From: Alexei Starovoitov <ast@fb.com>
To: Song Liu <songliubraving@fb.com>, David Ahern <dsahern@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
Netdev <netdev@vger.kernel.org>,
lkml <linux-kernel@vger.kernel.org>,
Kernel Team <Kernel-team@fb.com>,
"ast@kernel.org" <ast@kernel.org>,
"daniel@iogearbox.net" <daniel@iogearbox.net>,
"acme@kernel.org" <acme@kernel.org>
Subject: Re: [RFC perf,bpf 1/5] perf, bpf: Introduce PERF_RECORD_BPF_EVENT
Date: Fri, 9 Nov 2018 19:14:39 +0000 [thread overview]
Message-ID: <6907d1cd-b132-1aa4-c69e-5277d2d26262@fb.com> (raw)
In-Reply-To: <74246BC0-EA66-407E-93E6-0D6E8645F486@fb.com>
On 11/9/18 10:49 AM, Song Liu wrote:
>
>
>> On Nov 9, 2018, at 9:08 AM, David Ahern <dsahern@gmail.com> wrote:
>>
>> On 11/8/18 11:49 AM, Song Liu wrote:
>>> Could you please point me to more information about the use cases you worry
>>> about? I am more than happy to optimize the logic for those use cases.
>>
>> bpf load and unload as just another tracepoint to throw into a set of
>> events that are monitored. As mentioned before auditing the loads and
>> unloads is one example.
>
> For the tracepoint approach, we need similar synchronous logic in perf to
> process BPF load/unload events. If we agree this is the right direction,
> I will modify the set with tracepoints.
we had tracepoints in bpf core. We removed it.
I don't think we'll be going back.
next prev parent reply other threads:[~2018-11-09 19:15 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-06 20:52 [RFC perf,bpf 0/5] reveal invisible bpf programs Song Liu
2018-11-06 20:52 ` [RFC perf,bpf 1/5] perf, bpf: Introduce PERF_RECORD_BPF_EVENT Song Liu
2018-11-07 8:40 ` Peter Zijlstra
2018-11-07 18:25 ` Song Liu
2018-11-08 15:00 ` Peter Zijlstra
2018-11-08 18:04 ` Song Liu
2018-11-08 18:26 ` David Ahern
2018-11-08 18:49 ` Song Liu
2018-11-09 17:08 ` David Ahern
2018-11-09 18:49 ` Song Liu
2018-11-09 19:14 ` Alexei Starovoitov [this message]
2018-11-06 20:52 ` [RFC perf,bpf 2/5] perf: sync tools/include/uapi/linux/perf_event.h Song Liu
2018-11-06 20:52 ` [RFC perf,bpf 3/5] perf util: basic handling of PERF_RECORD_BPF_EVENT Song Liu
2018-11-06 20:52 ` [RFC perf,bpf 4/5] perf util: introduce bpf_prog_info_event Song Liu
2018-11-06 21:11 ` Alexei Starovoitov
2018-11-06 20:52 ` [RFC perf,bpf 5/5] perf util: generate bpf_prog_info_event for short living bpf programs Song Liu
2018-11-06 21:54 ` David Ahern
2018-11-06 23:17 ` Song Liu
2018-11-06 23:29 ` Alexei Starovoitov
2018-11-06 23:36 ` David Miller
2018-11-07 0:13 ` Alexei Starovoitov
2018-11-07 0:23 ` David Ahern
2018-11-07 0:26 ` Alexei Starovoitov
2018-11-07 0:44 ` David Ahern
2018-11-07 1:09 ` Alexei Starovoitov
2018-11-07 18:12 ` David Ahern
2018-11-07 18:28 ` Song Liu
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