rds_sk_rcvbuf
sinfo.rcvbuf = rds_sk_rcvbuf(rs);
sinfo6.rcvbuf = rds_sk_rcvbuf(rs);
now_congested = rs->rs_rcv_bytes > rds_sk_rcvbuf(rs);
rds_sk_rcvbuf(rs), now_congested, delta);
else if (rs->rs_congested && (rs->rs_rcv_bytes < (rds_sk_rcvbuf(rs)/2))) {