[Bug 254695] Hyper-V: Kernel Panic: Assertion in_epoch(net_epoch_preempt) failed at netinet/tcp_lro.c:915

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=254695

Wei Hu <weh at microsoft.com> changed:

           What    |Removed                     |Added
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                 CC|                            |weh at microsoft.com

--- Comment #6 from Wei Hu <weh at microsoft.com> ---
It hit this assert in tcp_lro.c

 911 tcp_lro_lookup(struct lro_ctrl *lc, struct lro_entry *le)
 912 {
 913         struct inpcb *inp = NULL;
 914
 915         NET_EPOCH_ASSERT();          <--- panic here
 916         switch (le->eh_type) {


How often does it occur? I am not familiar to the lro and epoch code. the
HyperV hn driver had couple commit since March 12. The commits are about RSC
support for packets from same host. Is the NFS server VM running on the same
Hyper-V host?

If it is easy for your reproduce on the current build, can you try any build
before March 12 to see if it is reproducible?

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