netdev - Re: [PATCH 1/4] flow: virtualize flow cache entry methods

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Date:	Tue, 06 Apr 2010 16:26:28 +0300
From:	Timo Teräs <timo.teras@....fi>
To:	Herbert Xu <herbert@...dor.apana.org.au>
CC:	netdev@...r.kernel.org
Subject: Re: [PATCH 1/4] flow: virtualize flow cache entry methods

Herbert Xu wrote:
> On Mon, Apr 05, 2010 at 08:01:24PM +0300, Timo Teras wrote:
>> This allows to validate the cached object before returning it.
>> It also allows to destruct object properly, if the last reference
>> was held in flow cache. This is also a prepartion for caching
>> bundles in the flow cache.
>>
>> In return for virtualizing the methods, we save on:
>> - not having to regenerate the whole flow cache on policy removal:
>>   each flow matching a killed policy gets refreshed as the getter
>>   function notices it smartly.
>> - we do not have to call flow_cache_flush from policy gc, since the
>>   flow cache now properly deletes the object if it had any references
>>
>> Signed-off-by: Timo Teras <timo.teras@....fi>
> 
> Acked-by: Herbert Xu <herbert@...dor.apana.org.au>
> 
> Thanks a lot for the patch!

As noticed in review of 2/4, this needs to be fixed by calling
flow object delete() unconditionally if genid is outdated. I'll
repost with this fixed for next iteration.

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