linux-kernel - 2.6.20/2.6.20-rc7 : ethX renumbered

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Message-ID: <011001c74dcf$c60c1c80$2101a8c0@donald>
Date:	Sun, 11 Feb 2007 12:28:37 +0100
From:	"Paul Rolland" <rol@...be.net>
To:	"'Linux Kernel Mailing List'" <linux-kernel@...r.kernel.org>
Cc:	<rol@...917.net>
Subject: 2.6.20/2.6.20-rc7 : ethX renumbered

Hello,

I'm facing something quite strange... When booting one of these kernels
(it's a new machine, I've not been running older kernels), the boot message
says :

ACPI: PCI Interrupt 0000:04:00.0[A] -> GSI 19 (level, low) -> IRQ 19
sky2 v1.10 addr 0xff8fc000 irq 19 Yukon-EC (0xb6) rev 2
sky2 eth0: addr 00:18:f3:e0:5d:d4
ACPI: PCI Interrupt 0000:03:00.0[A] -> GSI 16 (level, low) -> IRQ 16
sky2 v1.10 addr 0xff7fc000 irq 16 Yukon-EC (0xb6) rev 2
sky2 eth1: addr 00:18:f3:e0:36:fd

So, I'm expecting two interfaces : eth0 and eth1

Unfortunately, at the end of the boot process, I can find eth1 and eth2,
something/somewhat/someone has renumbered them ;

eth1      Link encap:Ethernet  HWaddr 00:18:F3:E0:36:FD  
          BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
          Interrupt:16 

eth2      Link encap:Ethernet  HWaddr 00:18:F3:E0:5D:D4  
          inet addr:192.168.1.3  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::218:f3ff:fee0:5dd4/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:42780 errors:0 dropped:0 overruns:0 frame:0
          TX packets:25519 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:61859841 (58.9 MiB)  TX bytes:2031644 (1.9 MiB)
          Interrupt:19 

This does also occurs when I boot in single user mode, so I did a quick check
at the processes running then, and found udevd, but there is no reference to
ethX in the configuration files, only veth :
 
root@...i:/Kernels/External# cd /etc/udev/
root@...i:/etc/udev# grep -r eth *
rules.d/90-modprobe.rules:ENV{VIO_TYPE}=="network",
RUN+="/sbin/modprobe -Qba ibmveth"
rules.d/90-modprobe.rules:ENV{VIO_TYPE}=="vlan",
RUN+="/sbin/modprobe -Qba iseries_veth"

Is it something expected ? Or is it because Sky2 is still EXPERIMENTAL ?

Regards,
Paul

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