Re: [PATCH v3] netfilter: save the hash of the tuple in the originaldirection for latter use

[Changli Gao]

On Fri, Aug 20, 2010 at 11:29 PM, Eric Dumazet <eric.dumazet@xxxxxxxxx> wrote:
> Le vendredi 20 août 2010 à 23:22 +0800, Changli Gao a écrit :
>
>> I should keep the old way, but fix a race.
>>
>>         if (unlikely(!nf_conntrack_hash_rnd_initted)) {
>>                 get_random_bytes(&nf_conntrack_hash_rnd,
>>                                 sizeof(nf_conntrack_hash_rnd));
>>                 nf_conntrack_hash_rnd_initted = 1;
>>         }
>>
>> nf_conntrack_alloc() isn't called with in the nf_conntrack_lock. So
>> the above code maybe executed more than once on different CPUs. It is
>> easy to fix with the cmpxchg() trick.
>
> Sure, please fix the race first.
>
> But as I said, its not critical, if one or two conntracks are hashed on
> wrong basis. They will eventually disappear after timeout.
>

Yes, and it isn't critical. I think this fix should be in a separate patch.


-- 
Regards,
Changli Gao(xiaosuo@xxxxxxxxx)
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