Hi all, I was looking at the function hva_to_pfn_fast(in virt/kvm/kvm_main) which is executed in an atomic context(even in non-atomic context, since hva_to_pfn_fast is much faster than hva_to_pfn_slow).
My question is can this be executed in an interrupt context? The motivation for this question is that in an interrupt context, we cannot assume "current" to be the task_struct of the process of interest. __get_user_pages_fast assume current->mm when walking the process page tables. So if this function hva_to_pfn_fast can be executed in an interrupt context, it would not be safe to retrive the pfn with __get_user_pages_fast. Thoughts on this? Thank you Bharath
