On Mon, Dec 03, 2012 at 06:30:49PM +0800, Jason Wang wrote: > On 12/03/2012 06:14 PM, Michael S. Tsirkin wrote: > > On Tue, Nov 27, 2012 at 06:15:59PM +0800, Jason Wang wrote: > >> > - if (!try_fill_recv(&vi->rq, GFP_KERNEL)) > >> > - schedule_delayed_work(&vi->rq.refill, 0); > >> > + for (i = 0; i < vi->max_queue_pairs; i++) > >> > + if (!try_fill_recv(&vi->rq[i], GFP_KERNEL)) > >> > + schedule_delayed_work(&vi->rq[i].refill, 0); > >> > > >> > mutex_lock(&vi->config_lock); > >> > vi->config_enable = true; > >> > mutex_unlock(&vi->config_lock); > >> > > >> > + BUG_ON(virtnet_set_queues(vi)); > >> > + > >> > return 0; > >> > } > >> > #endif > > Also crashing on device nack of command is also not nice. > > In this case it seems we can just switch to > > single-queue mode which should always be safe. > > Not sure it's safe. It depends on the reason why this call fails. If we > left a state that the driver only use single queue but the device use > multi queues, we may still lost the network.
Looks like we won't: napi will stay enabled on all queues so we will process incoming packets. -- MST -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
