Date: Thu, 31 Oct 1996 14:03:18 -0800 From: "Jin Guojun[ITG]" <jin@george.lbl.gov> To: questions@freebsd.org Subject: Help on crashing of some Pro motherboard Message-ID: <199610312203.OAA22613@george.lbl.gov>
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Environment:
Tyan S1662 Pentium Pro 200 MHz motherboard
All components (memory, video card) are working on an ASUS motherboard
(also a 200MHz CPU). Also, a FFT program runs with huge image on both machines
without problem and had same result.
Problem:
Machine periodically panic with:
supervsor writing page fault.
The period is about 10 minutes.
Since trap reports that page fault, but the memory simms are good,
so I disabled both internal and external caches, the crashing still
happenes about every 10 minutes.
Does FreeBSD kernel do some memory writing every 10 minutes at some where?
The interesting thing "why it panics about every 10 minutes?"
If this is defect of memory, cache, or MMU, it should crash when ever the
memory is addressed.
Is this a defected motherboard, or is there some time tricky for this problem?
Attached is the core dump, which is not very meaningful for me.
Please send any information or suggestion for this problem.
If FreeBSD does not work with this motherboard, I will exchange this
motherboard with AUSU one A.S.A.P before the 30 days.
If this is a defected motherboard, I will ask the vendor to change a new one.
Thanks for helps in advance,
-Jin Guojun
----------------------- core dump -----------------------
# gdb -k kernel.0 vmcore.0
GDB is free software and you are welcome to distribute copies of it
under certain conditions; type "show copying" to see the conditions.
There is absolutely no warranty for GDB; type "show warranty" for details.
GDB 4.13 (i386-unknown-freebsd),
Copyright 1994 Free Software Foundation, Inc...
IdlePTD 274000
current pcb at 257c58
panic: page fault
#0 0xf0117127 in boot (howto=256) at ../../kern/kern_shutdown.c:236
236 savectx(&dumppcb);
(kgdb) where
#0 0xf0117127 in boot (howto=256) at ../../kern/kern_shutdown.c:236
#1 0xf0117471 in panic (fmt=0xf020189f "page fault")
at ../../kern/kern_shutdown.c:361
#2 0xf0202537 in trap_fatal (frame=0xf024afc4) at ../../i386/i386/trap.c:741
#3 0xf0201f41 in trap_pfault (frame=0xf024afc4, usermode=0)
at ../../i386/i386/trap.c:652
#4 0xf0201c7f in trap (frame={tf_es = -266076144, tf_ds = -266338288,
tf_edi = 0, tf_esi = -265980772, tf_ebp = 0, tf_isp = -266031124,
tf_ebx = -265928120, tf_edx = -265931532, tf_ecx = 37, tf_eax = 0,
tf_trapno = 12, tf_err = 2, tf_eip = -266332683, tf_cs = 8,
tf_eflags = 66118, tf_esp = 7, tf_ss = 1559})
at ../../i386/i386/trap.c:311
(kgdb) up 4
#4 0xf0201c7f in trap (frame={tf_es = -266076144, tf_ds = -266338288,
tf_edi = 0, tf_esi = -265980772, tf_ebp = 0, tf_isp = -266031124,
tf_ebx = -265928120, tf_edx = -265931532, tf_ecx = 37, tf_eax = 0,
tf_trapno = 12, tf_err = 2, tf_eip = -266332683, tf_cs = 8,
tf_eflags = 66118, tf_esp = 7, tf_ss = 1559})
at ../../i386/i386/trap.c:311
311 (void) trap_pfault(&frame, FALSE);
(kgdb) l
306 } else {
307 /* kernel trap */
308
309 switch (type) {
310 case T_PAGEFLT: /* page fault */
311 (void) trap_pfault(&frame, FALSE);
312 return;
313
314 case T_DNA:
315 #if NNPX > 0
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