Looking Glass KVMFR documentation

Operating Systems & Open Source Looking Glass
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Hello,

Just a quick suggestion - there is a known issue when using virtiofs with the KVMFR module.

It took me a while to figure out that this was causing my issue with the KVMFR module. Would it be possible to add a disclaimer for this to the Looking Glass KVMFR documentation? Might help others who run into the same problem. I put a snippet from my QEMU log file below if you want to show that in the documentation as an example for what to look out for.

If there is a better place to send this suggestion let me know.

Thanks for all of the development on Looking Glass, it’s an awesome product. I put off trying KVM with LG for a long time, mainly using VMWare Workstation instead. The performance is amazing, wish I hadn’t waited so long.

2024-09-13T11:49:09.600811Z qemu-system-x86_64: vhost_set_mem_table failed: Input/output error (5)
2024-09-13T11:49:09.600834Z qemu-system-x86_64: Error starting vhost: 5
2024-09-13T11:49:09.600853Z qemu-system-x86_64: Failed to write msg. Wrote -1 instead of 20.
2024-09-13T11:49:09.600858Z qemu-system-x86_64: vhost_set_vring_call failed 22
2024-09-13T11:49:09.600862Z qemu-system-x86_64: Failed to set msg fds.
2024-09-13T11:49:09.600864Z qemu-system-x86_64: vhost_set_vring_call failed 22
2024-09-13T11:49:09.601316Z qemu-system-x86_64: Unexpected end-of-file before all data were read
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submit a pull request to the git repo brobro

Good first post though

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I don’t believe any comment regarding this issue will make it into the LG official documentation. This is not an LG issue and is related to a bug in the way QEMU is enumerating IVSHMEM. You are welcome though to setup an account on the LG wiki and add a comment there.

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