[Bug 273372] SR-IOV Networking in Bhyve Causes Chelsio T520-SO-CR to Fail on Host, Kernel Panic if Reset
Date: Tue, 05 Sep 2023 16:28:57 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=273372
Navdeep Parhar <np@FreeBSD.org> changed:
What |Removed |Added
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CC| |np@FreeBSD.org
--- Comment #2 from Navdeep Parhar <np@FreeBSD.org> ---
I tried 13.2 as well as 14.0-alpha3 on bare metal running 13.2 and 14.0-alpha3
inside bhyve VMs. The host creates VF devices from a T520 and passes them
through -- one to each VM. The cxgbev VF driver inside the VM worked properly
in all cases.
The only bug I ran into was the kernel creating unusable VFs for a card in a
particular slot. It was fixed in
https://cgit.freebsd.org/src/commit/?id=7063f94283af60818429a0c2d70e80ae4ad5c146
That is not the root cause of this problem.
Can you please try these to debug your problem further:
1. Reduce num_vfs to 2 or 4 (from 14) temporarily, for testing.
2. When the problem occurs, grab the device log _before_ attempting any
ifconfig
down/up. sysctl -n dev.t5nex.0.misc.devlog
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