From: Lance Yang <lance.yang@linux.dev>
To: songmuchun@bytedance.com
Cc: maddy@linux.ibm.com, rppt@kernel.org, akpm@linux-foundation.org,
david@kernel.org, mpe@ellerman.id.au, npiggin@gmail.com,
chleroy@kernel.org, ritesh.list@gmail.com, sshegde@linux.ibm.com,
ljs@kernel.org, liam@infradead.org, vbabka@kernel.org,
surenb@google.com, mhocko@suse.com, qi.zheng@linux.dev,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, muchun.song@linux.dev,
Lance Yang <lance.yang@linux.dev>
Subject: Re: [PATCH v3 3/6] mm/sparse-vmemmap: drop Device DAX-specific population path
Date: Thu, 1 Oct 2026 22:27:14 +0800 [thread overview]
Message-ID: <20261001142714.17172-1-lance.yang@linux.dev> (raw)
In-Reply-To: <20260929053231.66085-4-songmuchun@bytedance.com>
On Tue, Sep 29, 2026 at 01:32:28PM +0800, Muchun Song wrote:
>The common vmemmap path selects the shared page for optimized mappings
>itself, so Device DAX no longer needs vmemmap_populate_compound_pages()
>to find a shared tail page and pass its backing PFN through the generic
>population helpers.
>
>Remove the Device DAX-specific population path and let section memmap
>population always use vmemmap_populate(). The powerpc retains an
>architecture-specific compound-page implementation, so select it directly
>from radix__vmemmap_populate() for optimizable sections.
>
>Signed-off-by: Muchun Song <songmuchun@bytedance.com>
>Acked-by: Qi Zheng <qi.zheng@linux.dev>
>---
LGTM! Feel free to add:
Reviewed-by: Lance Yang <lance.yang@linux.dev>
next prev parent reply other threads:[~2026-10-01 14:27 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-29 5:32 [PATCH v3 0/6] mm: Unify device DAX and HugeTLB vmemmap population paths Muchun Song
2026-09-29 5:32 ` [PATCH v3 1/6] mm/sparse-vmemmap: drop VMEMMAP_POPULATE_DAX Muchun Song
2026-09-30 4:24 ` Lance Yang
2026-09-29 5:32 ` [PATCH v3 2/6] mm/sparse-vmemmap: support device DAX in common vmemmap path Muchun Song
2026-09-30 8:53 ` Lance Yang
2026-09-30 10:09 ` Muchun Song
2026-09-30 11:11 ` Muchun Song
2026-09-30 13:38 ` Lance Yang
2026-09-30 10:02 ` Lance Yang
2026-09-29 5:32 ` [PATCH v3 3/6] mm/sparse-vmemmap: drop Device DAX-specific population path Muchun Song
2026-10-01 14:27 ` Lance Yang [this message]
2026-09-29 5:32 ` [PATCH v3 4/6] mm/sparse-vmemmap: remove the unused ptpfn argument Muchun Song
2026-10-01 14:52 ` Lance Yang
2026-09-29 5:32 ` [PATCH v3 5/6] mm/sparse-vmemmap: open-code vmemmap_populate_address() Muchun Song
2026-10-01 15:10 ` Lance Yang
2026-09-29 5:32 ` [PATCH v3 6/6] mm/mm_init: add zone mismatch warning during page init Muchun Song
2026-10-01 14:42 ` Mike Rapoport
2026-10-01 16:07 ` Lance Yang
2026-10-02 1:48 ` Muchun Song
2026-10-02 8:22 ` Mike Rapoport
2026-10-02 9:56 ` Muchun Song
2026-10-02 18:12 ` Mike Rapoport
2026-10-05 16:27 ` Muchun Song
2026-10-06 10:52 ` Mike Rapoport
2026-10-06 13:32 ` Muchun Song
2026-10-08 7:45 ` Mike Rapoport
2026-10-08 8:16 ` Muchun Song
2026-10-01 16:09 ` Lance Yang
2026-09-29 21:32 ` [PATCH v3 0/6] mm: Unify device DAX and HugeTLB vmemmap population paths Andrew Morton
2026-09-30 1:26 ` Muchun Song
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