netdev - Re: [PATCH net-next 2/2] Create netdev->neighbour association

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Message-ID: <20241003112629.GL1310185@kernel.org>
Date: Thu, 3 Oct 2024 12:26:29 +0100
From: Simon Horman <horms@...nel.org>
To: Gilad Naaman <gnaaman@...venets.com>
Cc: netdev <netdev@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>
Subject: Re: [PATCH net-next 2/2] Create netdev->neighbour association

On Tue, Oct 01, 2024 at 05:09:57AM +0000, Gilad Naaman wrote:
> Create a mapping between a netdev and its neighoburs,
> allowing for much cheaper flushes.
> 
> Signed-off-by: Gilad Naaman <gnaaman@...venets.com>

Hi Gilad,

As per my comment on patch 1/2, This is not a full review, but rather some
feedback to take into account once a proper review arrives.

...

> diff --git a/Documentation/networking/net_cachelines/net_device.rst b/Documentation/networking/net_cachelines/net_device.rst

...

> diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h

...

> @@ -2399,6 +2400,8 @@ struct net_device {
>  	/** @irq_moder: dim parameters used if IS_ENABLED(CONFIG_DIMLIB). */
>  	struct dim_irq_moder	*irq_moder;
>  
> +	struct hlist_head neighbours[NEIGH_NR_TABLES];
> +

Please add an entry for neighbours in the Kernel doc for this
structure, which is immediately above it.

This is flagged by ./scripts/kernel-doc -none, and W=1 allmodconfig builds.

>  	u8			priv[] ____cacheline_aligned
>  				       __counted_by(priv_len);
>  } ____cacheline_aligned;

...