netdev - Re: [PATCH net-next] ipv6: use call_rcu_hurry() in fib6_info

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Date: Fri, 26 Apr 2024 13:21:53 +0200
From: Jiri Pirko <jiri@...nulli.us>
To: Eric Dumazet <edumazet@...gle.com>
Cc: "David S . Miller" <davem@...emloft.net>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	David Ahern <dsahern@...nel.org>, netdev@...r.kernel.org,
	eric.dumazet@...il.com
Subject: Re: [PATCH net-next] ipv6: use call_rcu_hurry() in
 fib6_info_release()

Fri, Apr 26, 2024 at 12:47:22PM CEST, edumazet@...gle.com wrote:
>This is a followup of commit c4e86b4363ac ("net: add two more
>call_rcu_hurry()")
>
>fib6_info_destroy_rcu() is calling nexthop_put() or fib6_nh_release()
>
>We must not delay it too much or risk unregister_netdevice/ref_tracker
>traces because references to netdev are not released in time.
>
>This should speedup device/netns dismantles when CONFIG_RCU_LAZY=y
>
>Signed-off-by: Eric Dumazet <edumazet@...gle.com>

Reviewed-by: Jiri Pirko <jiri@...dia.com>