From: Steven Galgano <sgalg...@adjacentlink.com> Date: Sun, 13 Apr 2014 21:30:27 -0400
> Added optional per queue flow control support using IFF_FLOW_CONTROL. When > the IFF_FLOW_CONTROL TUNSETIFF flag is specified it will set a per queue flag > to indicate that the queue should be stopped using netif_tx_stop_queue(), > rather than discarding frames once full. After reading a frame from the > respective stopped queue, a netif_tx_wake_queue() is issued to signal > resource availability. > > The per queue TUN_FLOW_CONTROL flag is stored in struct tun_file. This > provides the flexibility to enable flow control on all, none or some queues > when using IFF_MULTI_QUEUE. When not using IFF_MULTI_QUEUE, IFF_FLOW_CONTROL > will apply to the single queue. No changes were made to the default drop > frame policy. > > This change adds support for back pressure use cases. > > Reported-by: Brian Adamson <brian.adam...@nrl.navy.mil> > Tested-by: Joseph Giovatto <jgiova...@djacentlink.com> > Signed-off-by: Steven Galgano <sgalg...@adjacentlink.com> Please format your commit messages to ~80 columns of text. It won't be automatically formatted by GIT and in fact it looks ugly with all the wrapping in text based tools. -- 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/
