Re: [Patch bpf-next v2 0/5] bpf: introduce timeout map

On Mon, Dec 14, 2020 at 12:13 PM Cong Wang [off-list ref] wrote:

From: Cong Wang <redacted>

This patchset introduces a new bpf hash map which has timeout.

It's a bit too short a cover letter for a pretty major new type of
hash maps. Please expand on the problem it's trying to solve, how you
tested and benchmarked it, etc.

Patch 1 is a preparation, patch 2 is the implementation of timeout
map, patch 3 updates an existing hash map ptr test, patch 4 and
patch 5 contain two test cases for timeout map.

Please check each patch description for more details.

---
v2: fix hashmap ptr test
    add a test case in map ptr test
    factor out htab_timeout_map_alloc()

Cong Wang (5):
  bpf: use index instead of hash for map_locked[]
  bpf: introduce timeout map
  selftests/bpf: update elem_size check in map ptr test
  selftests/bpf: add a test case for bpf timeout map
  selftests/bpf: add timeout map check in map_ptr tests

 include/linux/bpf_types.h                     |   1 +
 include/uapi/linux/bpf.h                      |   3 +-
 kernel/bpf/hashtab.c                          | 301 ++++++++++++++++--
 kernel/bpf/syscall.c                          |   3 +-
 tools/include/uapi/linux/bpf.h                |   1 +
 .../selftests/bpf/progs/map_ptr_kern.c        |  22 +-
 tools/testing/selftests/bpf/test_maps.c       |  41 +++
 7 files changed, 340 insertions(+), 32 deletions(-)

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2.25.1