linux-ext4 - Re: [PATCH v7 02/14] mm: add zone device coherent type memory support

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Date:   Wed, 29 Jun 2022 20:48:30 +0200
From:   David Hildenbrand <david@...hat.com>
To:     Alex Sierra <alex.sierra@....com>, jgg@...dia.com
Cc:     Felix.Kuehling@....com, linux-mm@...ck.org, rcampbell@...dia.com,
        linux-ext4@...r.kernel.org, linux-xfs@...r.kernel.org,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        hch@....de, jglisse@...hat.com, apopple@...dia.com,
        willy@...radead.org, akpm@...ux-foundation.org
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 <alex.sierra@....com>
> Acked-by: Felix Kuehling <Felix.Kuehling@....com>
> Reviewed-by: Alistair Popple <apopple@...dia.com>
> [hch: rebased ontop of the refcount changes,
>       removed is_dev_private_or_coherent_page]
> Signed-off-by: Christoph Hellwig <hch@....de>

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

Acked-by: David Hildenbrand <david@...hat.com>

-- 
Thanks,

David / dhildenb