netdev - Re: [PATCH net-next 02/12] vxlan: fix race between flush and incoming learning

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Message-ID: <kp60c6$rn$2@ger.gmane.org>
Date:	Tue, 11 Jun 2013 02:00:38 +0000 (UTC)
From:	Cong Wang <xiyou.wangcong@...il.com>
To:	netdev@...r.kernel.org
Subject: Re: [PATCH net-next 02/12] vxlan: fix race between flush and
 incoming learning

On Mon, 10 Jun 2013 at 20:24 GMT, Stephen Hemminger <stephen@...workplumber.org> wrote:
> It is possible for a packet to arrive during vxlan_stop(), and
> have a dynamic entry created. Close this by checking if device
> is up.
>
>  CPU1                             CPU2   
> vxlan_stop
>   vxlan_flush
>      hash_lock acquired
>                                   vxlan_encap_recv
>                                      vxlan_snoop
>                                         waiting for hash_lock
>      hash_lock relased
>   vxlan_flush done
>                                         hash_lock acquired
>                                         vxlan_fdb_create
>
> Signed-off-by: Stephen Hemminger <stephen@...workplumber.org>

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

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