linux-kernel - Re: [PATCH v5] mm/rmap: do not add fully unmapped large folio to deferred split list

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Date: Thu, 2 May 2024 15:18:08 +0200
From: Alexander Gordeev <agordeev@...ux.ibm.com>
To: Zi Yan <ziy@...dia.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        Yang Shi <shy828301@...il.com>, Ryan Roberts <ryan.roberts@....com>,
        Barry Song <21cnbao@...il.com>, David Hildenbrand <david@...hat.com>,
        Lance Yang <ioworker0@...il.com>, linux-kernel@...r.kernel.org,
        linux-s390@...r.kernel.org
Subject: Re: [PATCH v5] mm/rmap: do not add fully unmapped large folio to
 deferred split list

On Wed, May 01, 2024 at 09:38:24AM -0400, Zi Yan wrote:
Hi Zi,
> @@ -1557,9 +1557,8 @@ static __always_inline void __folio_remove_rmap(struct folio *folio,
>                  * page of the folio is unmapped and at least one page
>                  * is still mapped.
>                  */
> -               if (folio_test_anon(folio) &&
> -                   list_empty(&folio->_deferred_list) &&
> -                   partially_mapped)
> +               if (folio_test_anon(folio) && partially_mapped &&
> +                   list_empty(&folio->_deferred_list))
>                         deferred_split_folio(folio);
>         }

That helps.

> Best Regards,
> Yan, Zi

Thanks!