Pushed a revert of d6990976af7c "vti6: fix PMTU caching and reporting on
xmit" to fix this temporarily until we have a proper fix.
** Changed in: linux (Ubuntu Cosmic)
Status: Triaged => Fix Committed
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https://bugs.launchpad.net/bugs/1789436
Title:
pmtu.sh fails on 4.18 kernel
Status in linux package in Ubuntu:
Fix Committed
Status in linux source package in Cosmic:
Fix Committed
Bug description:
pmtu.sh is a network selftest that was introduced on 4.17. It is
currently failing on 4.18. After revert of ccd740cbc6 "vti6: Add pmtu
handling to vti6_xmit.", it passes.
The fail is in the nature of holding netdevices refcounts, so some
network operations start hanging, including the loading and removal of
network modules.
[ 159.936543] unregister_netdevice: waiting for veth_b to become
free. Usage count = 1
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