selftests/bpf: Restore original comm in test_overhead
authorStanislav Fomichev <sdf@google.com>
Wed, 8 Jan 2020 19:21:32 +0000 (11:21 -0800)
committerAlexei Starovoitov <ast@kernel.org>
Thu, 9 Jan 2020 16:42:07 +0000 (08:42 -0800)
commite43002242a47e8d7b2f9446f54de982f09e7dbd1
treef60e38d0eed3125391cb1677beab3e3b85ba7e93
parent2faef64aa6b3c94c940c3a62ed22f3af4980223a
selftests/bpf: Restore original comm in test_overhead

test_overhead changes task comm in order to estimate BPF trampoline
overhead but never sets the comm back to the original one.
We have the tests (like core_reloc.c) that have 'test_progs'
as hard-coded expected comm, so let's try to preserve the
original comm.

Currently, everything works because the order of execution is:
first core_recloc, then test_overhead; but let's make it a bit
future-proof.

Other related changes: use 'test_overhead' as new comm instead of
'test' to make it easy to debug and drop '\n' at the end.

Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Petar Penkov <ppenkov@google.com>
Acked-by: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20200108192132.189221-1-sdf@google.com
tools/testing/selftests/bpf/prog_tests/test_overhead.c