[CentOS-virt] Stability issues since moving to 4.6 - Kernel paging request bug + VM left in null state
srn at prgmr.com
Wed Nov 8 00:57:47 UTC 2017
On 11/07/2017 03:12 PM, Nathan March wrote:
> Since moving from 4.4 to 4.6, I've been seeing an increasing number of
> stability issues on our hypervisors. I'm not clear if there's a singular
> root cause here, or if I'm dealing with multiple bugs.
> One of the more common ones I've seen, is a VM on shutdown will remain in
> the null state and a kernel bug is thrown:
> xen001 log # xl list
> Name ID Mem VCPUs State
> Domain-0 0 6144 24 r-----
> (null) 3 0 1 --pscd
> [89920.839074] BUG: unable to handle kernel paging request at
> This is on xen 4.6.6-4.el6 with 4.9.58-29.el6.x86_64. I see these issues
> across a wide number of systems with from both Dell and Supermicro, although
> we run the same Intel x540 10gb nic's in each system with the same netapp
> nfs backend storage.
We don't use NFS and have not seen the exact same issue.
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