[cfe-dev] Adding clang extension support for BPF CO-RE relocation support

[John McCall via cfe-dev]

On 6 Jan 2022, at 7:51, Aaron Ballman wrote:
> On Wed, Jan 5, 2022 at 11:33 PM Y Song <ys114321 at gmail.com> wrote:
>> On Wed, Jan 5, 2022 at 6:36 PM John McCall <rjmccall at apple.com> wrote:
>>> On 5 Jan 2022, at 14:52, Y Song wrote:
>>>> On Mon, Jan 3, 2022 at 11:40 AM Aaron Ballman <aaron at aaronballman.com>
>>>> wrote:
>>>>> On Mon, Dec 20, 2021 at 7:00 PM Y Song <ys114321 at gmail.com> wrote:
>>>>>> Representation within the appropriate governing organization
>>>>>> ============================================================
>>>>>>
>>>>>> N/A
>>>>>
>>>>> What organization determines things like the specification you posted
>>>>> above, or is there no organization behind these efforts?
>>>>
>>>> The BPF foundation (https://ebpf.io/foundation/) is responsible for
>>>> the specification. The general discussion (specification, loader
>>>> implementation, etc.)
>>>> also happened in mailing list https://lore.kernel.org/bpf/.
>>>
>>> Okay, thanks, this is what we’re looking for here.
>>>
>>>>>> A long-term support plan
>>>>>> ========================
>>>>>>
>>>>>> The feature will be supported for ever.
>>>>>
>>>>> This is not a long term support plan. :-) When we have support needs
>>>>> in the future, will there be people/a company/a community available
>>>>> to
>>>>> do that work or is the expectation that once this lands, the Clang
>>>>> community is responsible for it? (This matters with the above
>>>>> question
>>>>> about the organization responsible for governing the specification --
>>>>> can the Clang community do as they please here or do we need to
>>>>> coordinate with others?)
>>>>
>>>> The best place probably is to engage with the mailing list
>>>> https://lore.kernel.org/bpf/.
>>>> People can also reach the bpf foundation for guidance/direction.
>>>
>>> Okay.  Just so we know, I assume you’re part of the BPF community?
>>
>> Yes, I am part of BPF community, and also part of
>> LLVM community as I maintain the clang/llvm BPF backend with
>> Alexei Starovoitov.
>
> Thank you, that's good information!
>
>>> Are you doing this by yourself, or is there a larger institution
>>> supporting your efforts (for example, a company or university)?
>>
>> I am a software engineer from Meta (former Facebook). I am in
>> the linux kernel team. Supporting the bpf community is part of my job,
>> which benefits Meta too.
>
> Thank you for this as well!
>
>>> I’m sorry to pry, but we actually don’t have any information about
>>> you except a gmail address. :)
>>
>> No problem! If the community has any questions regarding to
>> BPF/BTF support in clang/llvm, they can reach me, Alexei, or
>> bpf mailing list and we are glad to help.
>
> Thanks! FWIW, the fact that this is backed by both the Linux kernel
> team and has some corporate support from Meta makes me more
> comfortable that long-term support isn't likely to cause an undue
> burden for us.

Completely agreed.

John.