From: Lance Yang <lance.yang@linux.dev>
To: songmuchun@bytedance.com
Cc: akpm@linux-foundation.org, david@kernel.org, osalvador@suse.de,
maddy@linux.ibm.com, corbet@lwn.net, muchun.song@linux.dev,
lance.yang@linux.dev, ljs@kernel.org, liam@infradead.org,
vbabka@kernel.org, rppt@kernel.org, surenb@google.com,
mhocko@suse.com, mpe@ellerman.id.au, npiggin@gmail.com,
chleroy@kernel.org, ritesh.list@gmail.com, sshegde@linux.ibm.com,
skhan@linuxfoundation.org, rdunlap@infradead.org,
qi.zheng@linux.dev, linux-mm@kvack.org,
linuxppc-dev@lists.ozlabs.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 3/4] mm/hugetlb_vmemmap: remove vmemmap_wrprotect_hvo()
Date: Wed, 21 Oct 2026 14:07:56 +0800 [thread overview]
Message-ID: <20261021060756.4599-1-lance.yang@linux.dev> (raw)
In-Reply-To: <20261019090830.1917657-4-songmuchun@bytedance.com>
On Mon, Oct 19, 2026 at 05:08:29PM +0800, Muchun Song wrote:
>Shared vmemmap tail pages are now mapped read-only during initial
>population, so already optimized HugeTLB bootmem folios no longer need a
>separate write-protection pass.
>
>Remove vmemmap_wrprotect_hvo() and skip these folios during boot-time
>optimization.
>
>Signed-off-by: Muchun Song <songmuchun@bytedance.com>
>---
Yep, already read-only, so there's no need to write-protect them again.
LGTM, so
Reviewed-by: Lance Yang <lance.yang@linux.dev>
next prev parent reply other threads:[~2026-10-21 6:08 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-19 9:08 [PATCH 0/4] mm: Enforce read-only shared vmemmap tail mappings Muchun Song
2026-10-19 9:08 ` [PATCH 1/4] mm/sparse-vmemmap: map shared vmemmap tail pages as read-only Muchun Song
2026-10-21 4:57 ` Lance Yang
2026-10-21 5:36 ` Muchun Song
2026-10-19 9:08 ` [PATCH 2/4] powerpc/mm: " Muchun Song
2026-10-21 5:40 ` Lance Yang
2026-10-19 9:08 ` [PATCH 3/4] mm/hugetlb_vmemmap: remove vmemmap_wrprotect_hvo() Muchun Song
2026-10-21 6:07 ` Lance Yang [this message]
2026-10-19 9:08 ` [PATCH 4/4] mm/hugetlb_vmemmap: remove hugetlb_vmemmap_optimize_bootmem_folios() Muchun Song
2026-10-21 6:18 ` Lance Yang
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