I added the following description on the Debian bug. I close the Ubuntu bug, since you got it on a 4.9 kernel, and no still supported Ubuntu version has such kernel.
=== It looks like the warning appeared with this first commit: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=dcb17d22e1c2cd72e72190c736349a675362b3bc but was later corrected with this second one: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0b9aefea860063bb39e36bd7fe6c7087fed0ba87 The first commit was merged in the 4.9 tree, but not the second one (at least not up to 4.9.106), and was only merged in 4.11. So I would conclude the warning may be harmless, unless you got it on a >= 4.11 kernel. And I also verified I don't get it on such a newer kernel. I would close this bug, but it may eventually be nice to backport the second commit in 4.9 to avoid the harmless warning. ** Changed in: linux (Ubuntu) Status: Triaged => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1664072 Title: TCP: wlp1s0: Driver has suspect GRO implementation, TCP performance may be compromised. To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1664072/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
