Re: [PATCH v2 1/2] mm/userfaultfd: don't place zeropages when zeropages are disallowed

[David Hildenbrand]

On 11.04.24 14:26, Alexander Gordeev wrote:
> On Wed, Mar 27, 2024 at 06:17:36PM +0100, David Hildenbrand wrote:
>
> Hi David,
> ...
> >   static int mfill_atomic_pte_zeropage(pmd_t *dst_pmd,
> >   				     struct vm_area_struct *dst_vma,
> >   				     unsigned long dst_addr)
> > @@ -324,6 +355,9 @@ static int mfill_atomic_pte_zeropage(pmd_t *dst_pmd,
> >   	spinlock_t *ptl;
> >   	int ret;
> >   
> > +	if (mm_forbids_zeropage(dst_vma->mm))
>
> I assume, you were going to pass dst_vma->vm_mm here?
> This patch does not compile otherwise.

Ah, I compiled it only on x86, where the parameter is ignored ... and 
for testing the code path I forced mm_forbids_zeropage to be 1 on x86.

Yes, this must be dst_vma->vm_mm.

Thanks!

--
Cheers,

David / dhildenb