On Thu, Feb 09, 2017 at 07:37:35PM +0000, Ben Hutchings wrote: > On Fri, 2017-01-13 at 12:38 +0100, Greg Kroah-Hartman wrote: > > 4.4-stable review patch. If anyone has any objections, please let me know. > > > > ------------------ > > > > From: stephen hemminger <stephen@xxxxxxxxxxxxxxxxxx> > > > > > > [ 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@xxxxxxxxxxxxx> > > Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> > > Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> > > --- > > 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); > > > > This has been wrongly backported. Please apply the patch below. > > Ben. Many thanks for this, now applied. greg k-h -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html