Re: [PATCH v1 03/14] mm: add iomem vma selection for memory migration

Christoph Hellwig
2021-08-25T07:46:07Z

On Tue, Aug 24, 2021 at 10:48:17PM -0500, Alex Sierra wrote:
> } else {
> - if (!(migrate->flags & MIGRATE_VMA_SELECT_SYSTEM))
> + if (!(migrate->flags & MIGRATE_VMA_SELECT_SYSTEM) &&
> + !(migrate->flags & MIGRATE_VMA_SELECT_IOMEM))
> goto next;
> pfn = pte_pfn(pte);
> if (is_zero_pfn(pfn)) {

.. also how is this going to work for the device public memory? That
should be pte_special() an thus fail vm_normal_page.