netdev - Re: [PATCH v2 2/2] sctp: optimize the sctp_sysctl_net

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Date:	Wed, 12 Feb 2014 09:21:05 +0800
From:	Wang Weidong <wangweidong1@...wei.com>
To:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
	<nhorman@...driver.com>, <davem@...emloft.net>,
	<vyasevich@...il.com>
CC:	<dborkman@...hat.com>, <netdev@...r.kernel.org>
Subject: Re: [PATCH v2 2/2] sctp: optimize the sctp_sysctl_net_register

On 2014/2/12 0:47, Sergei Shtylyov wrote:
> Hello.
> 
> On 02/11/2014 04:49 AM, Wang Weidong wrote:
> 
>> Here, when the net is init_net, we needn't to kmemdup the ctl_table
>> again. So add a check for net. Also we can save some memory.
> 
>> Signed-off-by: Wang Weidong <wangweidong1@...wei.com>
>> ---
>>   net/sctp/sysctl.c | 16 +++++++++-------
>>   1 file changed, 9 insertions(+), 7 deletions(-)
> 
>> diff --git a/net/sctp/sysctl.c b/net/sctp/sysctl.c
>> index 2ddb401..b65396b 100644
>> --- a/net/sctp/sysctl.c
>> +++ b/net/sctp/sysctl.c
>> @@ -403,15 +403,17 @@ static int proc_sctp_do_rto_max(struct ctl_table *ctl, int write,
>>
>>   int sctp_sysctl_net_register(struct net *net)
>>   {
>> -    struct ctl_table *table;
>> -    int i;
>> +    struct ctl_table *table = sctp_net_table;
>>
>> -    table = kmemdup(sctp_net_table, sizeof(sctp_net_table), GFP_KERNEL);
>> -    if (!table)
>> -        return -ENOMEM;
>> +    if (!net_eq(net, &init_net)) {
>> +        int i;
> 
>    Empty line after declaration wouldn't hurt, just like above.
> 
Yeah. I will change it soon.

Thanks
Wang

>> +        table = kmemdup(sctp_net_table, sizeof(sctp_net_table), GFP_KERNEL);
>> +        if (!table)
>> +            return -ENOMEM;
> 
> WBR, Sergei
> 
> -- 
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> 


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