From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael S. Tsirkin" Subject: [PATCH 15/18] virtio_net: delay TX callbacks Date: Wed, 4 May 2011 23:52:42 +0300 Message-ID: <48ddc1561adc0ce8f26e26ecb326a5c504a74e7e.1304541919.git.mst__168.070049449121$1304542432$gmane$org@redhat.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.linux-foundation.org Errors-To: virtualization-bounces@lists.linux-foundation.org Cc: Krishna Kumar , Carsten Otte , lguest@lists.ozlabs.org, Shirley Ma , kvm@vger.kernel.org, linux-s390@vger.kernel.org, netdev@vger.kernel.org, habanero@linux.vnet.ibm.com, Heiko Carstens , linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, steved@us.ibm.com, Christian Borntraeger , Tom Lendacky , Martin Schwidefsky , linux390@de.ibm.com List-Id: virtualization@lists.linuxfoundation.org Ask for delayed callbacks on TX ring full, to give the other side more of a chance to make progress. Signed-off-by: Michael S. Tsirkin --- drivers/net/virtio_net.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 0cb0b06..f685324 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -609,7 +609,7 @@ static netdev_tx_t start_xmit(struct sk_buff *skb, struct net_device *dev) * before it gets out of hand. Naturally, this wastes entries. */ if (capacity < 2+MAX_SKB_FRAGS) { netif_stop_queue(dev); - if (unlikely(!virtqueue_enable_cb(vi->svq))) { + if (unlikely(!virtqueue_enable_cb_delayed(vi->svq))) { /* More just got used, free them then recheck. */ capacity += free_old_xmit_skbs(vi); if (capacity >= 2+MAX_SKB_FRAGS) { -- 1.7.5.53.gc233e