Re: [PATCH v3 02/16] mm/hugetlb: take src_mm->write_protect_seq in copy_hugetlb_page_range()

[Vlastimil Babka]

On 3/29/22 18:04, David Hildenbrand wrote:
> Let's do it just like copy_page_range(), taking the seqlock and making
> sure the mmap_lock is held in write mode.
> 
> This allows for add a VM_BUG_ON to page_needs_cow_for_dma() and
> properly synchronizes cocnurrent fork() with GUP-fast of hugetlb pages,

			concurrent

> which will be relevant for further changes.
> 
> Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>

Acked-by: Vlastimil Babka <vbabka@xxxxxxx>