D53211.id.diff
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D53211.id.diff
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	diff --git a/sys/kern/kern_thread.c b/sys/kern/kern_thread.c
	--- a/sys/kern/kern_thread.c
	+++ b/sys/kern/kern_thread.c
	@@ -528,6 +528,24 @@
	* single threading requirement or some other STOP condition.
	*/
	PROC_LOCK(p);
	+ if ((p->p_flag & (P_STOPPED_SINGLE \| P_TOTAL_STOP)) ==
	+ (P_STOPPED_SINGLE \| P_TOTAL_STOP) &&
	+ p->p_suspcount + 1 == p->p_numthreads) {
	+ /*
	+ * If we are single-threaded by an remote process,
	+ * there might be nobody making the remote process
	+ * runable after it switches off cpu in
	+ * thread_single(). If the thread requested the
	+ * single-threading is off cpu, poke it to make
	+ * another round in thread_single().
	+ */
	+ thread_lock(p->p_singlethread);
	+ if (p->p_singlethread->td_proc != p &&
	+ TD_GET_STATE(p->p_singlethread) == TDS_CAN_RUN)
	+ setrunnable(p->p_singlethread, 0);
	+ else
	+ thread_unlock(p->p_singlethread);
	+ }
	thread_suspend_check(0);
	PROC_UNLOCK(p);
	}