-To better support nonpreemptive threading systems perhaps some of the
-blocking functions internally in perl should do a yield() before a
-blocking call.
+To better support nonpreemptive threading systems, perhaps some of the
+blocking functions internally in Perl should do a yield() before a
+blocking call. (Now certain threads tests ({basic,list,thread.t})
+simply do a yield() before they sleep() to give nonpreemptive thread
+implementations a chance).