Re: linux-2.6.23-git3: Many sysfs-related warnings in dmesg

[Greg KH <greg@kroah.com>]

On Wed, Oct 17, 2007 at 12:16:54PM +0200, Kay Sievers wrote:
> On Tue, 2007-10-16 at 16:23 -0700, Greg KH wrote:
> > On Tue, Oct 16, 2007 at 03:32:48PM -0700, David Miller wrote:
> > > From: Greg KH <greg@kroah.com>
> > > Date: Tue, 16 Oct 2007 14:37:30 -0700
> > > 
> > > > Kay, are we doing something wrong in userspace when renaming wireless
> > > > devices such that we can overlap names?
> 
> Not udev, but SUSE 10.2's network renaming. It uses udev and calls
> ifrename in the same code path. 10.3 uses the unified version from the
> udev tree.
> 
> > > It does it for all network devices, I see this ugly message on every
> > > single system I have from Fedora foo to RHEL foo to ubuntu foo to
> > > debian foo.
> > >
> > > udev simply applies the MAC address to device name rules blindly, it
> > > doesn't check if the device already has the desired name already
> 
> There is a check for the same name in udev for long.
> 
> > Ugh :(
> > 
> > > It's been like this forever, and since userland has been doing it for
> > > so long, you can't warn on this there is too much established
> > > practice.  Expecting people to install "fixed" udev is not an
> > > acceptable answer, the warning is a regression and therefore you'll
> > > have to remove the kernel warning for this case and live with this
> > > issue essentially forever.
> 
> We should probably just add the check to kobject_rename() and print a
> simple warning and then do nothing. Or just do the check in the network
> ioctl, if we really don't want to see this.

I agree that perhaps kobject_rename() should check for this.  Let me go
see if I can get that to work...

thanks,

greg k-h