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Message-ID: <95b3c8f3-2e4d-fa2f-1552-580236eea485@redhat.com>
Date:   Mon, 18 Jul 2022 12:51:23 +0200
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Subject: Re: [PATCH v9 04/14] mm: handling Non-LRU pages returned by
 vm_normal_pages
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To:     Alex Sierra <alex.sierra@amd.com>, jgg@nvidia.com
Cc:     Felix.Kuehling@amd.com, linux-mm@kvack.org, rcampbell@nvidia.com,
        linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org,
        amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
        hch@lst.de, jglisse@redhat.com, apopple@nvidia.com,
        willy@infradead.org, akpm@linux-foundation.org
References: <20220715150521.18165-1-alex.sierra@amd.com>
 <20220715150521.18165-5-alex.sierra@amd.com>
From:   David Hildenbrand <david@redhat.com>
Organization: Red Hat
In-Reply-To: <20220715150521.18165-5-alex.sierra@amd.com>
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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 <alex.sierra@amd.com>
> Acked-by: Felix Kuehling <Felix.Kuehling@amd.com> (v2)
> Reviewed-by: Alistair Popple <apopple@nvidia.com> (v6)
>

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

-- 
Thanks,

David / dhildenb