From: sashiko-bot@kernel.org
To: "Muchun Song" <songmuchun@bytedance.com>
Cc: linux-s390@vger.kernel.org, "Heiko Carstens" <hca@linux.ibm.com>,
"Vasily Gorbik" <gor@linux.ibm.com>,
"Alexander Gordeev" <agordeev@linux.ibm.com>,
"Christian Borntraeger" <borntraeger@linux.ibm.com>
Subject: Re: [PATCH 2/4] powerpc/mm: drop powerpc vmemmap_can_optimize()
Date: Sat, 31 Oct 2026 00:54:32 +0000 [thread overview]
Message-ID: <sashiko-outbox-191686@kernel.org> (raw)
In-Reply-To: <20261030140720.1256062-3-songmuchun@bytedance.com>
> PowerPC no longer needs an architecture-specific vmemmap_can_optimize()
> override for DAX vmemmap optimization.
>
> Whether the optimized mapping can be used is now decided in the
> architecture-specific vmemmap_populate() path. When PowerPC has to fall
> back, such as on Hash MMU, it can simply clear the section compound order
> there and disable the optimization for that section.
>
> Drop the radix-specific vmemmap_can_optimize() override and rely on the
> generic checks instead.
>
> Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261030140720.1256062-1-songmuchun@bytedance.com?part=2
next prev parent reply other threads:[~2026-10-31 0:54 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-30 14:07 [PATCH 0/4] mm: Simplify device DAX vmemmap optimization plumbing Muchun Song
2026-10-30 14:07 ` Muchun Song
2026-10-30 14:07 ` [PATCH 1/4] powerpc/mm: make vmemmap_populate_compound_pages() static Muchun Song
2026-10-30 14:07 ` Muchun Song
2026-10-31 0:54 ` sashiko-bot
2026-10-30 14:07 ` [PATCH 2/4] powerpc/mm: drop powerpc vmemmap_can_optimize() Muchun Song
2026-10-30 14:07 ` Muchun Song
2026-10-31 0:54 ` sashiko-bot [this message]
2026-10-30 14:07 ` [PATCH 3/4] mm/sparse-vmemmap: drop vmemmap_can_optimize() Muchun Song
2026-10-30 14:07 ` Muchun Song
2026-10-31 0:54 ` sashiko-bot
2026-10-31 2:42 ` Muchun Song
2026-10-30 14:07 ` [PATCH 4/4] mm/sparse-vmemmap: drop @pgmap from vmemmap population APIs Muchun Song
2026-10-30 14:07 ` Muchun Song
2026-10-31 0:54 ` sashiko-bot
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