Re: [PATCH 06/26] mm/csky: Use general page fault accounting

[Guo Ren]

On Sat, Jun 20, 2020 at 12:05 AM Peter Xu <peterx@xxxxxxxxxx> wrote:
>
> Use the general page fault accounting by passing regs into handle_mm_fault().
> It naturally solve the issue of multiple page fault accounting when page fault
> retry happened.
>
> CC: Guo Ren <guoren@xxxxxxxxxx>
> CC: linux-csky@xxxxxxxxxxxxxxx
> Signed-off-by: Peter Xu <peterx@xxxxxxxxxx>
> ---
>  arch/csky/mm/fault.c | 12 +-----------
>  1 file changed, 1 insertion(+), 11 deletions(-)
>
> diff --git a/arch/csky/mm/fault.c b/arch/csky/mm/fault.c
> index b14f97d3cb15..a3e0aa3ebb79 100644
> --- a/arch/csky/mm/fault.c
> +++ b/arch/csky/mm/fault.c
> @@ -151,7 +151,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long write,
>          * the fault.
>          */
>         fault = handle_mm_fault(vma, address, write ? FAULT_FLAG_WRITE : 0,
> -                               NULL);
> +                               regs);
what's your kernel version ? ï4th arg exsist ?ï
        /*
         * If for any reason at all we couldn't handle the fault,
         * make sure we exit gracefully rather than endlessly redo
         * the fault.
         */
        fault = handle_mm_fault(vma, address, write ? FAULT_FLAG_WRITE : 0);
        if (unlikely(fault & VM_FAULT_ERROR)) {



-- 
Best Regards
 Guo Ren

ML: https://lore.kernel.org/linux-csky/