netdev - Re: [PATCH v8 bpf-next 6/9] bpf: introduce BPF_RAW

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Message-ID: <2a0f6ac2-b13e-b8ad-31b4-a42909a34efa@fb.com>
Date:   Wed, 28 Mar 2018 12:38:48 -0700
From:   Alexei Starovoitov <ast@...com>
To:     Steven Rostedt <rostedt@...dmis.org>,
        Alexei Starovoitov <ast@...nel.org>
CC:     <davem@...emloft.net>, <daniel@...earbox.net>,
        <torvalds@...ux-foundation.org>, <peterz@...radead.org>,
        <mathieu.desnoyers@...icios.com>, <netdev@...r.kernel.org>,
        <kernel-team@...com>, <linux-api@...r.kernel.org>
Subject: Re: [PATCH v8 bpf-next 6/9] bpf: introduce BPF_RAW_TRACEPOINT

On 3/28/18 12:34 PM, Steven Rostedt wrote:
> On Wed, 28 Mar 2018 12:05:37 -0700
> Alexei Starovoitov <ast@...nel.org> wrote:
>
>> +++ b/include/linux/tracepoint-defs.h
>> @@ -35,4 +35,10 @@ struct tracepoint {
>>  	struct tracepoint_func __rcu *funcs;
>>  };
>>
>> +struct bpf_raw_event_map {
>> +	struct tracepoint	*tp;
>> +	void			*bpf_func;
>> +	u32			num_args;
>> +} __aligned(32);
>> +
>
> If you prefer v7, I'm fine with that. For cache issues, I can pull out
> the funcs from the tracepoint structure like I posted.

I very much prefer to land this v8 as-is and optimize later.

I still have bpfilter/microkernel patches to finish which were
practically ready two weeks ago and got delayed but this set.