On Mon, 20 Nov 2023 20:37:34 +0800, Heng Qi wrote: <...> > @@ -2179,6 +2220,7 @@ static void virtnet_disable_queue_pair(struct > virtnet_info *vi, int qp_index) > virtnet_napi_tx_disable(&vi->sq[qp_index].napi); > napi_disable(&vi->rq[qp_index].napi); > xdp_rxq_info_unreg(&vi->rq[qp_index].xdp_rxq); > + cancel_work_sync(&vi->rq[qp_index].dim.work);
I'm not sure, but please check if here may cause deadlock: rtnl_lock held -> .ndo_stop -> virtnet_disable_queue_pair() -> cancel_work_sync() -> virtnet_rx_dim_work() -> rtnl_lock() > } > > static int virtnet_enable_queue_pair(struct virtnet_info *vi, int qp_index) <...>
