nfs-server silent data corruption

[Mike Tancsa]

At 10:52 AM 4/21/2008, Arno J. Klaassen wrote:

>Device is :
>
>nfe0 at pci0:0:10:0:       class=0x068000 card=0x289510f1 
>chip=0x005710de rev=0xa3 hdr=0x00
>     vendor     = 'Nvidia Corp'
>     device     = 'nForce4 Ultra NVidia Network Bus Enumerator'
>     class      = bridge
>     cap 01[44] = powerspec 2  supports D0 D1 D2 D3  current D0
>
>(this is with the default BIOS setting " LAN Bridge Enabled", disabling
>  that setting makes pciconf say "class = network" but does not influence
>  my problem)
>
>I will restart my tests now by populating all 4G to only CPU1 and
>say whether that matters.

Hi,
How long does it take for the problem to show up ? I have what 
appears to be a very similar Tyan board (I have an Socket 939 X2 cpu) 
with the same NIC, but this one is running RELENG_7 from April 
17th.  There have been a few fixes for the nfe driver since 7.0

I am running this small script below on a nfs client (em nic) against 
the server (nfe) ( mount options on the client 192.168.245.1:/backup 
/backup nfs rw,-r=32768,-w=32768,tcp,noauto )

#!/bin/sh
i=0
while true
do
  i=`expr $i + 1`
  dd if=/dev/urandom of=/tmp/junk.txt bs=1024 count=81920  > /dev/null 2>&1
  cp -p /tmp/junk.txt /backup/
  orig=`md5 -q /tmp/junk.txt`
  umount /backup
  sleep 2
  mount /backup
  copy=`md5 -q /backup/junk.txt`
  echo "$orig and $copy on $i"
  if [ $orig != $copy ]; then
         echo "\a copy not ok on $i"
         exit 255
  fi
done

On the server, I have

nfe0 at pci0:0:10:0:       class=0x068000 card=0x286510f1 
chip=0x005710de rev=0xa3 hdr=0x00
     vendor     = 'Nvidia Corp'
     device     = 'nForce4 Ultra NVidia Network Bus Enumerator'
     class      = bridge
     cap 01[44] = powerspec 2  supports D0 D1 D2 D3  current D0

# ifconfig nfe0
nfe0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
         options=10b<RXCSUM,TXCSUM,VLAN_MTU,TSO4>
         ether 00:e0:81:58:91:6a
         inet 192.168.245.1 netmask 0xffffff00 broadcast 192.168.245.255
         media: Ethernet autoselect (1000baseTX <full-duplex,flag0,flag1>)
         status: active

How long does it take for the problem to come up ?


         ---Mike