Currently to make sure that every page table entry is read just once
gup_fast walks perform READ_ONCE and pass pXd value down to the next
gup_pXd_range function by value e.g.:
static int gup_pud_range(p4d_t p4d, unsigned long addr, unsigned long end,
unsigned int flags, st
On Fri, Sep 11, 2020 at 04:40:00PM -0300, Jason Gunthorpe wrote:
> These would probably be better as static inlines though, as only s390
> compiles will type check pudp like this.
Never mind, it must be a macro - still need brackets though
Jason
On Fri, Sep 11, 2020 at 09:03:06PM +0200, Vasily Gorbik wrote:
> diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h
> index e8cbc2e795d5..e899d3506671 100644
> +++ b/include/linux/pgtable.h
> @@ -1427,6 +1427,16 @@ typedef unsigned int pgtbl_mod_mask;
> #define mm_pmd_folded(mm)__i
On Fri, Sep 11, 2020 at 12:04 PM Vasily Gorbik wrote:
>
> Currently to make sure that every page table entry is read just once
> gup_fast walks perform READ_ONCE and pass pXd value down to the next
> gup_pXd_range function by value e.g.:
[ ... ]
Ack, this looks sane to me.
I was going to ask how
