From owner-freebsd-current  Sat Sep  8 18:31:59 2001
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To: michael_class@gmx.net, michaelc@space.ebiz-hp.com
Cc: current@FreeBSD.ORG
Subject: Re: boot() called on cpu #1 - hang
From: Tor.Egge@fast.no
In-Reply-To: Your message of "Sat, 8 Sep 2001 18:21:33 +0200 (MEST)"
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> Hello,
> 
> on a 5.0-current i386-SMP system of today I am still getting on about
> every second reboot the message:
> 
> boot() called on cpu #1
> W

Try applying the enclosed patch.

- Tor Egge



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Index: vm_machdep.c
===================================================================
RCS file: /home/ncvs/src/sys/i386/i386/vm_machdep.c,v
retrieving revision 1.169
diff -u -r1.169 vm_machdep.c
--- vm_machdep.c	4 Sep 2001 08:36:46 -0000	1.169
+++ vm_machdep.c	4 Sep 2001 19:58:38 -0000
@@ -424,8 +433,13 @@
 {
 
 	cpu_reset_proxy_active = 1;
+	wbinvd();
 	while (cpu_reset_proxy_active == 1)
 		;	 /* Wait for other cpu to see that we've started */
+	cpu_reset_proxy_active = 3;
+	wbinvd();
+	while (cpu_reset_proxy_active == 3)
+		;  /* Wait for other cpu to enable interrupts */
 	stop_cpus((1<<cpu_reset_proxyid));
 	printf("cpu_reset_proxy: Stopped CPU %d\n", cpu_reset_proxyid);
 	DELAY(1000000);
@@ -463,6 +477,7 @@
 			cpu_reset_proxyid = PCPU_GET(cpuid);
 			cpustop_restartfunc = cpu_reset_proxy;
 			cpu_reset_proxy_active = 0;
+			wbinvd();
 			printf("cpu_reset: Restarting BSP\n");
 			started_cpus = (1<<0);		/* Restart CPU #0 */
 
@@ -471,9 +486,19 @@
 				cnt++;	/* Wait for BSP to announce restart */
 			if (cpu_reset_proxy_active == 0)
 				printf("cpu_reset: Failed to restart BSP\n");
-			enable_intr();
+			disable_intr();
 			cpu_reset_proxy_active = 2;
-
+			wbinvd();
+			cnt = 0;
+			while (cpu_reset_proxy_active == 2 && cnt < 10000000)
+				cnt++;	/* Wait for BSP to stop APs */
+			if (cpu_reset_proxy_active == 2) {
+				printf("cpu_reset: BSP did not stop APs\n");
+				cpu_reset_real();
+			}
+			cpu_reset_proxy_active = 4;
+			wbinvd();
+			enable_intr();
 			while (1);
 			/* NOTREACHED */
 		}

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