Date: Sat, 25 Sep 1999 01:45:43 +0200 From: Tor.Egge@fast.no To: mjacob@feral.com Cc: freebsd-current@FreeBSD.ORG Subject: Re: DDB && SMP? Message-ID: <199909242345.BAA38564@midten.fast.no> In-Reply-To: Your message of "Fri, 24 Sep 1999 15:19:58 -0700 (PDT)" References: <Pine.BSF.4.05.9909241519350.4296-100000@semuta.feral.com>
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[-- Attachment #1 --]
>
> I just ran across this:
>
> Debugger("isp_attach")
> Stopped at Debugger+0x37: movl $0,in_Debugger
> db> cont
> whoa, other_cpus: 0x00000002, stopped_cpus: 0x00000000
> panic: stop_cpus() failed
> mp_lock = 00000002; cpuid = 0; lapic.id = 00000000
> Automatic reboot in 15 seconds - press a key on the console to abort
>
>
> Whuffo?
The kernel probably entered the debugger after the AP had been started
but before it accepts any interrupts.
- Tor Egge
[-- Attachment #2 --]
Index: sys/i386/i386/db_interface.c
===================================================================
RCS file: /home/ncvs/src/sys/i386/i386/db_interface.c,v
retrieving revision 1.46
diff -u -r1.46 db_interface.c
--- db_interface.c 1999/08/28 00:43:42 1.46
+++ db_interface.c 1999/09/24 23:43:34
@@ -167,7 +167,7 @@
#endif /* VERBOSE_CPUSTOP_ON_DDBBREAK */
/* Restart all the CPUs we previously stopped */
- if (stopped_cpus != other_cpus) {
+ if (stopped_cpus != other_cpus && smp_started != 0) {
db_printf("whoa, other_cpus: 0x%08x, stopped_cpus: 0x%08x\n",
other_cpus, stopped_cpus);
panic("stop_cpus() failed");
Index: sys/i386/include/smp.h
===================================================================
RCS file: /home/ncvs/src/sys/i386/include/smp.h,v
retrieving revision 1.47
diff -u -r1.47 smp.h
--- smp.h 1999/08/28 00:44:25 1.47
+++ smp.h 1999/09/24 23:39:47
@@ -177,6 +177,7 @@
/* global data in init_smp.c */
extern int invltlb_ok;
extern int smp_active;
+extern int smp_started;
extern volatile int smp_idle_loops;
#endif /* !LOCORE */
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