netdev - Re: [PATCH net-next 03/12] vxlan: move IGMP join/leave to work queue

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Date:	Tue, 11 Jun 2013 02:01:32 +0000 (UTC)
From:	Cong Wang <xiyou.wangcong@...il.com>
To:	netdev@...r.kernel.org
Subject: Re: [PATCH net-next 03/12] vxlan: move IGMP join/leave to work queue

On Mon, 10 Jun 2013 at 20:24 GMT, Stephen Hemminger <stephen@...workplumber.org> wrote:
> Do join/leave from work queue to avoid lock inversion problems
> between normal socket and RTNL. The code comes out cleaner
> as well.
>
> Uses Cong Wang's suggestion to turn refcnt into a real atomic
> since now need to handle case where last use of socket is IGMP
> worker.
>
> Also fixes race where vxlan_stop could be called after
> device was deleted on module removal. The call to rtnl_link_unregister
> would call dellink while vxlan device was still up. Reordering
> the calls fixes it.
>
> Signed-off-by: Stephen Hemminger <stephen@...workplumber.org>
>

Tested-by: Cong Wang <xiyou.wangcong@...il.com>
Acked-by: Cong Wang <xiyou.wangcong@...il.com>

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