Hi, could you consider applying commit c09664bb44184b3846e8c5254db4eae4b932682a into your 3.8 kernel tree? It's simple patch from 3.9 that fixes deadlock in KVM. That deadlock is also present in 3.8 and we've successfully tested this patch on our infrastructure. Patch is also here: https://patchwork.kernel.org/patch/2294591/ -- mg