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Date:	Fri, 24 Feb 2012 17:27:44 +0800
From:	Gao feng <gaofeng@...fujitsu.com>
To:	David Miller <davem@...emloft.net>
CC:	netdev@...r.kernel.org
Subject: Re: [PATCH] ipv6: Fix problem with expired dst cache

于 2012年02月24日 14:47, David Miller 写道:
> From: Gao feng <gaofeng@...fujitsu.com>
> Date: Fri, 24 Feb 2012 14:20:04 +0800
> 
>> diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h
>> index b26bb81..3da4d58c 100644
>> --- a/include/net/ip6_fib.h
>> +++ b/include/net/ip6_fib.h
>> @@ -106,6 +106,7 @@ struct rt6_info {
>>  	u32				rt6i_metric;
>>  	u32				rt6i_peer_genid;
>>  
>> +	struct rt6_info			*rt6i_copy;
>>  	struct inet6_dev		*rt6i_idev;
>>  	struct inet_peer		*rt6i_peer;
> 
> This bloats up every route and cached entry in the machine, find
> another way.
> 

How about calling rt6_get_dflt_route to find out the default dst,
and check if it has expired when we use the cache dst?

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