CPU soft lockups and server crashes on RHEL 7 Hypervisor
Issue
- When running a virtual machine which has more memory defined than available in one NUMA-region, the virtual machine could become non-responsive when running applications with high memory utilization. The virtual machine reports a lot of "
BUG: soft lockup - CPU#xx stuck for XXs!" messages in the system protocol. - A virtual machine becomes non responsive but is shown as healthy in RH(E)V GUI. Neither console nor
sshlogin is working.
Environment
- Red Hat Virtualization 7 Hypervisor (RHV-H)
- Red Hat Enterprise Linux 7 Hypervisor (RHEL7-H)
- Red Hat Enterprise Linux 7 with KVM (RHEL)
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