From dbdd485a3acfe45898a92ae6f29f9e731bdda3d6 Mon Sep 17 00:00:00 2001
From: Martin Holst Swende <martin@swende.se>
Date: Wed, 19 Jun 2019 10:34:00 +0200
Subject: [PATCH] miner: avoid transaction processing when pending block is
 already full

---
 miner/worker.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/miner/worker.go b/miner/worker.go
index c4b5cbc625..4a9528c395 100644
--- a/miner/worker.go
+++ b/miner/worker.go
@@ -453,6 +453,10 @@ func (w *worker) mainLoop() {
 			// already included in the current mining block. These transactions will
 			// be automatically eliminated.
 			if !w.isRunning() && w.current != nil {
+				// If block is already full, abort
+				if gp := w.current.gasPool; gp != nil && gp.Gas() < params.TxGas {
+					continue
+				}
 				w.mu.RLock()
 				coinbase := w.coinbase
 				w.mu.RUnlock()