netdev - Re: [PATCH net-next 13/14] ipv6: lockless IPV6_MTU

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Message-ID: <bd4dad72-2f4f-79a0-8660-fd5ea6f95c06@kernel.org>
Date: Thu, 14 Sep 2023 09:10:20 -0600
From: David Ahern <dsahern@...nel.org>
To: Eric Dumazet <edumazet@...gle.com>, "David S . Miller"
 <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>,
 Paolo Abeni <pabeni@...hat.com>
Cc: netdev@...r.kernel.org, eric.dumazet@...il.com
Subject: Re: [PATCH net-next 13/14] ipv6: lockless IPV6_MTU_DISCOVER
 implementation

On 9/12/23 10:02 AM, Eric Dumazet wrote:
> Most np->pmtudisc reads are racy.
> 
> Move this 3bit field on a full byte, add annotations
> and make IPV6_MTU_DISCOVER setsockopt() lockless.
> 
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> ---
>  include/linux/ipv6.h            |  5 ++---
>  include/net/ip6_route.h         | 14 +++++++++-----
>  net/ipv6/ip6_output.c           |  4 ++--
>  net/ipv6/ipv6_sockglue.c        | 17 ++++++++---------
>  net/ipv6/raw.c                  |  2 +-
>  net/ipv6/udp.c                  |  2 +-
>  net/netfilter/ipvs/ip_vs_sync.c |  2 +-
>  7 files changed, 24 insertions(+), 22 deletions(-)
> 

Reviewed-by: David Ahern <dsahern@...nel.org>