netdev - Re: [PATCH net-next 9/9] net: bridge: pack net

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Date:   Wed, 26 Sep 2018 16:35:49 +0300
From:   Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
To:     Ido Schimmel <idosch@...sch.org>
Cc:     netdev@...r.kernel.org, roopa@...ulusnetworks.com,
        davem@...emloft.net, stephen@...workplumber.org,
        bridge@...ts.linux-foundation.org
Subject: Re: [PATCH net-next 9/9] net: bridge: pack net_bridge better

On 26/09/18 16:30, Ido Schimmel wrote:
> On Wed, Sep 26, 2018 at 03:18:02PM +0300, Nikolay Aleksandrov wrote:
>> Further reduce the size of net_bridge with 8 bytes and reduce the number of
>> holes in it:
>>  Before: holes: 5, sum holes: 15
>>  After: holes: 2, sum holes: 3
>>
>> Also as a bonus we get offload_fwd_mark in the first cache line and remove
>> the need to pull the last cache line of net_bridge just for that member in
>> fast path (should_deliver -> nbp_switchdev_allowed_egress).
> 
> But nbp_switchdev_allowed_egress() compares with 'offload_fwd_mark' from
> 'net_bridge_port', not 'net_bridge'...
> 

ha, right you are! I need to check my glasses :) Anyway, I'll correct my
commit message and resend v2. We can leave the net_bridge mark in the
end, there're 4 bytes there anyway.

I was thinking of net_bridge_port, but that is a different patch-set I
have. Apparently I've mixed the commit messages.

Thanks!