netdev - Re: [PATCH 3/4 - rev 2] Initilize and populate age field

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Message-ID: <46CACD4D.3010408@linux.vnet.ibm.com>
Date:	Tue, 21 Aug 2007 17:02:29 +0530
From:	Varun Chandramohan <varunc@...ux.vnet.ibm.com>
To:	Thomas Graf <tgraf@...g.ch>
CC:	davem@...emloft.net, netdev@...r.kernel.org, kaber@...sh.net,
	socketcan@...tkopp.net, shemminger@...ux-foundation.org,
	krkumar2@...ibm.com, varuncha@...ibm.com
Subject: Re: [PATCH 3/4 - rev 2] Initilize and populate age field

Thomas Graf wrote:
> * Varun Chandramohan <varunc@...ux.vnet.ibm.com> 2007-08-21 16:52
>   
>> I know its a bit confusing but let me explain the reason. In my first
>> version patch i used fn_hash_insert() (place where alias is created)as
>> place to insert my current time in the age field.
>> This will eventually call fib_dump_info() for inserting the age filed
>> attribute into the skb. Now in both places i have to call
>> do_gettimeofday(). Its obvious that i need it in fn_hash_insert(), its
>> also need in fib_dump_info() as it is the same function called for
>> retrieving and dumping the age value to the userspace. So as you are
>> aware that before we dump it to userspace we need to subtract the value
>> with current time i need to call do_gettimeofday() twice. To avoid this
>> i did as above.
>>     
>
> At least put a comment there, it's far from obvious.
>   
ok, thanks for the suggestion. Ill put a comment on that.
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