Added tcp_kick(). This speed up LILO and GRUB booting by almost two

orders of magnitude.

src/include/gpxe/tcp.h

@@ -93,6 +93,7 @@ extern size_t tcp_buflen;
 extern void tcp_connect ( struct tcp_connection *conn );
 extern void tcp_send ( struct tcp_connection *conn, const void *data,
 		       size_t len );
+extern void tcp_kick ( struct tcp_connection *conn );
 extern void tcp_close ( struct tcp_connection *conn );
 
 #endif /* _GPXE_TCP_H */

src/net/tcp.c

@@ -183,6 +183,19 @@ static void tcp_periodic ( void ) {
 	}
 }
 
+/**
+ * Kick a connection into life
+ *
+ * @v conn	TCP connection
+ *
+ * Call this function when you have new data to send and are not
+ * already being called as part of TCP processing.
+ */
+void tcp_kick ( struct tcp_connection *conn __unused ) {
+	/* Just kick all the connections; this will work for now */
+	tcp_periodic();
+}
+
 /**
  * Single-step the TCP stack
  *

src/net/tcp/iscsi.c

@@ -768,6 +768,7 @@ int iscsi_issue ( struct iscsi_session *iscsi,
 
 	if ( iscsi->status & ISCSI_STATUS_CONNECTED ) {
 		iscsi_start_command ( iscsi );
+		tcp_kick ( &iscsi->tcp );
 	} else {
 		iscsi->tcp.tcp_op = &iscsi_tcp_operations;
 		tcp_connect ( &iscsi->tcp );