From: "Björn Töpel" <bjorn.topel@intel.com>
To: Jiri Olsa <jolsa@redhat.com>
Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com>,
Jiri Olsa <jolsa@kernel.org>, Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
netdev@vger.kernel.org, bpf@vger.kernel.org,
Andrii Nakryiko <andriin@fb.com>, Yonghong Song <yhs@fb.com>,
Martin KaFai Lau <kafai@fb.com>,
Jakub Kicinski <jakub.kicinski@netronome.com>,
David Miller <davem@redhat.com>
Subject: Re: [PATCH 5/5] bpf: Allow to resolve bpf trampoline in unwind
Date: Mon, 13 Jan 2020 13:31:38 +0100 [thread overview]
Message-ID: <9da1c8f9-7ca5-e10b-8931-6871fdbffb23@intel.com> (raw)
In-Reply-To: <a2e2b84e-71dd-e32c-bcf4-09298e9f4ce7@intel.com>
On 2020-01-13 13:21, Björn Töpel wrote:
>
> On 2020-01-13 10:43, Jiri Olsa wrote:
>> hi,
>> attached patch seems to work for me (trampoline usecase), but I don't
>> know
>> how to test it for dispatcher.. also I need to check if we need to
>> decrease
>> BPF_TRAMP_MAX or BPF_DISPATCHER_MAX, it might take more time;-)
>>
>
> Thanks for working on it! I'll take the patch for a spin.
>
> To test the dispatcher, just run XDP!
>
> With your change, the BPF_DISPATCHER_MAX is still valid. 48 entries =>
> 1890B which is < (BPF_IMAGE_SIZE / 2).
>
...and FWIW, it would be nice with bpf_dispatcher_<...> entries in
kallsyms as well. If that code could be shared with the trampoline code
as well (bpf_trampoline_<btf_id>), that'd be great!
next prev parent reply other threads:[~2020-01-13 12:31 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-29 14:37 [RFC 0/5] bpf: Add trampoline helpers Jiri Olsa
2019-12-29 14:37 ` [PATCH 1/5] bpf: Allow non struct type for btf ctx access Jiri Olsa
2020-01-06 21:36 ` Yonghong Song
2020-01-07 12:13 ` Jiri Olsa
2020-01-07 15:50 ` Jiri Olsa
2020-01-07 17:55 ` Yonghong Song
2020-01-07 18:28 ` Yonghong Song
2020-01-08 14:38 ` Jiri Olsa
2019-12-29 14:37 ` [PATCH 2/5] bpf: Add bpf_perf_event_output_kfunc Jiri Olsa
2020-01-06 23:27 ` Alexei Starovoitov
2020-01-07 12:25 ` Jiri Olsa
2020-01-07 22:13 ` Alexei Starovoitov
2020-01-08 10:24 ` Jiri Olsa
2019-12-29 14:37 ` [PATCH 3/5] bpf: Add bpf_get_stackid_kfunc Jiri Olsa
2019-12-29 14:37 ` [PATCH 4/5] bpf: Add bpf_get_stack_kfunc Jiri Olsa
2019-12-29 14:37 ` [PATCH 5/5] bpf: Allow to resolve bpf trampoline in unwind Jiri Olsa
2020-01-06 23:46 ` Alexei Starovoitov
2020-01-07 8:30 ` Daniel Borkmann
2020-01-07 13:15 ` Jiri Olsa
2020-01-07 19:30 ` Daniel Borkmann
2020-01-07 13:05 ` Jiri Olsa
2020-01-07 13:30 ` Björn Töpel
2020-01-13 9:43 ` Jiri Olsa
2020-01-13 12:21 ` Björn Töpel
2020-01-13 12:31 ` Björn Töpel [this message]
2020-01-13 12:37 ` Jiri Olsa
2020-02-03 19:58 ` Jiri Olsa
2020-02-03 20:27 ` Björn Töpel
2020-02-03 20:45 ` Toke Høiland-Jørgensen
2020-02-04 8:18 ` Jiri Olsa
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