netdev - Re: [PATCH v2 net-next 0/7] Cleanup to main DSA structures

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Message-ID: <20220105142838.uzanzmozesap63om@skbuf>
Date:   Wed, 5 Jan 2022 14:28:38 +0000
From:   Vladimir Oltean <vladimir.oltean@....com>
To:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>
Subject: Re: [PATCH v2 net-next 0/7] Cleanup to main DSA structures

On Wed, Jan 05, 2022 at 03:21:34PM +0200, Vladimir Oltean wrote:
> This series contains changes that do the following:
> 
> - struct dsa_port reduced from 576 to 544 bytes, and first cache line a
>   bit better organized
> - struct dsa_switch from 160 to 136 bytes, and first cache line a bit
>   better organized
> - struct dsa_switch_tree from 112 to 104 bytes, and first cache line a
>   bit better organized
> 
> No changes compared to v1, just split into a separate patch set.
> 
> Vladimir Oltean (7):
>   net: dsa: move dsa_port :: stp_state near dsa_port :: mac
>   net: dsa: merge all bools of struct dsa_port into a single u8
>   net: dsa: move dsa_port :: type near dsa_port :: index
>   net: dsa: merge all bools of struct dsa_switch into a single u32
>   net: dsa: make dsa_switch :: num_ports an unsigned int
>   net: dsa: move dsa_switch_tree :: ports and lags to first cache line
>   net: dsa: combine two holes in struct dsa_switch_tree
> 
>  include/net/dsa.h | 146 +++++++++++++++++++++++++---------------------
>  net/dsa/dsa2.c    |   2 +-
>  2 files changed, 81 insertions(+), 67 deletions(-)
> 
> -- 
> 2.25.1
>

Let's keep this version for review only (RFC). For the final version I
just figured that I can use this syntax:

	u8			vlan_filtering:1;

	/* Managed by DSA on user ports and by drivers on CPU and DSA ports */
	u8			learning:1;

	u8			lag_tx_enabled:1;

	u8			devlink_port_setup:1;

	u8			setup:1;

instead of this syntax:

	u8			vlan_filtering:1,
				/* Managed by DSA on user ports and by
				 * drivers on CPU and DSA ports
				 */
				learning:1,
				lag_tx_enabled:1,
				devlink_port_setup:1,
				setup:1;

which is what I'm going to prefer.