netdev - Re: [PATCH v2] vxlan: remove the redundant gro_cells

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Message-ID: <005ad387-8d51-561e-a5b9-8e851e03d5e9@gmail.com>
Date:   Fri, 15 Mar 2019 09:06:25 -0700
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Stefano Brivio <sbrivio@...hat.com>,
        Zhiqiang Liu <liuzhiqiang26@...wei.com>
Cc:     davem@...emloft.net, petrm@...lanox.com, idosch@...lanox.com,
        sd@...asysnail.net, mousuanming@...wei.com, netdev@...r.kernel.org,
        Mingfangsen <mingfangsen@...wei.com>,
        "Zhoukang (A)" <zhoukang7@...wei.com>,
        "wangxiaogang (F)" <wangxiaogang3@...wei.com>,
        Eric Dumazet <eric.dumazet@...il.com>
Subject: Re: [PATCH v2] vxlan: remove the redundant gro_cells_destroy()
 calling.



On 03/15/2019 08:28 AM, Stefano Brivio wrote:
> On Fri, 15 Mar 2019 23:18:52 +0800
> Zhiqiang Liu <liuzhiqiang26@...wei.com> wrote:
> 
>> In vxlan_destroy_tunnels func, unregister_netdevice_queue is called after
>> gro_cells_destroy func. However, in unregister_netdevice_queue func, the
>> gro_cells_destroy func will also call the gro_cells_destroy func as the
>> following routine:
>> unregister_netdevice_many() -> rollback_registered_many()
>> -> ndo_uninit() -> gro_cells_destroy()  
>>
>> Signed-off-by: Suanming.Mou <mousuanming@...wei.com>
>> Reviewed-by: Zhiqiang Liu <liuzhiqiang26@...wei.com>
>> Reviewed-by: Stefano Brivio <sbrivio@...hat.com>
> 
> NACK, please read my and Eric's comments to v1 -- giving me more than 23
> minutes to answer would have been a nice touch as well :)
> 

Sorry for the confusion, I forgot to add the question marks to my sentences.

In fact, this is a bug fix, that we missed in the previous fix.

Technically the bug is older.