On 6/6/19 1:06 PM, Yu-cheng Yu wrote: > --- a/mm/mmap.c > +++ b/mm/mmap.c > @@ -1703,6 +1703,9 @@ static inline int accountable_mapping(struct file *file, vm_flags_t vm_flags) > if (file && is_file_hugepages(file)) > return 0; > > + if (arch_copy_pte_mapping(vm_flags)) > + return 1; > + > return (vm_flags & (VM_NORESERVE | VM_SHARED | VM_WRITE)) == VM_WRITE; > } > > @@ -3319,6 +3322,8 @@ void vm_stat_account(struct mm_struct *mm, vm_flags_t flags, long npages) > mm->stack_vm += npages; > else if (is_data_mapping(flags)) > mm->data_vm += npages; > + else if (arch_copy_pte_mapping(flags)) > + mm->data_vm += npages; > } This classifies shadow stack as data instead of stack. That seems a wee bit counterintuitive. Why did you make this choice?
