From: Lance Yang <lance.yang@linux.dev>
To: ye.liu@linux.dev
Cc: akpm@linux-foundation.org, david@kernel.org, ljs@kernel.org,
liuye@kylinos.cn, ziy@nvidia.com, baolin.wang@linux.alibaba.com,
Liam.Howlett@oracle.com, npache@redhat.com, ryan.roberts@arm.com,
dev.jain@arm.com, baohua@kernel.org, lance.yang@linux.dev,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] mm/khugepaged: use ALIGN helpers for PMD alignment
Date: Thu, 9 Apr 2026 11:12:42 +0800 [thread overview]
Message-ID: <20260409031242.91778-1-lance.yang@linux.dev> (raw)
In-Reply-To: <20260409014323.2385982-1-ye.liu@linux.dev>
On Thu, Apr 09, 2026 at 09:43:22AM +0800, Ye Liu wrote:
>From: Ye Liu <liuye@kylinos.cn>
>
>PMD alignment in khugepaged is currently implemented using a mix of
>rounding helpers and open-coded bitmask operations.
>
>Use ALIGN() and ALIGN_DOWN() consistently for PMD-sized address range
>alignment, matching the preferred style for address and size handling.
One more spot in madvise_collapse():
hend = min(hend, vma->vm_end & HPAGE_PMD_MASK);
Maybe switch that one to ALIGN_DOWN() as well.
And there is also in try_collapse_pte_mapped_thp():
unsigned long haddr = addr & HPAGE_PMD_MASK;
Just a thought :)
Lance
next prev parent reply other threads:[~2026-04-09 3:13 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-09 1:43 [PATCH v2] mm/khugepaged: use ALIGN helpers for PMD alignment Ye Liu
2026-04-09 1:53 ` Zi Yan
2026-04-09 2:27 ` Barry Song
2026-04-09 3:12 ` Lance Yang [this message]
2026-04-09 7:36 ` Lorenzo Stoakes
2026-04-09 7:28 ` Lorenzo Stoakes
2026-04-09 7:54 ` David Hildenbrand (Arm)
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