag set. In which case, we would fail to call
	+ * vm_fault_copy_entry() in the final loop below.
	*/
	if (in_tran != NULL) {
	in_tran->eflags \|= MAP_ENTRY_NEEDS_WAKEUP;