Constant ARENA_VMO_NAME 

pub const ARENA_VMO_NAME: &[u8] = b"counters/arena";

PA_VMO_KERNEL_FILE with this name holds an array of SMP_MAX_CPUS arrays, each of which is i64[num_counters()] indexed by the index into DescriptorVmo’s descriptor table (counters::kArenaVmoName).