Re: [PATCH 32/32] bpf: Introduce function for outputing data to perf event

From	"Wangnan (F)" <wangnan0@huawei.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH 32/32] bpf: Introduce function for outputing data to perf event
Date	2015-08-29 04:40 +0200
Message-ID	<q2EdI-5ka-9@gated-at.bofh.it> (permalink)
References	(2 earlier) <q2Cvf-2JO-3@gated-at.bofh.it> <q2D7Y-3I2-11@gated-at.bofh.it> <q2DhD-3Tb-1@gated-at.bofh.it> <q2DUl-4XT-7@gated-at.bofh.it> <q2E42-592-7@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On 2015/8/29 10:22, Alexei Starovoitov wrote:
> On 8/28/15 7:15 PM, Wangnan (F) wrote:
>> I'd like to see whether it is possible to create dynamic tracepoints so
>> different receivers can listen on different tracepoints.
>
> see my proposal A. I think ftrace instances might work for this.
>
> I'm not sure about 'format' part though. Kernel side shouldn't be
> aware of it. It's only the contract between bpf program and user process
> that deals with it.
>
It is an option. Let's keep an open mind now :)

For current patch 32/32, I think it is useful enough for some simple cases,
and we have already start using it internally. What about keep it as what it
is now and create a independent method for your usecase?

Thank you.

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Thread

[PATCH 32/32] bpf: Introduce function for outputing data to perf event Wang Nan <wangnan0@huawei.com> - 2015-08-28 09:10 +0200
  Re: [PATCH 32/32] bpf: Introduce function for outputing data to perf  event Alexei Starovoitov <ast@plumgrid.com> - 2015-08-29 02:50 +0200
    Re: [PATCH 32/32] bpf: Introduce function for outputing data to perf  event "Wangnan (F)" <wangnan0@huawei.com> - 2015-08-29 03:30 +0200
      Re: [PATCH 32/32] bpf: Introduce function for outputing data to perf  event Alexei Starovoitov <ast@plumgrid.com> - 2015-08-29 03:40 +0200
        Re: [PATCH 32/32] bpf: Introduce function for outputing data to perf  event "Wangnan (F)" <wangnan0@huawei.com> - 2015-08-29 04:20 +0200
          Re: [PATCH 32/32] bpf: Introduce function for outputing data to perf  event Alexei Starovoitov <ast@plumgrid.com> - 2015-08-29 04:30 +0200
            Re: [PATCH 32/32] bpf: Introduce function for outputing data to perf  event "Wangnan (F)" <wangnan0@huawei.com> - 2015-08-29 04:40 +0200
              Re: [PATCH 32/32] bpf: Introduce function for outputing data to perf  event Alexei Starovoitov <ast@plumgrid.com> - 2015-08-29 05:00 +0200
                Re: [PATCH 32/32] bpf: Introduce function for outputing data to perf  event "Wangnan (F)" <wangnan0@huawei.com> - 2015-08-29 05:00 +0200

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