From bf1a32206119875dabc12723ad546ec4578e5c49 Mon Sep 17 00:00:00 2001
From: David Xu <davidxu@FreeBSD.org>
Date: Tue, 21 Mar 2006 10:05:15 +0000
Subject: [PATCH] Rethink it a bit, if there is a STOP flag, don't bother to
 resume other threads.

---
 sys/kern/kern_thread.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sys/kern/kern_thread.c b/sys/kern/kern_thread.c
index 44d5a6b65bd7..11c194ac0a46 100644
--- a/sys/kern/kern_thread.c
+++ b/sys/kern/kern_thread.c
@@ -767,6 +767,8 @@ thread_single(int mode)
 	else
 		remaining = p->p_numthreads - p->p_suspcount;
 	while (remaining != 1) {
+		if (P_SHOULDSTOP(p) != P_STOPPED_SINGLE)
+			goto stopme;
 		FOREACH_THREAD_IN_PROC(p, td2) {
 			if (td2 == td)
 				continue;
@@ -822,6 +824,7 @@ thread_single(int mode)
 		if (remaining == 1)
 			break;
 
+stopme:
 		/*
 		 * Wake us up when everyone else has suspended.
 		 * In the mean time we suspend as well.