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Date:   Mon, 18 Jul 2022 12:51:23 +0200
From:   David Hildenbrand <>
To:     Alex Sierra <>,
Subject: Re: [PATCH v9 04/14] mm: handling Non-LRU pages returned by

On 15.07.22 17:05, Alex Sierra wrote:
> With DEVICE_COHERENT, we'll soon have vm_normal_pages() return
> device-managed anonymous pages that are not LRU pages. Although they
> behave like normal pages for purposes of mapping in CPU page, and for
> COW. They do not support LRU lists, NUMA migration or THP.
> Callers to follow_page() currently don't expect ZONE_DEVICE pages,
> however, with DEVICE_COHERENT we might now return ZONE_DEVICE. Check
> for ZONE_DEVICE pages in applicable users of follow_page() as well.
> Signed-off-by: Alex Sierra <>
> Acked-by: Felix Kuehling <> (v2)
> Reviewed-by: Alistair Popple <> (v6)

Acked-by: David Hildenbrand <>


David / dhildenb

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