Message-ID: <7eb43c35-5245-df9b-9e81-ae59d176839c@redhat.com>
Date:   Thu, 2 Feb 2023 09:39:21 +0100
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101
 Thunderbird/102.6.0
Subject: Re: [PATCH] mm/gup: Add folio to list when folio_isolate_lru()
 succeed
Content-Language: en-US
To:     Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        Alistair Popple <apopple@nvidia.com>,
        John Hubbard <jhubbard@nvidia.com>
Cc:     chinwen.chang@mediatek.com, andrew.yang@mediatek.com,
        linux-mm@kvack.org, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        linux-mediatek@lists.infradead.org
References: <20230131063206.28820-1-Kuan-Ying.Lee@mediatek.com>
From:   David Hildenbrand <david@redhat.com>
Organization: Red Hat
In-Reply-To: <20230131063206.28820-1-Kuan-Ying.Lee@mediatek.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Precedence: bulk

On 31.01.23 07:32, Kuan-Ying Lee wrote:
> If we call folio_isolate_lru() successfully, we will get
> return value 0. We need to add this folio to the
> movable_pages_list.
> 
> Fixes: 67e139b02d99 ("mm/gup.c: refactor check_and_migrate_movable_pages()")
> Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
> ---
>   mm/gup.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/mm/gup.c b/mm/gup.c
> index f3d2cccb89f8..918c364d01ac 100644
> --- a/mm/gup.c
> +++ b/mm/gup.c
> @@ -1914,7 +1914,7 @@ static unsigned long collect_longterm_unpinnable_pages(
>   			drain_allow = false;
>   		}
>   
> -		if (!folio_isolate_lru(folio))
> +		if (folio_isolate_lru(folio))
>   			continue;
>   
>   		list_add_tail(&folio->lru, movable_page_list);

Agreed that this deserves cc:stable

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

-- 
Thanks,

David / dhildenb