libvirt users - Feb 2022 - random but often VMs' - BUG: soft lockup

Hi guys

I see this often(perhaps once a day) on VMs:

... watchdog: BUG: soft -lockup - CPU#1 stuck for xxXXxxs! [swapper/1:0]

At the moment I cannot say I see a pattern - perhaps not spotted one yet 
- and this can happen to any VM between any one of the three hosts, 
which hosts are CentOS 9 on AMD Ryzen 5600G hardware. VMs are mostly 
CentOS 8 but a few Ubuntus too.

Anybody would know what that might be, is, a symptom of? But most 
importantly how to dig in to troubleshoot this?(when this happen then 
such affected VM I can only hard reset)

many thanks, L.

On 2/22/22 09:48, lejeczek wrote:
> Hi guys
> 
> I see this often(perhaps once a day) on VMs:
> 
> ... watchdog: BUG: soft -lockup - CPU#1 stuck for xxXXxxs! [swapper/1:0]

I used to see these when I suspended the host with guests running. But
in your case, because of the "swapper" suffix I suspect that the host
has gone trashing and thus can't schedule vCPUs fast enough to appease
watchdog.

Michal