]> git.itanic.dy.fi Git - linux-stable/commit
perf test shell record_bpf_filter: Skip 6.2 kernel
authorNamhyung Kim <namhyung@kernel.org>
Fri, 25 Aug 2023 16:41:50 +0000 (09:41 -0700)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Tue, 29 Aug 2023 17:16:14 +0000 (14:16 -0300)
commit11f5710d96afcd569a7c8e00395b714bbea3ce5d
tree72d92644afffaaea0d727585e23b1c3c033c41df
parentc091c78b73c82f1e2811ab19b8e287ddc7807651
perf test shell record_bpf_filter: Skip 6.2 kernel

The BPF sample filtering requires two kernel changes below:

 * bpf_cast_to_kernel_ctx() kfunc (added in v6.2)

 * setting perf_sample_data->sample_flags (finished in v6.3)

The perf tools can check bpf_cast_to_kernel_ctx() easily so it can
refuse BPF filters on those old kernels (v6.1 and earlier).

But checking sample_flags appears to be difficult so current code won't
work on v6.2 kernel.  That's unfortunate but I don't know what's the
correct way to handle it.

For now, let's skip v6.2 kernels explicitly (if failed) in the test.

Fixes: 9575ecdd198a50e9 ("perf test: Add perf record sample filtering test")
Reported-by: Arnaldo Carvalho de Melo <acme@kernel.org>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: bpf@vger.kernel.org
Link: https://lore.kernel.org/r/20230825164152.165610-1-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools/perf/tests/shell/record_bpf_filter.sh