Ubuntu
linux package

  1. Bug #1690085
  2. Comment #671

Comment 671 for bug 1690085

Revision history for this message
In , z.wood23 (z.wood23-linux-kernel-bugs) wrote :

I haven't had the chance to get through the whole thread yet and not sure if I'll have enough time today. However, I wanted to quickly ask if anyone has faced this issue with an Intel processor?

We are seeing kernel panics due to the soft lockup issue with the following configuration:

CPU Architecture: Intel Skylake or Higher
vCPUs: 8
RAM: 52 GB
Kernel: 4.15.0
OS: Ubuntu 16.04.1

For some additional information, this setup does leverage Nested VMX to run Docker containers with the --privileged option enabled.

The soft lockups seems to occur at a rate of varying from 1-5% of our VMs getting impacted in a 24-hour period running in this configuration.

The load on the cluster does not seem to impact the frequency of the issue.

One thing I did notice is that it seems most/all of the kernel panics have had been involved with a call to smp_call_function_single.

Since I have not made it far enough through this thread, I'm not sure if the focus on this is exclusively on AMD, or if anyone else had an Intel example?

Is there a fix in the pipe for this issue and if so, a target kernel version?