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From: "David Hildenbrand (Arm)" <david@kernel.org>
To: Luiz Capitulino <luizcap@redhat.com>,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	baolin.wang@linux.alibaba.com, ziy@nvidia.com,
	lance.yang@linux.dev
Cc: corbet@lwn.net, tsbogend@alpha.franken.de, maddy@linux.ibm.com,
	mpe@ellerman.id.au, agordeev@linux.ibm.com,
	gerald.schaefer@linux.ibm.com, hca@linux.ibm.com,
	gor@linux.ibm.com, x86@kernel.org, dave.hansen@linux.intel.com,
	djbw@kernel.org, vishal.l.verma@intel.com, dave.jiang@intel.com,
	akpm@linux-foundation.org, lorenzo.stoakes@oracle.com
Subject: Re: [PATCH v4 8/9] mm: replace thp_disabled_by_hw() with pgtable_has_pmd_leaves()
Date: Wed, 13 May 2026 17:50:41 +0200	[thread overview]
Message-ID: <2a0afa8c-15be-4766-ad3d-494875395b94@kernel.org> (raw)
In-Reply-To: <d4fbc41a51f8fe9ab55cc6792d60c6c2c504b4d4.1777663129.git.luizcap@redhat.com>

On 5/1/26 21:18, Luiz Capitulino wrote:
> Despite its name, thp_disabled_by_hw() just checks whether the
> architecture supports PMD-sized pages. It returns true when
> TRANSPARENT_HUGEPAGE_UNSUPPORTED is set in transparent_hugepage_flags,
> this only occurs if the architecture implements arch_has_pmd_leaves()
> and that function returns false.
> 
> Since pgtable_has_pmd_leaves() provides the same semantics, use it
> instead.
> 
> Reviewed-by: Lance Yang <lance.yang@linux.dev>
> Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
> Acked-by: Zi Yan <ziy@nvidia.com>
> Signed-off-by: Luiz Capitulino <luizcap@redhat.com>
> ---

Makes sense, and the next patch will actually limit it only to PMD orders.

Acked-by: David Hildenbrand (Arm) <david@kernel.org>

-- 
Cheers,

David


  reply	other threads:[~2026-05-13 15:50 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-05-01 19:18 [PATCH v4 0/9] mm: thp: always enable mTHP support Luiz Capitulino
2026-05-01 19:18 ` [PATCH v4 1/9] docs: tmpfs: remove implementation detail reference Luiz Capitulino
2026-05-01 19:18 ` [PATCH v4 2/9] mm: introduce pgtable_has_pmd_leaves() Luiz Capitulino
2026-05-06 17:50   ` (sashiko review) " Luiz Capitulino
2026-05-13 15:30   ` David Hildenbrand (Arm)
2026-05-14  1:52     ` Luiz Capitulino
2026-05-13 15:36   ` David Hildenbrand (Arm)
2026-05-14  2:18     ` Luiz Capitulino
2026-05-01 19:18 ` [PATCH v4 3/9] drivers: dax: use pgtable_has_pmd_leaves() Luiz Capitulino
2026-05-13 15:40   ` David Hildenbrand (Arm)
2026-05-14  2:25     ` Luiz Capitulino
2026-05-01 19:18 ` [PATCH v4 4/9] drivers: nvdimm: " Luiz Capitulino
2026-05-01 19:18 ` [PATCH v4 5/9] mm: debug_vm_pgtable: " Luiz Capitulino
2026-05-01 19:18 ` [PATCH v4 6/9] mm: shmem: drop has_transparent_hugepage() usage Luiz Capitulino
2026-05-06 18:12   ` (sashiko review) " Luiz Capitulino
2026-05-01 19:18 ` [PATCH v4 7/9] treewide: introduce arch_has_pmd_leaves() Luiz Capitulino
2026-05-06 18:22   ` (sashiko review) " Luiz Capitulino
2026-05-06 18:30     ` Luiz Capitulino
2026-05-01 19:18 ` [PATCH v4 8/9] mm: replace thp_disabled_by_hw() with pgtable_has_pmd_leaves() Luiz Capitulino
2026-05-13 15:50   ` David Hildenbrand (Arm) [this message]
2026-05-01 19:18 ` [PATCH v4 9/9] mm: thp: always enable mTHP support Luiz Capitulino
2026-05-06  5:46   ` Baolin Wang
2026-05-06 18:34   ` (sashiko review) " Luiz Capitulino
2026-05-13 15:58   ` David Hildenbrand (Arm)
2026-05-14  1:14     ` Baolin Wang
2026-05-03 15:02 ` [PATCH v4 0/9] " Andrew Morton
2026-05-04 19:11   ` Luiz Capitulino
2026-05-14  6:35 ` Lorenzo Stoakes

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