netdev - Re: [PATCH] net-udp: deprioritize cpu match for udp socket lookup

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Date:   Fri, 07 Dec 2018 16:16:27 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     zenczykowski@...il.com
Cc:     maze@...gle.com, edumazet@...gle.com, netdev@...r.kernel.org
Subject: Re: [PATCH] net-udp: deprioritize cpu match for udp socket lookup

From: Maciej Żenczykowski <zenczykowski@...il.com>
Date: Wed,  5 Dec 2018 12:59:17 -0800

> From: Maciej Żenczykowski <maze@...gle.com>
> 
> During udp socket lookup cpu match should be lowest priority,
> hence it should increase score by only 1.
> 
> The next priority is delivering v4 to v4 sockets, and v6 to v6 sockets.
> The v6 code path doesn't have to deal with this so it always gets
> a score of '4'.  The v4 code path uses '4' or '2' depending on
> whether we're delivering to a v4 socket or a dualstack v6 socket.
> 
> This is more important than cpu match, so has to be greater than
> the '1' bump in score from cpu match.
> 
> All other matches (src/dst ip, src port) are even *more* important,
> so need to bump score by 4 for ipv4.
> 
> For ipv6 we could simply bump by 2, but let's keep the two code
> paths as similar as possible.
> 
> (also, while at it, remove two unnecessary unconditional score bumps)
> 
> Signed-off-by: Maciej Żenczykowski <maze@...gle.com>

This doesn't apply to the current net tree.

Also "net-udp: " is a weird subsystem prefix, just use "udp: ".

Thank you.