netdev - Re: network device reference leak with net-next

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Message-ID: <1289847840.2607.120.camel@edumazet-laptop>
Date:	Mon, 15 Nov 2010 20:04:00 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Stephen Hemminger <shemminger@...tta.com>
Cc:	netdev@...r.kernel.org
Subject: Re: network device reference leak with net-next

Le lundi 15 novembre 2010 à 10:56 -0800, Stephen Hemminger a écrit :
> This is a new regression (doesn't exist with 2.6.36)
> 
> If I shutdown KVM instance with Virt manager, the virtual
> interfaces in the bridge aren't getting cleaned up because
> of leftover reference count.
> 
> 
> [ 9781.050474] unregister_netdevice: waiting for vnet1 to become free. Usage count = 1
> [ 9785.143400] virbr4: port 3(vnet6) entering forwarding state
> [ 9785.177194] virbr4: port 3(vnet6) entering disabled state
> [ 9785.201129] device vnet6 left promiscuous mode
> [ 9785.201135] virbr4: port 3(vnet6) entering disabled state
> [ 9791.286950] unregister_netdevice: waiting for vnet1 to become free. Usage count = 1
> [ 9795.461526] unregister_netdevice: waiting for vnet6 to become free. Usage count = 1
> [ 9801.523398] unregister_netdevice: waiting for vnet1 to become free. Usage count = 1
> --

Is the refcount stay forever to 1, or eventually reaches 0 ?



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