netdev - Re: [patch net-next v3 09/17] bridge: add API to notify bridge driver of learned FBD on offloaded device

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Date:	Tue, 25 Nov 2014 22:22:44 -0500
From:	Jamal Hadi Salim <jhs@...atatu.com>
To:	Florian Fainelli <f.fainelli@...il.com>,
	Jiri Pirko <jiri@...nulli.us>, netdev@...r.kernel.org
CC:	davem@...emloft.net, nhorman@...driver.com, andy@...yhouse.net,
	tgraf@...g.ch, dborkman@...hat.com, ogerlitz@...lanox.com,
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	ben@...adent.org.uk, stephen@...workplumber.org,
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	bcrl@...ck.org
Subject: Re: [patch net-next v3 09/17] bridge: add API to notify bridge driver
 of learned FBD on offloaded device

On 11/25/14 17:44, Florian Fainelli wrote:
> On 25/11/14 02:28, Jiri Pirko wrote:

>> @@ -101,6 +101,7 @@ struct net_bridge_fdb_entry
>>   	unsigned char			is_local;
>>   	unsigned char			is_static;
>>   	unsigned char			added_by_user;
>> +	unsigned char			added_by_external_learn;
>
> Pheww, we could be saving some memory footprint here by using different
> types here ;)

I tried to bring up this issue earlier.
Unfortuately about 15 different things being transfered over bridge
netlink use 8 bits for representing a bit of information.
A bitmap selector would be a lot more efficient. Not unusual to have a
few hundred thousand entries.

cheers,
jamal

> --
> Florian
>

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