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| H A D | inet_fragment.c | diff 802e12ff9cbff3bafb0b6f0fe79cff04dce9de16 Thu Apr 04 15:07:51 CEST 2024 Eric Dumazet <edumazet@google.com> inet: frags: delay fqdir_free_fn()
fqdir_free_fn() is using very expensive rcu_barrier()
When one netns is dismantled, we often call fqdir_exit()
multiple times, typically lauching fqdir_free_fn() twice.
Delaying by one second fqdir_free_fn() helps to reduce
the number of rcu_barrier() calls, and lock contention
on rcu_state.barrier_mutex.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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