Change Details

During driver reload stress test, after 50-300 reloads occurs panic. Adding sleeps after load/unload driver issue does not occur. Too fast load/unload may cause that gt_taskqueue pointer is freed earlier. Checking null pointer for this fixes it. Script used to test it: i=1 while true do echo "Attempt number $i" echo "Loading if_ice" kldload if_ice echo "Unloading if_ice" kldunload if_ice i=$(expr $i + 1) echo "Last good try: $i" > ice_load_unload_lastGoodTry.txt done

During driver reload stress test, after 50-300 reloads occurs panic. Adding sleeps after load/unload driver issue does not occur. Too fast load/unload may cause that gt_taskqueue pointer is freed earlier. Checking null pointer for this fixes it. Script used to test it: ``` i=1 while true do echo "Attempt number $i" echo "Loading if_ice" kldload if_ice echo "Unloading if_ice" kldunload if_ice i=$(expr $i + 1) echo "Last good try: $i" > ice_load_unload_lastGoodTry.txt done ```

During driver reload stress test, after 50-300 reloads occurs panic. Adding sleeps after load/unload driver issue does not occur. Too fast load/unload may cause that gt_taskqueue pointer is freed earlier. Checking null pointer for this fixes it. Script used to test it: ``` i=1 while true do echo "Attempt number $i" echo "Loading if_ice" kldload if_ice echo "Unloading if_ice" kldunload if_ice i=$(expr $i + 1) echo "Last good try: $i" > ice_load_unload_lastGoodTry.txt done ```