[Bug 60620] guest loses frequently (multiple times per day!) connectivity to network device

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https://bugzilla.kernel.org/show_bug.cgi?id=60620

Stefan Hajnoczi <stefanha@xxxxxxxxx> changed:

           What    |Removed                     |Added
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                 CC|                            |stefanha@xxxxxxxxx

--- Comment #13 from Stefan Hajnoczi <stefanha@xxxxxxxxx> ---
Michael Tsirkin and I are currently looking into a similar case.  The bug can
be triggered when the guest transmits large packets using GSO.  As a
workaround, try turning off TX offload features inside the guest:

# ethtool --offload eth0 tx off
# ethtool --offload eth0 tso off
# ethtool --offload eth0 ufo off
# ethtool --offload eth0 gso off

If the guest is already broken you can check whether it's the same bug by
looking at the output of "ifconfig <tap>" for the guest's tap device on the
host.  If you see "RX dropped" > 0 then the virtio-net device is stuck.

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