Re: "BUG: soft lockup" and frozen guest

[Vitaly Kuznetsov <vkuznets@redhat.com>]

Christopher Pereira <kripper@imatronix.cl> writes:

> Hi,
>
> I have been experiencing some random guest crashes in the last years and 
> would like to invest some time in trying to debug them with your help.
>
> Symptom is:
>
> 1) "BUG: soft lockup" & "CPU#* stuck for *s!" messages during high load 
> on the guest
> 2) At some point later (eg. 12 hours later), the guest just hangs 
> without any message and must be destroyed / rebooted.
>
> I attached the relevant kernel messages.
>
> Host (spec: Intel(R) Xeon(R) CPU E5645) is running:
>
>     kernel-3.10.0-327.el7.x86_64
>     libvirt-daemon-kvm-1.2.17-13.el7_2.5.x86_64
>     qemu-kvm-ev-2.3.0-31.el7_2.10.1.x86_64
>     qemu-kvm-common-ev-2.3.0-31.el7_2.10.1.x86_64

This is pretty old stuff, e.g. kernel-3.10.0-327.el7 was release with
RHEL-7.2 (Nov 2015). As this is upstream mailing list, it would be great
if you could build an upstream kernel (should work with EL7 userspace)
and try to reproduce.

-- 
Vitaly