On Wed, 2013-04-03 at 05:32 +0100, Ben Hutchings wrote: > Package: src:linux-2.6 > Version: 2.6.32-48squeeze1 > Severity: important > Tags: upstream fixed-upstream patch > > I'm trying to test backports of some security fixes releated to KVM > device assignment, not having tried to use this feature in squeeze. > > Every time I try to assign a device using virt-manager, the kernel > panics - even with a kernel version before any of the backported fixes > in this area (2.6.32-41). [...] This happens when the device is rapidly assigned and then de-assigned to a VM. This is happening on my test system because libvirt decides the devices I'm choosing are unsuitable, but not before assigning them (very weird behaviour). There is a workaround which is to use kernel parameter 'intel_iommu=on,strict' rather than simply 'intel_iommu=on', but this can have a significant performance impact. Ben. -- Ben Hutchings Power corrupts. Absolute power is kind of neat. - John Lehman, Secretary of the US Navy 1981-1987
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