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Date:   Tue, 15 May 2018 10:20:43 +0200
From:   Jiri Pirko <jiri@resnulli.us>
To:     Jamal Hadi Salim <jhs@mojatatu.com>
Cc:     Vlad Buslov <vladbu@mellanox.com>, netdev@vger.kernel.org,
        davem@davemloft.net, xiyou.wangcong@gmail.com, pablo@netfilter.org,
        kadlec@blackhole.kfki.hu, fw@strlen.de, ast@kernel.org,
        daniel@iogearbox.net, edumazet@google.com, keescook@chromium.org,
        linux-kernel@vger.kernel.org, netfilter-devel@vger.kernel.org,
        coreteam@netfilter.org, kliteyn@mellanox.com
Subject: Re: [PATCH 00/14] Modify action API for implementing lockless actions
Message-ID: <20180515082043.GH2134@nanopsycho.orion>
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 <23f37e5a-dd30-0ad3-a5ab-df22bf0ad7f9@mojatatu.com>
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Mon, May 14, 2018 at 08:03:20PM CEST, jhs@mojatatu.com wrote:
>On 14/05/18 10:27 AM, Vlad Buslov wrote:
>> Currently, all netlink protocol handlers for updating rules, actions and
>> qdiscs are protected with single global rtnl lock which removes any
>> possibility for parallelism. This patch set is a first step to remove
>> rtnl lock dependency from TC rules update path. It updates act API to
>> use atomic operations, rcu and spinlocks for fine-grained locking. It
>> also extend API with functions that are needed to update existing
>> actions for parallel execution.
>> 
>> Outline of changes:
>> - Change tc action to use atomic reference and bind counters, rcu
>>    mechanism for cookie update.
>> - Extend action ops API with 'delete' function and 'unlocked' flag.
>> - Change action API to work with actions in lockless manner based on
>>    primitives implemented in previous patches.
>> - Extend action API with new functions necessary to implement unlocked
>>    actions.
>
>Please run all the tdc tests with these changes. This area has almost
>good test coverage at this point. If you need help just ping me.

Oh, that reminds me. Vlad, please run also:
tools/testing/selftests/net/forwarding/tc_*

Thanks!