On Tue, 11 Apr 2017 10:56:45 +0530 Pushkar Jambhlekar <pushkar....@gmail.com> wrote:
> Changing rc value from VM_FAULT_FALLBACK to VM_FAULT_SIGBUS for an unknown / > unsupported fault size. > > ... > > --- a/drivers/dax/dax.c > +++ b/drivers/dax/dax.c > @@ -590,7 +590,7 @@ static int dax_dev_huge_fault(struct vm_fault *vmf, > rc = __dax_dev_pud_fault(dax_dev, vmf); > break; > default: > - rc = VM_FAULT_FALLBACK; > + rc = VM_FAULT_SIGBUS; > } > rcu_read_unlock(); The change seems to make sense but more info would be helpful. What is wrong with the current code? ie, what goes wrong if we return VM_FAULT_FALLBACK here?
