Debian 8 CPU stall

[Peter Grehan]

Hi Rajil,

> I get these messages in Debian 8 VM running in bhyve FreeBSD-11
> release.  Any idea what could be the issue:
>
> INFO: rcu_sched detected stalls on CPUs/tasks: {} (detected by 0,
> t=11047 jiffies, g=1038939, c=1038938, q=77)
> INFO: Stall ended before state dump start

  That's a sign that a vCPU wasn't able to run for an amount of time.

  Is the system oversubscribed ? i.e. more vCPUs than physical CPUs ? 
Or, is the guest performing a lot of i/o ?

later,

Peter.