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Date:   Wed, 29 Jun 2022 20:48:30 +0200
From:   David Hildenbrand <>
To:     Alex Sierra <>,
Subject: Re: [PATCH v7 02/14] mm: add zone device coherent type memory support

On 29.06.22 05:54, Alex Sierra wrote:
> Device memory that is cache coherent from device and CPU point of view.
> This is used on platforms that have an advanced system bus (like CAPI
> or CXL). Any page of a process can be migrated to such memory. However,
> no one should be allowed to pin such memory so that it can always be
> evicted.
> Signed-off-by: Alex Sierra <>
> Acked-by: Felix Kuehling <>
> Reviewed-by: Alistair Popple <>
> [hch: rebased ontop of the refcount changes,
>       removed is_dev_private_or_coherent_page]
> Signed-off-by: Christoph Hellwig <>

>From what I can tell, this looks good to me

Acked-by: David Hildenbrand <>


David / dhildenb

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