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Date:   Mon, 6 Jul 2020 16:38:26 +0200
From:   Florian Westphal <fw@strlen.de>
To:     wenxu@ucloud.cn
Cc:     davem@davemloft.net, pablo@netfilter.org, netdev@vger.kernel.org,
        netfilter-devel@vger.kernel.org
Subject: Re: [PATCH net-next 1/3] netfilter: nf_defrag_ipv4: Add
 nf_ct_frag_gather support
Message-ID: <20200706143826.GA32005@breakpoint.cc>
References: <1593959312-6135-1-git-send-email-wenxu@ucloud.cn>
 <1593959312-6135-2-git-send-email-wenxu@ucloud.cn>
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wenxu@ucloud.cn <wenxu@ucloud.cn> wrote:
> From: wenxu <wenxu@ucloud.cn>
> 
> Add nf_ct_frag_gather for conntrack defrag and it will
> elide the CB clear when packets are defragmented by
> connection tracking

Why is this patch required?
Can't you rework ip_defrag to avoid the cb clear if you need that?