Red Hat Bugzilla – Bug 444765
virtio_net driver causing hang at shutdown
Last modified: 2008-06-06 03:44:28 EDT
Running KVM guests with a virtio nic, I'm seeing a hang at shutdown at
"iptables: Unloading modules:"
Turns out nf_conntrack is blocking because virtio_net has left a TX skb dangling.
Adding to F9Blocker because shutdown hangs suck and the fix seems fairly safe.
Created attachment 304236 [details]
Changing version to '9' as part of upcoming Fedora 9 GA.
More information and reason for this action is here:
Did we get a better fix for this? Upstream didn't really like the proposed one...
(In reply to comment #3)
> Upstream didn't really like the proposed one...
No, upstream wants to add a *host* feature to throttle tx notification
interrupts and have the guest detect when that feature is available. When it
isn't available, the guest will need to poll for tx completion in a timer.
So, upstream is going to merge my patch and later add the throttling feature to
the host and the guest-side code to take advantage of it:
Patch in 22.214.171.124-29
kernel-126.96.36.199-30.fc9 has been submitted as an update for Fedora 9
kernel-188.8.131.52-30.fc9 has been pushed to the Fedora 9 testing repository. If problems still persist, please make note of it in this bug report.
If you want to test the update, you can install it with
su -c 'yum --enablerepo=updates-testing update kernel'. You can provide feedback for this update here: http://admin.fedoraproject.org/updates/F9/FEDORA-2008-4630
kernel-184.108.40.206-30.fc9 has been pushed to the Fedora 9 stable repository. If problems still persist, please make note of it in this bug report.