[ovs-dev] [PATCH v2] userspace-tso: Document the minimum kernel version.

Ilya Maximets i.maximets at ovn.org
Wed Sep 16 13:52:04 UTC 2020


On 3/10/20 3:39 PM, Flavio Leitner wrote:
> The kernel needs to be at least 4.19-rc7 to include the commit
> 9d2f67e43b73 ("net/packet: fix packet drop as of virtio gso")
> otherwise the TSO packets are dropped when using raw sockets.
> 
> Fixes: 29cf9c1b3b9c ("userspace: Add TCP Segmentation Offload support")
> Reported-by: Yi Yang (杨燚)-云服务集团 <yangyi01 at inspur.com>
> Signed-off-by: Flavio Leitner <fbl at sysclose.org>
> ---
>  Documentation/topics/userspace-tso.rst | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> v2
>   - Change wording to be more clear with regards to kernel
>     versions and possible backports.
> 

Thanks!

Applied to master and backported down to 2.13.

Best regards, Ilya Maximets.

> diff --git a/Documentation/topics/userspace-tso.rst b/Documentation/topics/userspace-tso.rst
> index 0fbac93a5..65655c0c2 100644
> --- a/Documentation/topics/userspace-tso.rst
> +++ b/Documentation/topics/userspace-tso.rst
> @@ -113,6 +113,12 @@ __ https://patches.dpdk.org/patch/64136/
>  This fix is expected to be included in the 19.11.1 release. When OVS migrates
>  to this DPDK release, this limitation can be removed.
>  
> +All kernel devices that use the raw socket interface (veth, for example)
> +require the kernel commit 9d2f67e43b73 ("net/packet: fix packet drop
> +as of virtio gso") in order to work properly. This commit was merged
> +in upstream kernel 4.19-rc7, so make sure your kernel is either
> +newer or contains the backport.
> +
>  ~~~~~~~~~~~~~~~~~~
>  Performance Tuning
>  ~~~~~~~~~~~~~~~~~~
> 



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