Re: perf test LLVM failure

[Arnaldo Carvalho de Melo <acme@kernel.org>]

Em Tue, Jun 13, 2017 at 10:40:37AM +0200, Thomas-Mich Richter escreveu:
> I have Fedora 25 with an 4.11 kernel and get this error
> 
> [root@s8360047 perf]# ./perf test   LLVM
> 35: LLVM search and compile                    :
> 35.1: Basic BPF llvm compile                    : Ok
> 35.2: kbuild searching                          : Ok
> 35.3: Compile source for BPF prologue generation: FAILED!
> 35.4: Compile source for BPF relocation         : Skip
> [root@s8360047 perf]#
> 
> The error message is
> libbpf: Program 'func=null_lseek file->f_mode offset orig'
> contains non-map related relo data pointing to section 5

Wang, can you please take a look at this?

- Arnaldo
 
> I have installed
> clang-3.8.1-1.fc25.s390x
> clang-libs-3.8.1-1.fc25.s390x
> libpfm-4.8.0-2.ibm.fc25.s390x
> compiler-rt-3.9.1-1.fc25.s390x
> llvm-libs-3.8.1-2.fc25.s390x
> 
> and when I compile the test/bpf-script-test-prologue.c manually
> the compile does not show any error message.
> 
> The error comes from file ../lib/bpf/libbpf.c
> function bpf_program__collect_reloc()
> 
> Any ideas what cauese this and how to fix it?
> 
> By the way Fedora 24 with the same kernel version as above runs fine.
> 
> -- 
> Thomas Richter, Dept 3303, IBM LTC Boeblingen Germany
> --
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