On Fri, Jun 5, 2015 at 10:46 AM, Eric Christopher <echristo at gmail.com>
wrote:> As one of the people who has worked with and reviewed the BPF port I'm
in
> favor of this move.
>
> Reasons:
>
> 1) Alexei has been very active on the port, fixing problems unprompted
> 2) As one of the people who've had to had on it in the last few months
it
> wasn't an issue to keep up to date with the other ports.
>
> Unless there are objections by EOD Monday I feel confident making the call
> here and having Alexei add it to the list of official targets.
Thanks Eric!
Bumping the thread one more time.
>
> -eric
>
>
> On Fri, Jun 5, 2015 at 9:59 AM Alexei Starovoitov
> <alexei.starovoitov at gmail.com> wrote:
>>
>> Hi All,
>>
>> I'd like to propose to upgrade BPF backend to first class citizen.
>>
>> Current status of it:
>> - used with linux kernel on x64, arm64, s390 architectures
>> - projects that use it: perf, tc, ovs
>> - there are few front-ends in the works:
>> . one is translating custom language to C and then using clang/llvm
>> . another is generating llvm IR directly
>> . yet another is using clang rewriter to augment C language
>> for tracing/networking needs
>> . one project tried to hack clang overall and was abandoned
>> . p4->bpf project was announced yesterday
>> - I've seen people embedding binary llc with bpf support
>> in their github projects.
>> - broken llvm build with bpf backend was reported many
>> times with few folks even provided simple patches to unbreak it.
>> - we've started to prepare buildbot specific to bpf, but hit
>> configuration issues with zorg. Hopefully it will be functional soon.
>> - as far as I can see all across the board api refactoring that
>> was done by a bunch of people over the last 5 month
>> didn't cause any problems for them or for the backend
>> - it was accidentally included in the last night builds and
>> reverted today. There were no buildbot issues (afaik)
>> - recent press:
>> http://brendangregg.com/blog/2015-05-15/ebpf-one-small-step.html
>>
>> bpf backend has been in-tree since January and has quite a few
>> users, so I think it's time to graduate it from experimental.
>>
>> Thanks!