Messages in this thread | | | Date | Wed, 29 Nov 2017 13:07:34 -0800 | From | Martin KaFai Lau <> | Subject | Re: 'perf test BPF' failing, libbpf regression wrt "basic API for BPF obj name" |
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On Tue, Nov 28, 2017 at 04:05:19PM -0300, Arnaldo Carvalho de Melo wrote: > > [root@jouet ~]# perf test -v bpf > 39: BPF filter : > 39.1: Basic BPF filtering : > --- start --- > test child forked, pid 12198 > Kernel build dir is set to /lib/modules/4.14.0+/build > set env: KBUILD_DIR=/lib/modules/4.14.0+/build [ ... ] > libbpf: failed to create map (name: 'flip_table'): Invalid argument > libbpf: failed to load object '[basic_bpf_test]' > bpf: load objects failed 88cda1c9da02 ("bpf: libbpf: Provide basic API support to specify BPF obj name") is introduced in 4.15.
I think the perf@kernel-4.15 broke on older kernels like 4.14 because the new bpf prog/map name is only introduced since 4.15.
The newer perf needs to be compatible with an older kernel?
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