• Alexei Starovoitov's avatar
    bpf: charge user for creation of BPF maps and programs · aaac3ba9
    Alexei Starovoitov authored
    since eBPF programs and maps use kernel memory consider it 'locked' memory
    from user accounting point of view and charge it against RLIMIT_MEMLOCK limit.
    This limit is typically set to 64Kbytes by distros, so almost all
    bpf+tracing programs would need to increase it, since they use maps,
    but kernel charges maximum map size upfront.
    For example the hash map of 1024 elements will be charged as 64Kbyte.
    It's inconvenient for current users and changes current behavior for root,
    but probably worth doing to be consistent root vs non-root.
    
    Similar accounting logic is done by mmap of perf_event.
    Signed-off-by: default avatarAlexei Starovoitov <ast@plumgrid.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    aaac3ba9
bpf.h 6.5 KB