diff --git a/sys/contrib/openzfs/module/zfs/arc.c b/sys/contrib/openzfs/module/zfs/arc.c
--- a/sys/contrib/openzfs/module/zfs/arc.c
+++ b/sys/contrib/openzfs/module/zfs/arc.c
@@ -9062,6 +9062,7 @@
 	l2arc_write_callback_t	*cb = NULL;
 	zio_t 			*pio, *wzio;
 	uint64_t 		guid = spa_load_guid(spa);
+	l2arc_dev_hdr_phys_t	*l2dhdr = dev->l2ad_dev_hdr;
 
 	ASSERT3P(dev->l2ad_vdev, !=, NULL);
 
@@ -9293,7 +9294,8 @@
 		 * Although we did not write any buffers l2ad_evict may
 		 * have advanced.
 		 */
-		l2arc_dev_hdr_update(dev);
+		if (dev->l2ad_evict != l2dhdr->dh_evict)
+			l2arc_dev_hdr_update(dev);
 
 		return (0);
 	}