[PATCH v3 bpf-next 0/5] bpf: Use bpf_mem_cache_alloc/free in bpf_local_storage

[Martin KaFai Lau <martin.lau@linux.dev>]

From: Martin KaFai Lau <martin.lau@kernel.org>

This set is a continuation of the effort in using
bpf_mem_cache_alloc/free in bpf_local_storage [1]

Major change is only using bpf_mem_alloc for task and cgrp storage
while sk and inode stay with kzalloc/kfree. The details is
in patch 2.

[1]: https://lore.kernel.org/bpf/20230308065936.1550103-1-martin.lau@linux.dev/

v3:
- Only use bpf_mem_alloc for task and cgrp storage.
- sk and inode storage stay with kzalloc/kfree.
- Check NULL and add comments in bpf_mem_cache_raw_free() in patch 1.
- Added test and benchmark for task storage.

v2:
- Added bpf_mem_cache_alloc_flags() and bpf_mem_cache_raw_free()
  to hide the internal data structure of the bpf allocator.
- Fixed a typo bug in bpf_selem_free()
- Simplified the test_local_storage test by directly using
  err returned from libbpf

Martin KaFai Lau (5):
  bpf: Add a few bpf mem allocator functions
  bpf: Use bpf_mem_cache_alloc/free in bpf_local_storage_elem
  bpf: Use bpf_mem_cache_alloc/free for bpf_local_storage
  selftests/bpf: Test task storage when local_storage->smap is NULL
  selftests/bpf: Add bench for task storage creation

 include/linux/bpf_local_storage.h             |   7 +-
 include/linux/bpf_mem_alloc.h                 |   2 +
 kernel/bpf/bpf_cgrp_storage.c                 |   2 +-
 kernel/bpf/bpf_inode_storage.c                |   2 +-
 kernel/bpf/bpf_local_storage.c                | 223 ++++++++++++++++--
 kernel/bpf/bpf_task_storage.c                 |   2 +-
 kernel/bpf/memalloc.c                         |  59 ++++-
 net/core/bpf_sk_storage.c                     |   2 +-
 tools/testing/selftests/bpf/bench.c           |   2 +
 .../bpf/benchs/bench_local_storage_create.c   | 151 ++++++++++--
 .../bpf/prog_tests/test_local_storage.c       |   7 +-
 .../bpf/progs/bench_local_storage_create.c    |  25 ++
 .../selftests/bpf/progs/local_storage.c       |  56 +++--
 13 files changed, 472 insertions(+), 68 deletions(-)

-- 
2.34.1