Re: Ethtool doesn't work on Debian unstable?

[Andre Tomt <andre@xxxxxxxx>]

cliff white wrote:
> This is wierd. I know I am doing something Real Stupid, but i can't figure it 
> out.
>
> Two systems.  2.6.11 kernel on both systems. 
> One runs RedHat 9.0, and ethtool Just Works:
>  ethtool -g eth0
> Ring parameters for eth0:
> Pre-set maximums:
> RX:             256
> RX Mini:        0
> RX Jumbo:       0
> TX:             256
> Current hardware settings:
> RX:             64
> RX Mini:        0
> RX Jumbo:       0
> TX:             64
> --------------------
> The other is Debian unstable, and nothing works:
>  ethtool -g eth0
> Ring parameters for eth0:
> Cannot get device ring settings: Operation not supported
> ------------------------
> If i strace, i see the ioctl failing on the Debian side:
> 7657  munmap(0xb7fd6000, 75321)         = 0
> 7657  socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 3
> 7657  fstat64(1, {st_mode=S_IFCHR|0600, st_rdev=makedev(136, 5), ...}) = 0
> 7657  mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) 
> = 0xb7fe8000
> 7657  write(1, "Ring parameters for eth1:\n", 26) = 26
> 7657  ioctl(3, SIOCETHTOOL, 0xbffffd30) = -1 EOPNOTSUPP (Operation not 
> supported)
> 7657  dup(2)                            = 4
> ------------------------
> Can anyone help me here? I'd like to use Debian for this testing, but so far, 
> no love.
> cliffw
Most likely the other debian system just is using a network driver that 
do not support ethtool, or even just that ethtool command. ethtool 
support differs a lot between drivers, with quite a few not supporting 
ethtool at all.