Subject: Re: MMU Crashes.
To: None <port-sun3@NetBSD.ORG>
From: Wayne D. Hoxsie Jr. <wayne@oigodfrey.com>
List: port-sun3
Date: 03/06/1998 10:49:17
At 11:01 AM 3/6/98 EST, you wrote:
>> 
>> I finally got netbsd working on my sun3; however, the machine periodically
>> (sometimes just while unattended) will trap with an MMU error of some sort
>> (don't have a dump copy handy) mentioning virtual memory or the like.
>> 
>> I'm wondering if I have my swap space set up properly (and the main
>> partition for that matter), the reason being, I could still boot from the
>> installation filesystem leftover on the swap partition even several days
>> after the installation.  This seems to indicate that it is not using the
>> swap partition as it surely would have been overwritten.  Also, I've done
>> "continue" from the "db >" prompt after a trap and it dumps all over my root
>> partition and scrambles the boot kernel necessitating a complete reinstall.
>> 
>> My partitioning is set up with a 32 meg swap from 1st cyl to (+32 megs),
>> then the rest is my main partition from block (+32megs + next cyl boundary)
>> to the end.  (I don't have the exact parameters handy)
>> 
>> Should the swap be at the begining or end of the physical disk or does it
>> matter?  Is there any other place the kernel could be getting partition
>> information and thinking its different than what edlabel says?
>> 
>>
> do you happen to have your dmesg output handy?
>
> chris
>

Here you go:

NetBSD 1.3 (GENERIC) #0: Thu Jan 15 09:35:06 PST 1998
    jeremy@simon:/mnt/src/sys/arch/sun3x/compile/GENERIC
Model: Sun 3/80 (hostid 42005172)
fpu: mc68882
real mem = 16777216
avail mem = 14254080
using 115 buffers containing 942080 bytes of memory
mainbus0 (root)
obio0 at mainbus0
memerr0 at obio0 addr 0x61001000 ipl 7: (Parity memory)
intreg0 at obio0 addr 0x61001400
zsc0 at obio0 addr 0x62000000 ipl 6: (softpri 3)
kbd0 at zsc0 channel 0 (console)
ms0 at zsc0 channel 1
zsc1 at obio0 addr 0x62002000 ipl 6: (softpri 3)
zstty0 at zsc1 channel 0
zstty1 at zsc1 channel 1
zsc1: enabling zs interrupts
eeprom0 at obio0 addr 0x64000000
clock0 at obio0 addr 0x640007f8 ipl 5
iommu0 at obio0 addr 0x60000000: range 16MB
le0 at obio0 addr 0x65002000 ipl 3: address 08:00:20:07:ef:04
le0: 8 receive buffers, 2 transmit buffers
esp0 at obio0 addr 0x66000000 ipl 2: ESP100, 20MHz, SCSI ID 7
scsibus0 at esp0: 8 targets
sd0 at scsibus0 targ 0 lun 0: <DEC, RZ26L    (C) DEC, 440C> SCSI2 0/direct fixed
sd0: 1001MB, 3117 cyl, 8 head, 82 sec, 512 bytes/sect x 2050860 sectors
fdc0 at obio0 addr 0x6e000000 ipl 6 vect 0x40: (softpri 2) chip 82072
obmem0 at mainbus0
bwtwo0 at obmem0 addr 0x50400000 ipl 4 (1152x900)
enabling interrupts
boot device: sd0a
root on sd0a dumps on sd0b
root file system type: ffs