AsyncConnection: don't limit recv_max_prefetch with TCP_PREFETCH_MIN_…

…SIZE

simple messenger's prefetch buffer is ms_tcp_prefetch_max_size.
Don't cap it with TCP_PREFETCH_MIN_SIZE in the async messenger.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

src/msg/async/AsyncConnection.cc

@@ -180,7 +180,7 @@ AsyncConnection::AsyncConnection(CephContext *cct, AsyncMessenger *m, EventCente
     peer_global_seq(0), out_seq(0), ack_left(0), in_seq(0), state(STATE_NONE), state_after_send(0), sd(-1),
     port(-1), write_lock("AsyncConnection::write_lock"), can_write(WriteStatus::NOWRITE),
     open_write(false), keepalive(false), lock("AsyncConnection::lock"), recv_buf(NULL),
-    recv_max_prefetch(MIN(msgr->cct->_conf->ms_tcp_prefetch_max_size, TCP_PREFETCH_MIN_SIZE)),
+    recv_max_prefetch(MAX(msgr->cct->_conf->ms_tcp_prefetch_max_size, TCP_PREFETCH_MIN_SIZE)),
     recv_start(0), recv_end(0), got_bad_auth(false), authorizer(NULL), replacing(false),
     is_reset_from_peer(false), once_ready(false), state_buffer(NULL), state_offset(0), net(cct), center(c)
 {