* Mathieu Desnoyers <mathieu.desnoy...@polymtl.ca> wrote:

> Here is a new backtrace, taken with a huge amount of debugging active, which 
> still 
> points to an interrupt handler nested over kvm_mmu_pte_write as the culprit. 
> It's 
> weird that the kvm code gets called on my modest Pentium M laptop, which I 
> think 
> has no VT-x support at all. I am not running any KVM VMs on this machine. The 
> problem still happens on 2.6.28.4, and Slub redzones did not identify any 
> memory 
> corruption. This could be due to kvm_mmu_pte_write which either should not be 
> called at all, or due to improper interrupt disabling in this function.

Does latest tip:master fix it? In particular this one:

  9cf161a: x86/cpa: make sure cpa is safe to call in lazy mmu mode

fixes a crasher related to KVM and mmu notifiers ...

        Ingo
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