On Tue, Jan 30, 2024 at 10:59:13AM -0600, Seth Forshee wrote:

On Tue, Jan 30, 2024 at 05:14:23PM +0100, Paul Menzel wrote:

quoted

Dear Seth,


Thank you for bring this up.

Am 30.01.24 um 15:17 schrieb Seth Forshee:

quoted

I got a inquiry from a colleague about a behavior he's seeing with i40e
but not with other NICs. The interfaces are bonded with a XDP
load-balancer program attached to them. After 'ip link set ethX down; ip
link set ethX up' on one of the interfaces the XDP program on that
interface is no longer transmitting packets. He found that tx starts
again after running 'sudo ethtool -t ethX'.

There's a 'i40e 0000:d8:00.1: VSI seid 391 XDP Tx ring 0 disable
timeout' message in dmesg when disabling the interface. I've included
the relevant portions from dmesg below.

This was first observed with a 6.1 kernel, but we've confirmed that the
behavior is the same in 6.7. I realize the firmware is pretty old, so
far our attempts to update the NVM have failed.

Does that mean, the problem didn’t happen before Linux 6.1? If so, if you
have the reproducer and the time, bisecting the issue is normally the
fastest way to solve the issue.

No, sorry, I should have worded that better. I meant that they were
using 6.1 when they noticed the issue, not that kernels before 6.1 did
not have that issue. We've also tried a 5.15 kernel build now and still
see the issue there, we haven't tested anything older than that.

Hey Seth,

I am observing same thing on my side with xdpsock in txonly mode, so I'll
take a look at this and will keep you updated.

Thanks,
Seth