minutes: IO Visort TSC/Dev Meeting


Brenden Blanco
 

Hi All,

Thanks for attending the meeting today. As usual, here are my notes.

Cheers,
Brenden

=== Discussion ===

Alexei
- bpf-next queue is quite large, please have patience with delays in clearing
  the backlog
- please help review others patches

Brenden
- Fixing image test issues in bcc
- To add python3 test infra

Yonghong
- some kernel fixes
- python3 script fixes
- asking for help adding python3 tests
- please help review bpfd changes

Jesper
- debugging performance regression, retpoline issue
  - getting help from dma experts
  - other issues may come with map lookup indirect accesses
- followup patches from xdp page return api

Sebastiano
- add map+prog id to tracepoint
  - can it be done with kprobe + tracepoint?
  - what is the use case, since it can already be done other ways?

Bjorn
- AF_XDP updates
  - non-rfc patchset to push asap
  - looking at different ring implementations
  - alternatives are each visible api change

Daniel
- Documentation guide!
  - http://cilium.readthedocs.io/en/latest/bpf/

William
- Trying AF_XDP
  - seeing if can be used by ovs datapath
  - seeing different perf numbers, 10g ixgbe
  - will try again with next patch spin
- Moving around examples/selftest code
- Some missing ipv6 tunnel test code

Jiong
- Control flow graph in verifier
  - dom tree to detect loops
  - please post rfc patches

Martin
- BTF patches posted
  - whether to have embedded pretty printer in the kernel
  - possible use in embedded environments to avoid extra binaries
  - should never support writing to maps from bpffs
  - bpftool should be main point of entry

=== Attendees ===
Alexei Starovoitov
Brenden Blanco
William Tu
Andy Gospodarek
Bjorn Topel
Daniel Borkmann
Jakub Kicinski
Jesper Brouer
Jiong Wang
Quentin Monnet
Sandipan
Sebastiano
Ferris
George Wilson
Yonghong Song
Martin Lau
Brendan Gregg
Alex Reece
Joe Stringer
Yi-Hung Wei

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