Re: [PATCH bpf-next/net 0/6] bpf: Allow opt-out from sk->sk_prot->memory_allocated.

Kuniyuki Iwashima [off-list ref] writes:

This series allows opting out of the global per-protocol memory
accounting if socket is configured as such by sysctl or BPF prog.

This series is v11 of the series below [0], but I start as a new series
because the changes now fall in net and bpf subsystems only.

I discussed with Roman Gushchin offlist, and he suggested not mixing
two independent subsystems and it would be cleaner not to depend on
memcg.

So, sk->sk_memcg and memcg code are no longer touched, and instead we
use another hole near sk->sk_prot to store a flag for the net feature.

Overview of the series:

  patch 1 is misc cleanup
  patch 2 allows opt-out from sk->sk_prot->memory_allocated
  patch 3 introduces net.core.bypass_prot_mem
  patch 4 & 5 supports flagging sk->sk_bypass_prot_mem via bpf_setsockopt()
  patch 6 is selftest

Acked-by: Roman Gushchin <roman.gushchin@linux.dev>
for the series.

Thanks!