Re: [PATCH v1 06/10] mm: Allow deferred splitting of arbitrary large anon folios
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- To: Ryan Roberts <ryan.roberts@xxxxxxx>
- Subject: Re: [PATCH v1 06/10] mm: Allow deferred splitting of arbitrary large anon folios
- From: Yu Zhao <yuzhao@xxxxxxxxxx>
- Date: Mon, 26 Jun 2023 20:54:54 -0600
- Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>, "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>, Yin Fengwei <fengwei.yin@xxxxxxxxx>, David Hildenbrand <david@xxxxxxxxxx>, Catalin Marinas <catalin.marinas@xxxxxxx>, Will Deacon <will@xxxxxxxxxx>, Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>, Christian Borntraeger <borntraeger@xxxxxxxxxxxxx>, Sven Schnelle <svens@xxxxxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linux-alpha@xxxxxxxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linux-ia64@xxxxxxxxxxxxxxx, linux-m68k@xxxxxxxxxxxxxxx, linux-s390@xxxxxxxxxxxxxxx
- In-reply-to: <20230626171430.3167004-7-ryan.roberts@arm.com>
- References: <20230626171430.3167004-1-ryan.roberts@arm.com> <20230626171430.3167004-7-ryan.roberts@arm.com>
On Mon, Jun 26, 2023 at 11:15 AM Ryan Roberts <ryan.roberts@xxxxxxx> wrote:
>
> With the introduction of large folios for anonymous memory, we would
> like to be able to split them when they have unmapped subpages, in order
> to free those unused pages under memory pressure. So remove the
> artificial requirement that the large folio needed to be at least
> PMD-sized.
>
> Signed-off-by: Ryan Roberts <ryan.roberts@xxxxxxx>
Reviewed-by: Yu Zhao <yuzhao@xxxxxxxxxx>
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