netdev - [PATCH net-next 0/4] ipv4: preliminary work for per-netns RTNL

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Message-ID: <20241004134720.579244-1-edumazet@google.com>
Date: Fri,  4 Oct 2024 13:47:16 +0000
From: Eric Dumazet <edumazet@...gle.com>
To: "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, 
	Paolo Abeni <pabeni@...hat.com>
Cc: David Ahern <dsahern@...nel.org>, Kuniyuki Iwashima <kuniyu@...zon.com>, 
	Alexandre Ferrieux <alexandre.ferrieux@...nge.com>, netdev@...r.kernel.org, 
	eric.dumazet@...il.com, Eric Dumazet <edumazet@...gle.com>
Subject: [PATCH net-next 0/4] ipv4: preliminary work for per-netns RTNL

Inspired by 9b8ca04854fd ("ipv4: avoid quadratic behavior in
FIB insertion of common address") and per-netns RTNL conversion
started by Kuniyuki this week.

ip_fib_check_default() can use RCU instead of a shared spinlock.

fib_info_lock can be removed, RTNL is already used.

fib_info_devhash[] can be removed in favor of a single
pointer in net_device.

Eric Dumazet (4):
  ipv4: remove fib_devindex_hashfn()
  ipv4: use rcu in ip_fib_check_default()
  ipv4: remove fib_info_lock
  ipv4: remove fib_info_devhash[]

 .../networking/net_cachelines/net_device.rst  |  1 +
 include/linux/netdevice.h                     |  2 +
 net/ipv4/fib_semantics.c                      | 77 +++++++------------
 3 files changed, 31 insertions(+), 49 deletions(-)

-- 
2.47.0.rc0.187.ge670bccf7e-goog