similar to: Virtio-net, ethtool and rx-checksumming

If the VIRTIO_NET_F_GUEST_CSUM virtio feature is available, the guest does not have to calculate the checksums on all received packets. This is pretty much the same feature as RX checksum offloading on real network cards, so the virtio-net driver should report this by setting the NETIF_F_RXCSUM flag. When the user now runs "ethtool -k", he or she can see whether the virtio-net interface

If the VIRTIO_NET_F_GUEST_CSUM virtio feature is available, the guest does not have to calculate the checksums on all received packets. This is pretty much the same feature as RX checksum offloading on real network cards, so the virtio-net driver should report this by setting the NETIF_F_RXCSUM flag. When the user now runs "ethtool -k", he or she can see whether the virtio-net interface

From: Thomas Huth <thuth at linux.vnet.ibm.com> Date: Tue, 27 Aug 2013 17:09:02 +0200 > If the VIRTIO_NET_F_GUEST_CSUM virtio feature is available, the guest > does not have to calculate the checksums on all received packets. This > is pretty much the same feature as RX checksum offloading on real > network cards, so the virtio-net driver should report this by setting > the

On Jul 28, 2011, at 1:38 PM, Rose, Gregory V wrote: > >> From: Anirban Chakraborty [mailto:anirban.chakraborty at qlogic.com] >> Sent: Thursday, July 28, 2011 12:04 PM >> To: Rose, Gregory V >> Cc: David Miller; netdev; Ben Hutchings; Kirsher, Jeffrey T >> Subject: Re: [RFC net-next PATCH 3/4] ethtool: Add new set commands >> >> >> On Jul 28,

On Jul 28, 2011, at 1:38 PM, Rose, Gregory V wrote: > >> From: Anirban Chakraborty [mailto:anirban.chakraborty at qlogic.com] >> Sent: Thursday, July 28, 2011 12:04 PM >> To: Rose, Gregory V >> Cc: David Miller; netdev; Ben Hutchings; Kirsher, Jeffrey T >> Subject: Re: [RFC net-next PATCH 3/4] ethtool: Add new set commands >> >> >> On Jul 28,

On Mon, Sep 28, 2020 at 5:42 AM <xiangxia.m.yue at gmail.com> wrote: > > From: Tonghao Zhang <xiangxia.m.yue at gmail.com> > > Allow user configuring RXCSUM separately with ethtool -K, > reusing the existing virtnet_set_guest_offloads helper > that configures RXCSUM for XDP. This is conditional on > VIRTIO_NET_F_CTRL_GUEST_OFFLOADS. > > Cc: Michael S. Tsirkin

On 2017?07?19? 04:07, Michael S. Tsirkin wrote: > On Mon, Jul 17, 2017 at 08:44:01PM +0800, Jason Wang wrote: >> Current XDP implementation want guest offloads feature to be disabled > s/want/wants/ > >> on qemu cli. > on the device. > >> This is inconvenient and means guest can't benefit from >> offloads if XDP is not used. This patch tries to address

Hello, My first post on Xen-Users, so .. i''ve discovered a strange problem. Setup: -A Windows server 2003R2 (x86) with GPL PV driver 0.9.9 ipferf 1.7.0 (from 2003) -dom0 a opensuse 11.0 xen: # rpm -q -a |grep -i xen kqemu-kmp-xen-1.3.0pre11_2.6.25.5_1.1-7.1 kiwi-desc-xenboot-2.38-67.1 xen-3.2.1_16881_04-4.2 xen-tools-3.2.1_16881_04-4.2 xen-libs-3.2.1_16881_04-4.2

On Mon, Jul 17, 2017 at 08:44:01PM +0800, Jason Wang wrote: > Current XDP implementation want guest offloads feature to be disabled s/want/wants/ > on qemu cli. on the device. > This is inconvenient and means guest can't benefit from > offloads if XDP is not used. This patch tries to address this > limitation by disable disabling > the offloads on demand through control

On Mon, Jul 17, 2017 at 08:44:01PM +0800, Jason Wang wrote: > Current XDP implementation want guest offloads feature to be disabled s/want/wants/ > on qemu cli. on the device. > This is inconvenient and means guest can't benefit from > offloads if XDP is not used. This patch tries to address this > limitation by disable disabling > the offloads on demand through control

On Sunday, January 26, 2020 3:58:31 PM CET Pete Biggs wrote: > > what does Centos 7 do with UPD packets having invalid checksums? > > By default I assume they are just dropped - that's what should happen. Hm that's what thought. > > Are such packets inevitably dropped? > > Applications can specifically disable checksum checking for the kernel > network stack

In my Linux VM, I am unable to change scatter-gather / tx-checksumming / TCP-segmentation offload features by ethtool command. I am using virtio nic with vhostuser port backend. It shows me an error: Cannot change tx-checksumming Cannot change scatter-gather Cannot change tcp-segmentation offload Could not change any device features Ony running command ethtool -k ens3, I get the following:

On Tue, Sep 29, 2020 at 1:55 PM Michael S. Tsirkin <mst at redhat.com> wrote: > > On Tue, Sep 29, 2020 at 09:45:24AM +0800, Tonghao Zhang wrote: > > On Tue, Sep 29, 2020 at 3:25 AM Michael S. Tsirkin <mst at redhat.com> wrote: > > > > > > On Mon, Sep 28, 2020 at 11:39:15AM +0800, xiangxia.m.yue at gmail.com wrote: > > > > From: Tonghao Zhang

On 5/3/19 10:19 AM, Harsh Gondaliya wrote: > In my Linux VM, I am unable to change scatter-gather / tx-checksumming / > TCP-segmentation offload features by ethtool command. I am using virtio nic > with vhostuser port backend. > It shows me an error: > Cannot change tx-checksumming > Cannot change scatter-gather > Cannot change tcp-segmentation offload > Could not change

On Tue, Sep 29, 2020 at 2:22 PM Michael S. Tsirkin <mst at redhat.com> wrote: > > On Tue, Sep 29, 2020 at 02:10:56PM +0800, Tonghao Zhang wrote: > > On Tue, Sep 29, 2020 at 1:55 PM Michael S. Tsirkin <mst at redhat.com> wrote: > > > > > > On Tue, Sep 29, 2020 at 09:45:24AM +0800, Tonghao Zhang wrote: > > > > On Tue, Sep 29, 2020 at 3:25 AM

I have just seen this, that I thought was an old problem, show up again.. I noticed it when I let a domU stay on DHCP long enough to try to do a renew, then the DHCP server started logging about checksum errors: dhcpd: 5 bad udp checksums in 5 packets DHCP server is 1:9.6.ESV.R4+dfsg-0+lenny1 so newer DHCP releases may contain workaorunds allowing these packets.. Since I had this problem years

From: Tonghao Zhang <xiangxia.m.yue at gmail.com> Allow user configuring RXCSUM separately with ethtool -K, reusing the existing virtnet_set_guest_offloads helper that configures RXCSUM for XDP. This is conditional on VIRTIO_NET_F_CTRL_GUEST_OFFLOADS. Cc: Michael S. Tsirkin <mst at redhat.com> Cc: Jason Wang <jasowang at redhat.com> Signed-off-by: Tonghao Zhang

On Tue, Sep 29, 2020 at 3:25 AM Michael S. Tsirkin <mst at redhat.com> wrote: > > On Mon, Sep 28, 2020 at 11:39:15AM +0800, xiangxia.m.yue at gmail.com wrote: > > From: Tonghao Zhang <xiangxia.m.yue at gmail.com> > > > > Allow user configuring RXCSUM separately with ethtool -K, > > reusing the existing virtnet_set_guest_offloads helper > > that

On Tue, Sep 29, 2020 at 02:10:56PM +0800, Tonghao Zhang wrote: > On Tue, Sep 29, 2020 at 1:55 PM Michael S. Tsirkin <mst at redhat.com> wrote: > > > > On Tue, Sep 29, 2020 at 09:45:24AM +0800, Tonghao Zhang wrote: > > > On Tue, Sep 29, 2020 at 3:25 AM Michael S. Tsirkin <mst at redhat.com> wrote: > > > > > > > > On Mon, Sep 28, 2020 at

On Tue, Sep 29, 2020 at 02:10:56PM +0800, Tonghao Zhang wrote: > On Tue, Sep 29, 2020 at 1:55 PM Michael S. Tsirkin <mst at redhat.com> wrote: > > > > On Tue, Sep 29, 2020 at 09:45:24AM +0800, Tonghao Zhang wrote: > > > On Tue, Sep 29, 2020 at 3:25 AM Michael S. Tsirkin <mst at redhat.com> wrote: > > > > > > > > On Mon, Sep 28, 2020 at