netdev - Re: [PATCH 1/3] inetpeer: Support ipv6 addresses.

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Date:	Mon, 29 Nov 2010 22:31:15 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	xiaosuo@...il.com, netdev@...r.kernel.org
Subject: Re: [PATCH 1/3] inetpeer: Support ipv6 addresses.

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Tue, 30 Nov 2010 07:11:19 +0100

> Le lundi 29 novembre 2010 à 21:53 -0800, David Miller a écrit :
>> From: Eric Dumazet <eric.dumazet@...il.com>
>> Date: Tue, 30 Nov 2010 06:42:16 +0100
>> 
>> > Its a bit early in the morning here, I must confess I dont yet
>> > understand your patch David :)
>> > 
>> > As we use a tree, why not using two different trees for ipv4 / ipv6 ?
>> 
>> The "key" just creates a natural ordering in the tree, it's
>> almost arbitrary except that it must distribute well amongst
>> the entries.
> 
> Hmm. AVL search must take a decision, take the left or the right path.
> 
> if current key is equal, which path do you take ?

Right. :-)  But yes there is some error that needs to
be handled in that equal keys can lead to imporper paths
as you showed.

I guess I do need to make a seperate tree, how disappointing.

Anyways I will work on fixing this.

> Do you know how to make an estimation on a server ?

No way to do it straightforward I guess because right now TCP metrics
key on all sorts of rediculious things like source address, TOS, and
other crap as a consequence of how the routing cache works.

So much replicated information and wasted memory.

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