If you see your laner burn flash alt-ping it for the jungler to see. If they continue to play aggressively it's generally a free kill at that point.
If they are holding their flash and you are being pressured don't get too discouraged, especially if you are losing out on farm. As long as you aren't giving kills to your enemy you aren't doing any harm to your team. Most junglers will gank once they see you pushed into your tower, otherwise they risk being counter-ganked. Being counter ganked in a losing lane is very risky because you are more than likely to lose the trade/give away kills and this puts you and your team even further behind. Simply put, it is unwise to gank a losing lane unless you have a read on the enemy junglers relative location or other enemy tp cooldowns.
Your jungler may opt to gank other winning lanes in an attempt to gain a lead for other members of your team. There is a higher chance of success if ganking a lane with a lead. If you survive the laning phase you have done more than enough. YOU ARE NOT THE LESS SKILLED PLAYER IF YOU DON'T WIN YOUR LANE.
(junglers may be desperate enough to gank a losing lane if it is unwise to let that lane win) eg letting vayne win lane without ganks can cost you the lategame.
Ganking for the sake of dealing damage and relieving pressure is only something I would recommend if the jungler has no better options, otherwise its a waste of time. Sometimes having your jungler farm is better for your team then them ganking because they trade gold and xp from neutral camps.
I hope this helps some get a better grasp of a junglers thought process when they get spam pinged from a losing lane.