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| author |   Yonghong Song <yhs@fb.com> | 2019-05-16 10:17:31 -0700 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2019-05-16 11:44:50 -0700 |
| commit | ac4e0e055fee5751c78bba1fc9ce508a6874d916 (patch) | |
| tree | 5e1d1a8e3bc75cb07992a924142f457fea9aa861 /tools/testing | |
| parent | selftests/bpf: add test_sysctl and map_tests/tests.h to .gitignore (diff) | |
| download | linux-dev-ac4e0e055fee5751c78bba1fc9ce508a6874d916.tar.xz linux-dev-ac4e0e055fee5751c78bba1fc9ce508a6874d916.zip | |
tools/bpftool: move set_max_rlimit() before __bpf_object__open_xattr()
For a host which has a lower rlimit for max locked memory (e.g., 64KB),
the following error occurs in one of our production systems:
# /usr/sbin/bpftool prog load /paragon/pods/52877437/home/mark.o \
/sys/fs/bpf/paragon_mark_21 type cgroup/skb \
map idx 0 pinned /sys/fs/bpf/paragon_map_21
libbpf: Error in bpf_object__probe_name():Operation not permitted(1).
Couldn't load basic 'r0 = 0' BPF program.
Error: failed to open object file
The reason is due to low locked memory during bpf_object__probe_name()
which probes whether program name is supported in kernel or not
during __bpf_object__open_xattr().
bpftool program load already tries to relax mlock rlimit before
bpf_object__load(). Let us move set_max_rlimit() before
__bpf_object__open_xattr(), which fixed the issue here.
Fixes: 47eff61777c7 ("bpf, libbpf: introduce bpf_object__probe_caps to test BPF capabilities")
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/testing')
0 files changed, 0 insertions, 0 deletions