| Message ID | 1583175981-41409-1-git-send-email-u9012063@gmail.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [ovs-dev] doc: Add AF_PACKET limitation on userspace tso. | expand |
Hi William, I've posted this one instead few days ago: https://mail.openvswitch.org/pipermail/ovs-dev/2020-February/368255.html Please have a look. Thanks, fbl On Mon, Mar 02, 2020 at 11:06:21AM -0800, William Tu wrote: > For enabling TSO on devices using AF_PACKET, minimum supported > kernel version is 4.19 due to a virtio GSO fix > 9d2f67e43b73 ("net/packet: fix packet drop as of virtio gso") > > Reported-by: Yi Yang <yangyi01@inspur.com> > Reported-at: https://mail.openvswitch.org/pipermail/ovs-dev/2020-March/368281.html > Signed-off-by: William Tu <u9012063@gmail.com> > --- > Documentation/topics/userspace-tso.rst | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/Documentation/topics/userspace-tso.rst b/Documentation/topics/userspace-tso.rst > index 0fbac93a54d7..4c2de50075d5 100644 > --- a/Documentation/topics/userspace-tso.rst > +++ b/Documentation/topics/userspace-tso.rst > @@ -98,6 +98,10 @@ in Open vSwitch. Currently, if the NIC supports that, then the feature is > enabled, otherwise TSO can still be enabled but SCTP packets sent to the NIC > will be dropped. > > +For enabling TSO on devices using AF_PACKET, minimum supported kernel version > +is 4.19. This is due to a virtio GSO fix: > +9d2f67e43b73 ("net/packet: fix packet drop as of virtio gso") > + > There is no software implementation of TSO, so all ports attached to the > datapath must support TSO or packets using that feature will be dropped > on ports without TSO support. That also means guests using vhost-user > -- > 2.7.4 >
diff --git a/Documentation/topics/userspace-tso.rst b/Documentation/topics/userspace-tso.rst index 0fbac93a54d7..4c2de50075d5 100644 --- a/Documentation/topics/userspace-tso.rst +++ b/Documentation/topics/userspace-tso.rst @@ -98,6 +98,10 @@ in Open vSwitch. Currently, if the NIC supports that, then the feature is enabled, otherwise TSO can still be enabled but SCTP packets sent to the NIC will be dropped. +For enabling TSO on devices using AF_PACKET, minimum supported kernel version +is 4.19. This is due to a virtio GSO fix: +9d2f67e43b73 ("net/packet: fix packet drop as of virtio gso") + There is no software implementation of TSO, so all ports attached to the datapath must support TSO or packets using that feature will be dropped on ports without TSO support. That also means guests using vhost-user
For enabling TSO on devices using AF_PACKET, minimum supported kernel version is 4.19 due to a virtio GSO fix 9d2f67e43b73 ("net/packet: fix packet drop as of virtio gso") Reported-by: Yi Yang <yangyi01@inspur.com> Reported-at: https://mail.openvswitch.org/pipermail/ovs-dev/2020-March/368281.html Signed-off-by: William Tu <u9012063@gmail.com> --- Documentation/topics/userspace-tso.rst | 4 ++++ 1 file changed, 4 insertions(+)