From: Will Deacon <will@kernel.org>
To: anshuman.khandual@arm.com, catalin.marinas@arm.com,
david@redhat.com, Zhenhua Huang <quic_zhenhuah@quicinc.com>
Cc: kernel-team@android.com, Will Deacon <will@kernel.org>,
ardb@kernel.org, ryan.roberts@arm.com, mark.rutland@arm.com,
joey.gouly@arm.com, dave.hansen@linux.intel.com,
akpm@linux-foundation.org, chenfeiyang@loongson.cn,
chenhuacai@kernel.org, linux-mm@kvack.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, quic_tingweiz@quicinc.com,
stable@vger.kernel.org
Subject: Re: [PATCH v9] arm64: mm: Populate vmemmap at the page level if not section aligned
Date: Tue, 11 Mar 2025 13:13:37 +0000 [thread overview]
Message-ID: <174169292046.277676.9363571702356367812.b4-ty@kernel.org> (raw)
In-Reply-To: <20250304072700.3405036-1-quic_zhenhuah@quicinc.com>
On Tue, 04 Mar 2025 15:27:00 +0800, Zhenhua Huang wrote:
> On the arm64 platform with 4K base page config, SECTION_SIZE_BITS is set
> to 27, making one section 128M. The related page struct which vmemmap
> points to is 2M then.
> Commit c1cc1552616d ("arm64: MMU initialisation") optimizes the
> vmemmap to populate at the PMD section level which was suitable
> initially since hot plug granule is always one section(128M). However,
> commit ba72b4c8cf60 ("mm/sparsemem: support sub-section hotplug")
> introduced a 2M(SUBSECTION_SIZE) hot plug granule, which disrupted the
> existing arm64 assumptions.
>
> [...]
Applied to arm64 (for-next/fixes), thanks!
[1/1] arm64: mm: Populate vmemmap at the page level if not section aligned
https://git.kernel.org/arm64/c/d4234d131b0a
Cheers,
--
Will
https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev
prev parent reply other threads:[~2025-03-11 13:13 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-04 7:27 Zhenhua Huang
2025-03-04 8:22 ` Oscar Salvador
2025-03-05 18:59 ` Catalin Marinas
2025-03-11 13:13 ` Will Deacon [this message]
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