Tyan k8sr lockups

[Sven Willenberger]

On Thu, 2005-03-31 at 14:26 -0500, Gary Mu1der wrote:
> All,
> 
> Pulled 2GB of RAM and the system still hangs after a few seconds of 
> running the dd w/4GB RAM and amd64 generic on FreeBSD 5.3-REL.
> 
> Upgraded the kernel to:
> 
> $ uname -a
> FreeBSD d10.bidx.com 5.4-PRERELEASE FreeBSD 5.4-PRERELEASE #0: Thu Mar 
> 31 13:55:10 EST 2005     root at d10.bidx.com:/usr/obj/usr/src/sys/GENERIC 
>   amd64
> 
> ... and got the exact same hang w/4GB of RAM and 5.4-PRE...
> 
> Can someone/anyone with a Tyan motherboard and 1 or 2 CPUs (I'm 
> currently using the non-SMP GENERIC kernel even though I have dual 
> Opteron 246's) try to reproduce this problem when running:
> 
> 	dd if=/dev/mem of=/dev/null bs=1024k
> 
> Thanks,
> Gary

Confirmed the hang with a dual opteron system (248's) with 8GB of ram
using the dd command above. System hung within seconds of issuing said
command using an SMP-enabled kernel.

FreeBSD 5.4-PRERELEASE #0: Thu Mar 17 22:41:53 EST 2005
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: AMD Opteron(tm) Processor 248 (2190.55-MHz K8-class CPU)
  Origin = "AuthenticAMD"  Id = 0xf5a  Stepping = 10

Features=0x78bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2>
  AMD Features=0xe0500800<SYSCALL,NX,MMX+,LM,3DNow+,3DNow>
real memory  = 8589934592 (8192 MB)
avail memory = 8250437632 (7868 MB)
ACPI APIC Table: <A M I  OEMAPIC >
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
 cpu0 (BSP): APIC ID:  0
 cpu1 (AP): APIC ID:  1
MADT: Forcing active-low polarity and level trigger for SCI
ioapic0 <Version 1.1> irqs 0-23 on motherboard
ioapic1 <Version 1.1> irqs 24-27 on motherboard
ioapic2 <Version 1.1> irqs 28-31 on motherboard
acpi0: <A M I OEMRSDT> on motherboard
acpi0: Power Button (fixed)
Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x5008-0x500b on acpi0
cpu0: <ACPI CPU> on acpi0
acpi_throttle0: <ACPI CPU Throttling> on cpu0
cpu1: <ACPI CPU> on acpi0


Sven