diff options
| author | stephen hemminger <stephen@networkplumber.org> | 2016-12-06 13:43:54 -0800 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-07-04 11:51:18 +0200 |
| commit | 5cec7c1f5f4ec221037316870eb9577f44ef626e (patch) | |
| tree | e63fcafcc26d44e8077eab9b0fd8efabf6c854a6 /drivers/net | |
| parent | 46df381f2a9daedbef14f2d06f921adbd2ae545d (diff) | |
netvsc: reduce maximum GSO size
commit a50af86dd49ee1851d1ccf06dd0019c05b95e297 upstream.
Hyper-V (and Azure) support using NVGRE which requires some extra space
for encapsulation headers. Because of this the largest allowed TSO
packet is reduced.
For older releases, hard code a fixed reduced value. For next release,
there is a better solution which uses result of host offload
negotiation.
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/hyperv/netvsc_drv.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c index 59e9c56e5..493460424 100644 --- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -48,6 +48,9 @@ struct net_device_context { struct work_struct work; }; +/* Restrict GSO size to account for NVGRE */ +#define NETVSC_GSO_MAX_SIZE 62768 + #define RING_SIZE_MIN 64 static int ring_size = 128; module_param(ring_size, int, S_IRUGO); @@ -436,6 +439,7 @@ static int netvsc_probe(struct hv_device *dev, SET_ETHTOOL_OPS(net, ðtool_ops); SET_NETDEV_DEV(net, &dev->device); + netif_set_gso_max_size(net, NETVSC_GSO_MAX_SIZE); ret = register_netdev(net); if (ret != 0) { |