Re: [Patch net-next v2] net_sched: get rid of rcu_barrier() in tcf_block_put_ext()

From: Cong Wang <redacted>
Date: Mon,  4 Dec 2017 10:48:18 -0800

Both Eric and Paolo noticed the rcu_barrier() we use in
tcf_block_put_ext() could be a performance bottleneck when
we have a lot of tc classes.

Paolo provided the following to demonstrate the issue:

 ...

Tested-by: Paolo Abeni <pabeni@redhat.com>
Cc: Eric Dumazet <redacted>
Cc: Jiri Pirko <redacted>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Cong Wang <redacted>

Applied.