diff options
| -rw-r--r-- | net/ceph/messenger.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c index ad5b708..d11f91b 100644 --- a/net/ceph/messenger.c +++ b/net/ceph/messenger.c @@ -143,16 +143,22 @@ static void ceph_write_space(struct sock *sk) struct ceph_connection *con = (struct ceph_connection *)sk->sk_user_data; - /* only queue to workqueue if there is data we want to write. */ + /* only queue to workqueue if there is data we want to write, + * and there is sufficient space in the socket buffer to accept + * more data. clear SOCK_NOSPACE so that ceph_write_space() + * doesn't get called again until try_write() fills the socket + * buffer. See net/ipv4/tcp_input.c:tcp_check_space() + * and net/core/stream.c:sk_stream_write_space(). + */ if (test_bit(WRITE_PENDING, &con->state)) { - dout("ceph_write_space %p queueing write work\n", con); - queue_con(con); + if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk)) { + dout("ceph_write_space %p queueing write work\n", con); + clear_bit(SOCK_NOSPACE, &sk->sk_socket->flags); + queue_con(con); + } } else { dout("ceph_write_space %p nothing to write\n", con); } - - /* since we have our own write_space, clear the SOCK_NOSPACE flag */ - clear_bit(SOCK_NOSPACE, &sk->sk_socket->flags); } /* socket's state has changed */ |
