linux-kernel - Re: [PATCH net-next] netfilter: nf_conntrack: remove the unneed check for *bucket

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Message-ID: <56AD8163.4050309@huawei.com>
Date:	Sun, 31 Jan 2016 11:37:07 +0800
From:	Weidong Wang <wangweidong1@...wei.com>
To:	Florian Westphal <fw@...len.de>
CC:	<pablo@...filter.org>, <kaber@...sh.net>,
	<kadlec@...ckhole.kfki.hu>, David Miller <davem@...emloft.net>,
	<netfilter-devel@...r.kernel.org>, <coreteam@...filter.org>,
	<netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net-next] netfilter: nf_conntrack: remove the unneed check
 for *bucket

On 2016/1/31 5:30, Florian Westphal wrote:
> Weidong Wang <wangweidong1@...wei.com> wrote:
>> In the 'for(...) {}', the *bucket alwasy < net->ct.htable_size,
>> so remove the check
>> @@ -1383,14 +1383,12 @@ get_next_corpse(struct net *net, int (*iter)(struct nf_conn *i, void *data),
>>  		lockp = &nf_conntrack_locks[*bucket % CONNTRACK_LOCKS];
>>  		local_bh_disable();
>>  		spin_lock(lockp);
>> -		if (*bucket < net->ct.htable_size) {
> 
> AFAIU net->ct.htable_size can shrink between for-test and aquiring
> the bucket lockp, so this additional if-test is needed.
> 

ok, Got it.
So ignore this patch.

Regards,
Weidong

> .
>