netdev - [PATCH bpf-next v2 0/2] bpf: misc performance improvements for cgroup hooks

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Date:   Mon,  4 Jan 2021 14:14:52 -0800
From:   Stanislav Fomichev <sdf@...gle.com>
To:     netdev@...r.kernel.org, bpf@...r.kernel.org
Cc:     ast@...nel.org, daniel@...earbox.net,
        Stanislav Fomichev <sdf@...gle.com>
Subject: [PATCH bpf-next v2 0/2] bpf: misc performance improvements for cgroup hooks

First patch tries to remove kzalloc/kfree from getsockopt for the
common cases.

Second patch switches cgroup_bpf_enabled to be per-attach to
to add only overhead for the cgroup attach types used on the system.

No visible user-side changes.

v2:
- perf numbers for getsockopt kmalloc reduction (Song Liu)
- (sk) in BPF_CGROUP_PRE_CONNECT_ENABLED (Song Liu)
- 128 -> 64 buffer size, BUILD_BUG_ON (Martin KaFai Lau)

Stanislav Fomichev (2):
  bpf: try to avoid kzalloc in cgroup/{s,g}etsockopt
  bpf: split cgroup_bpf_enabled per attach type

 include/linux/bpf-cgroup.h | 36 +++++++++++++------------
 include/linux/filter.h     |  3 +++
 kernel/bpf/cgroup.c        | 54 +++++++++++++++++++++++++++++++-------
 net/ipv4/af_inet.c         |  9 ++++---
 net/ipv4/udp.c             |  7 +++--
 net/ipv6/af_inet6.c        |  9 ++++---
 net/ipv6/udp.c             |  7 +++--
 7 files changed, 83 insertions(+), 42 deletions(-)

-- 
2.29.2.729.g45daf8777d-goog