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References: <20230626171430.3167004-1-ryan.roberts@arm.com> <20230626171430.3167004-7-ryan.roberts@arm.com>
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From:   Yu Zhao <yuzhao@google.com>
Date:   Mon, 26 Jun 2023 20:54:54 -0600
Message-ID: <CAOUHufYBSc=RKpPg4PuHduJiWKOe+vpA_rZVo-9-gFvVue0huQ@mail.gmail.com>
Subject: Re: [PATCH v1 06/10] mm: Allow deferred splitting of arbitrary large
 anon folios
To:     Ryan Roberts <ryan.roberts@arm.com>
Cc:     Andrew Morton <akpm@linux-foundation.org>,
        "Matthew Wilcox (Oracle)" <willy@infradead.org>,
        "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
        Yin Fengwei <fengwei.yin@intel.com>,
        David Hildenbrand <david@redhat.com>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will@kernel.org>,
        Geert Uytterhoeven <geert@linux-m68k.org>,
        Christian Borntraeger <borntraeger@linux.ibm.com>,
        Sven Schnelle <svens@linux.ibm.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        "H. Peter Anvin" <hpa@zytor.com>, linux-kernel@vger.kernel.org,
        linux-mm@kvack.org, linux-alpha@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org,
        linux-m68k@lists.linux-m68k.org, linux-s390@vger.kernel.org
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On Mon, Jun 26, 2023 at 11:15=E2=80=AFAM Ryan Roberts <ryan.roberts@arm.com=
> 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@arm.com>

Reviewed-by: Yu Zhao <yuzhao@google.com>