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Same problem: https://forum.proxmox.com/threads/system-lockup-how-to-diagnose.121540/ It does not happens with kernel 5.13

I have the same result or almost same problem. It always happens after a random number of VM stop and starts...

Only thing related to this issue doing a little research is this commit patch: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b83d23a2a38b1770da0491257ae81d52307f7816

We checked both and with linux bridge no issues. Trace of syslog and kern.log: https://paste.tecnocratica.net/view/1e885b69#KJPnCxSB5XDSfjOhpa3sQM6cGoCe7EKs Testing with a simple script to up and down the CT. It random crash on any kernel higher than 5.13 with OVS. Start with: Message from...

Yes, we have the exact issue since few month. We solved pining kernel 5.13. But seems that openvswitch version has a problem with LXC and 5.15

Can someone confirm if the freeze VMs has backup jobs?. We disabled PBS backups and since then we did not have freeze or hangs VMs. Check out this thread, seems related to this issue: https://lists.gnu.org/archive/html/qemu-devel/2020-02/msg04852.html I checked this commit and I though...

Confirmed. Same issue with random freeze VM and qmp command error after updating to 6.3-4

Yes, we are experimenting same issue 5 node cluster after updating to 6.3-4: CPU(s) 40 x Intel(R) Xeon(R) CPU E5-2660 v2 @ 2.20GHz (2 Sockets)