[bpf-next,0/2] flexible size for bpf_prog_pack

Message

Song Liu Feb. 10, 2022, 6:41 a.m. UTC

There are two issues with bpf_prog_pack:

(1) On NUMA systems, bpf_prog_pack need to be bigger
    (PMD_SIZE * num_online_nodes) to use huge pages.
(2) If the system doesn't support huge pages (nohugevmalloc in cmdline),
    allocating PMD_SIZE for bpf_prog_pack is a waste.

Address these issues with flexible bpf_prog_pack_size().

Song Liu (2):
  vmalloc: expose vmap_allow_huge via get_vmap_allow_huge()
  bpf: flexible size for bpf_prog_pack

 include/linux/vmalloc.h |  1 +
 kernel/bpf/core.c       | 47 +++++++++++++++++++++++------------------
 mm/vmalloc.c            |  5 +++++
 3 files changed, 33 insertions(+), 20 deletions(-)

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2.30.2