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

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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.




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