netdev - Re: [Bugme-new] [Bug 9778] New: unregister_netdevice: waiting for [device] to become free

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Message-Id: <20080119165802.2846a28e.akpm@linux-foundation.org>
Date:	Sat, 19 Jan 2008 16:58:02 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	"David S. Miller" <davem@...emloft.net>,
	Pavel Emelyanov <xemul@...nvz.org>
Cc:	"bugme-daemon@...nel-bugs.osdl.org" 
	<bugme-daemon@...zilla.kernel.org>, nigel@...pend2.net,
	netdev@...r.kernel.org
Subject: Re: [Bugme-new] [Bug 9778] New: unregister_netdevice: waiting for
 [device] to become free

On Sat, 19 Jan 2008 12:20:28 -0800 (PST) bugme-daemon@...zilla.kernel.org wrote:

> http://bugzilla.kernel.org/show_bug.cgi?id=9778
> 
>            Summary: unregister_netdevice: waiting for [device] to become
>                     free
>            Product: Networking
>            Version: 2.5
>      KernelVersion: 2.6.24-rc8
>           Platform: All
>         OS/Version: Linux
>               Tree: Mainline
>             Status: NEW
>           Severity: blocking
>           Priority: P1
>          Component: Other
>         AssignedTo: acme@...stprotocols.net
>         ReportedBy: nigel@...pend2.net
> 
> 
> Latest working kernel version: 2.6.24-rc7
> Earliest failing kernel version: 2.6.24-rc8
> Distribution: Ubuntu Gutsy
> Hardware Environment: AMD64, Atheros 5212 chipset
> Software Environment: Fairly recent madwifi svn.
> Problem Description: Patch "[PATCH][NEIGH] Fix race between neigh_parms_release
> and neightbl_fill_parms" (9cd40029423701c376391da59d2c6469672b4bed) causes the
> error described in the subject line to occur when seeking to unload a device.
> Also seen by some of my TuxOnIce users with e1000 and ppp42.
> 
> Steps to reproduce: Run a kernel with the above patch, bring up a (nonloopback)
> interface, seek to take it down.
> 

ouch.
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