Re: DANGER WILL ROBINSON, DANGER

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On 03/10/19 17:42, Jerome Glisse wrote:
> All that is needed is to make sure that vm_normal_page() will see those
> pte (inside the process that is mirroring the other process) as special
> which is the case either because insert_pfn() mark the pte as special or
> the kvm device driver which control the vm_operation struct set a
> find_special_page() callback that always return NULL, or the vma has
> either VM_PFNMAP or VM_MIXEDMAP set (which is the case with insert_pfn).
> 
> So you can keep the existing kvm code unmodified.

Great, thanks.  And KVM is already able to handle VM_PFNMAP/VM_MIXEDMAP,
so that should work.

Paolo




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