On Thu, May 16, 2019 at 11:31 AM Yonghong Song <yhs@xxxxxx> wrote:
>
> 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@xxxxxx>
Applied. Thanks
