From mboxrd@z Thu Jan  1 00:00:00 1970
From: Johannes Berg <johannes@sipsolutions.net>
Subject: Re: sysfs class/net/ problem
Date: Wed, 02 Jun 2010 20:55:53 +0200
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Cc: Greg KH <greg@kroah.com>, netdev <netdev@vger.kernel.org>
To: "Eric W. Biederman" <ebiederm@xmission.com>
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On Wed, 2010-06-02 at 11:05 -0700, Eric W. Biederman wrote:

> If you want to dig into this look at sysfs_delete_link.  instrument
> it so that you can see if it is called for wlan{0,1,2} and see what
> ns it is called for.
> 
> My current hypothesis is something is causing us to try and delete
> the symlink from the wrong namespace, so we just skip that part of it.

[   78.253128] create link wlan0 ns=ffff88001ce1e600
...
[   93.462268] delete link wlan0 ns=ffff88001ce1e600

looks the same ...

Also note

[  109.872488] netconsole: network logging stopped, interface wlan0 unregistered
[  109.872910] PM: Removing info for No Bus:wlan0
[  109.872941] delete link wlan0 ns=ffff88001e9bd600
[  110.130563] PM: Removing info for No Bus:rfkill0
[  110.130599] delete link rfkill0 ns=ffff88001b61ea80
[  110.131135] PM: Removing info for No Bus:phy0
[  110.131161] delete link phy0 ns=ffff88001b61e240
[  110.131424] PM: Removing info for No Bus:hwsimdev0
[  110.131445] delete link hwsimdev0 ns=ffff88001b67ed80

(I changed the struct device thing in hwsim to be hwsimdev%d rather than
hwsim%d to tell the difference to hwsim0, the monitor netdev) so it's
getting removed from PM way after the wlan0 that links into it...

johannes