KVM hosts crashed

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Hello everybody,


I got crashes on my KVM hosts. They are in a 6 nodes cluster of Proxmox VE, the VM disks are LV through AoE and i use Coraid SAN storage (all the device inside guests are Virtio - /dev/vdX, network).

For one of them (Node3), the differences between the other servers (Node2 and Node6) were it was using 2.6.32-47 kernel (ksm module loaded but inactive)
and on the others, 2.6.32-33 kernel was running (ksm module not loaded).
On Node3, I switched back to 2.6.32-33 kernel, and seemed to be better.

However, a few weeks ago, two hosts of the same cluster running 2.6.32-33 kernel crashed too (Node2 and Node6).

The pictures of the stacktraces i took are visible at http://imgur.com/a/FTfuM .

Is someone have an idea on what could have been occurred ?
Answers, questions, all is welcome.

Thanks in advance.
Germain--
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