On Fri, 20 Oct 2023 19:43:53 +0530, Hari Bathini wrote:

Most BPF programs are small, but they consume a page each. For systems
with busy traffic and many BPF programs, this may also add significant
pressure on instruction TLB. High iTLB pressure usually slows down the
whole system causing visible performance degradation for production
workloads.

bpf_prog_pack, a customized allocator that packs multiple bpf programs
into preallocated memory chunks, was proposed [1] to address it. This
series extends this support on powerpc.

[...]

Applied to powerpc/next.

[1/5] powerpc/code-patching: introduce patch_instructions()
      https://git.kernel.org/powerpc/c/465cabc97b42405eb89380ea6ba8d8b03e4ae1a2
[2/5] powerpc/bpf: implement bpf_arch_text_copy
      https://git.kernel.org/powerpc/c/6efc1675acb88eef45ef0156b93f95d66a8ee759
[3/5] powerpc/bpf: implement bpf_arch_text_invalidate for bpf_prog_pack
      https://git.kernel.org/powerpc/c/033ffaf0af1f974ecf401db3f70aae6fe1a90fc5
[4/5] powerpc/bpf: rename powerpc64_jit_data to powerpc_jit_data
      https://git.kernel.org/powerpc/c/de04e40600ae15fa5e484be242e74aad6de7418f
[5/5] powerpc/bpf: use bpf_jit_binary_pack_[alloc|finalize|free]
      https://git.kernel.org/powerpc/c/90d862f370b6e9de1b5d607843c5a2f9823990f3

cheers