Hi Frank,

Could you please try the diff below?

-p.

Index: uvm_km.c
===================================================================
RCS file: /data/cvs/openbsd/src/sys/uvm/uvm_km.c,v
retrieving revision 1.63
diff -u -p -r1.63 uvm_km.c
--- uvm_km.c	29 Apr 2007 15:46:42 -0000	1.63
+++ uvm_km.c	4 Jun 2007 07:03:19 -0000
@@ -534,10 +534,20 @@ uvm_km_alloc1(struct vm_map *map, vsize_
 		}
 		simple_unlock(&uvm.kernel_object->vmobjlock);
 		if (__predict_false(pg == NULL)) {
-			uvm_wait("km_alloc1w");	/* wait for memory */
-			continue;
+			if (curproc == uvm.pagedaemon_proc) {
+				/*
+				 * It is unfeasible for the page daemon to
+				 * sleep for memory, so free what we have
+				 * allocated and fail.
+				 */
+				uvm_unmap(map, kva, loopva - kva);
+				return (NULL);
+			} else {
+				uvm_wait("km_alloc1w");	/* wait for memory */
+				continue;
+			}
 		}
-		
+
 		/*
 		 * map it in; note we're never called with an intrsafe
 		 * object, so we always use regular old pmap_enter().

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