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Message-ID: <8633a76b-84c1-44c1-f532-ce66c1502b5c@gmail.com>
Date:   Mon, 8 Feb 2021 19:31:06 +0100
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Taehee Yoo <ap420073@...il.com>, davem@...emloft.net,
        kuba@...nel.org, netdev@...r.kernel.org, dsahern@...nel.org,
        xiyou.wangcong@...il.com
Subject: Re: [PATCH net-next 7/8] mld: convert ip6_sf_socklist to list macros



On 2/8/21 6:58 PM, Taehee Yoo wrote:
> Currently, struct ip6_sf_socklist doesn't use list API so that code
> shape is a little bit different from others.
> So it converts ip6_sf_socklist to use list API so it would
> improve readability.
> 
> Signed-off-by: Taehee Yoo <ap420073@...il.com>
> ---
>  include/net/if_inet6.h  |  19 +-
>  include/uapi/linux/in.h |   4 +-
>  net/ipv6/mcast.c        | 387 +++++++++++++++++++++++++---------------
>  3 files changed, 256 insertions(+), 154 deletions(-)
> 
> diff --git a/include/net/if_inet6.h b/include/net/if_inet6.h
> index babf19c27b29..6885ab8ec2e9 100644
> --- a/include/net/if_inet6.h
> +++ b/include/net/if_inet6.h
> @@ -13,6 +13,7 @@
>  #include <net/snmp.h>
>  #include <linux/ipv6.h>
>  #include <linux/refcount.h>
> +#include <linux/types.h>
>  
>  /* inet6_dev.if_flags */
>  
> @@ -76,23 +77,19 @@ struct inet6_ifaddr {
>  };
>  
>  struct ip6_sf_socklist {
> -	unsigned int		sl_max;
> -	unsigned int		sl_count;
> -	struct in6_addr		sl_addr[];
> +	struct list_head	list;
> +	struct in6_addr		sl_addr;
> +	struct rcu_head		rcu;
>  };
>

I dunno about readability, but :

Your patches adds/delete more than 1000 lines, who is really going to review this ?

You replace dense arrays by lists, so the performance will likely be hurt,
as cpu caches will be poorly used.


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