The selftest verif_scale_strobemeta_subprogs failed with latest llvm19 compiler. For example, $ ./test_progs -n 498 ... libbpf: prog 'on_event': BPF program load failed: Permission denied libbpf: prog 'on_event': -- BEGIN PROG LOAD LOG -- combined stack size of 4 calls is 544. Too large verification time 1417195 usec stack depth 24+440+0+32 processed 53561 insns (limit 1000000) max_states_per_insn 18 total_states 1457 peak_states 308 mark_read 146 -- END PROG LOAD LOG -- libbpf: prog 'on_event': failed to load: -13 libbpf: failed to load object 'strobemeta_subprogs.bpf.o' scale_test:FAIL:expect_success unexpected error: -13 (errno 13) #498 verif_scale_strobemeta_subprogs:FAIL Summary: 0/0 PASSED, 0 SKIPPED, 1 FAILED The maximum stack size exceeded 512 bytes and caused verification failure. The following llvm patch caused the above regression: https://github.com/llvm/llvm-project/pull/68882 I will do some analysis and try to find a solution to resolve this failure. Thanks, Yonghong
