Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 4.4 01/27] netvsc: reduce maximum GSO size | Date | Fri, 13 Jan 2017 12:38:18 +0100 |
| |
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: stephen hemminger <stephen@networkplumber.org>
[ Upstream commit a50af86dd49ee1851d1ccf06dd0019c05b95e297 ]
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: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/net/hyperv/netvsc_drv.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -40,6 +40,8 @@ #include "hyperv_net.h" +/* Restrict GSO size to account for NVGRE */ +#define NETVSC_GSO_MAX_SIZE 62768 #define RING_SIZE_MIN 64 static int ring_size = 128; @@ -852,6 +854,7 @@ static int netvsc_set_channels(struct ne } goto recover; } + netif_set_gso_max_size(net, NETVSC_GSO_MAX_SIZE); out: netvsc_open(net);
| |