From 1622d92410f46a9238d1b639e127cbb5043e8a9b Mon Sep 17 00:00:00 2001 From: Ian Campbell Date: Fri, 10 Nov 2006 12:34:28 +0000 Subject: [PATCH] PV-on-HVM: TSO support prior to 2.6.9 appears to be unreliable, especially when firewalling is enabled. Signed-off-by: Ian Campbell --- linux-2.6-xen-sparse/drivers/xen/netfront/netfront.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/linux-2.6-xen-sparse/drivers/xen/netfront/netfront.c b/linux-2.6-xen-sparse/drivers/xen/netfront/netfront.c index e379f5f314..da22d45bf6 100644 --- a/linux-2.6-xen-sparse/drivers/xen/netfront/netfront.c +++ b/linux-2.6-xen-sparse/drivers/xen/netfront/netfront.c @@ -1623,8 +1623,16 @@ static void xennet_set_features(struct net_device *dev) if (!(dev->features & NETIF_F_IP_CSUM)) return; - if (!xennet_set_sg(dev, 1)) - xennet_set_tso(dev, 1); + if (xennet_set_sg(dev, 1)) + return; + + /* Before 2.6.9 TSO seems to be unreliable so do not enable it + * on older kernels. + */ +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,9) + xennet_set_tso(dev, 1); +#endif + } static int network_connect(struct net_device *dev) -- 2.30.2