Bug 1301860 - vCPU offline hang in real-time guest
vCPU offline hang in real-time guest
Status: NEW
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: qemu-kvm-rhev (Show other bugs)
Unspecified Unspecified
medium Severity medium
: rc
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Assigned To: Peter Xu
Pei Zhang
Depends On:
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Reported: 2016-01-26 03:22 EST by Peter Xu
Modified: 2017-07-06 00:34 EDT (History)
10 users (show)

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Comment 3 Daniel Bristot de Oliveira 2016-02-03 14:34:47 EST
Hi Peter,

There are some known hotplug issues on kernel-rt. For an example, see BZ1267425.

On this BZ I was able to identify the root cause by inspecting a
vmcore, and on these cases, the vmcore is the best tool to understand
why the system hanged.

Can you please capture a vmcore of the VM after it hangs on hotplug

Here is a document from support explaining how to capture a vmcore of a VM:


We will also need the debuginfo packages of the kernel that was running
on the VM.

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