From: Mike Rapoport <rppt@kernel.org>
To: Muchun Song <muchun.song@linux.dev>
Cc: Muchun Song <songmuchun@bytedance.com>,
Andrew Morton <akpm@linux-foundation.org>,
Oscar Salvador <osalvador@suse.de>,
David Hildenbrand <david@kernel.org>,
linux-mm@kvack.org, Vlastimil Babka <vbabka@kernel.org>,
Lorenzo Stoakes <ljs@kernel.org>, Michal Hocko <mhocko@suse.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 04/17] mm/mm_init: skip initializing shared vmemmap tail pages
Date: Wed, 15 Jul 2026 12:47:13 +0300 [thread overview]
Message-ID: <aldXIU5-n-m34OLY@kernel.org> (raw)
In-Reply-To: <D8223E27-2585-429F-8031-49FA69367E3E@linux.dev>
On Wed, Jul 15, 2026 at 05:11:21PM +0800, Muchun Song wrote:
> > On Jul 15, 2026, at 13:08, Mike Rapoport <rppt@kernel.org> wrote:
> >
> >> --- a/mm/internal.h
> >> +++ b/mm/internal.h
> >> @@ -1002,10 +1002,26 @@ static inline void sparse_init(void) {}
> >> */
> >> #ifdef CONFIG_SPARSEMEM_VMEMMAP
> >> void sparse_init_subsection_map(void);
> >> +
> >> +static inline bool page_vmemmap_optimizable(const struct page *page, unsigned int order)
> >> +{
> >> + const unsigned long pfn = page_to_pfn(page);
> >> + const unsigned long nr_pages = 1UL << order;
> >> +
> >
> > Don't you want to gate it on HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON?
>
> You mean HUGETLB_PAGE_OPTIMIZE_VMEMMAP, right? HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON
> could be off when user enable HVO via cmdline.
Yes
--
Sincerely yours,
Mike.
next prev parent reply other threads:[~2026-07-15 9:47 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-02 9:38 [PATCH 00/17] mm: Introduce section-based vmemmap optimization for HugeTLB Muchun Song
2026-07-02 9:38 ` [PATCH 01/17] mm/sparse: drop power-of-2 size requirement for struct mem_section Muchun Song
2026-07-15 5:08 ` Mike Rapoport
2026-07-15 9:34 ` David Laight
2026-07-15 13:15 ` Muchun Song
2026-07-02 9:38 ` [PATCH 02/17] mm/sparse-vmemmap: track compound page order in " Muchun Song
2026-07-15 5:08 ` Mike Rapoport
2026-07-15 6:42 ` Muchun Song
2026-07-15 9:45 ` Mike Rapoport
2026-07-02 9:38 ` [PATCH 03/17] mm/sparse-vmemmap: introduce folio-oriented vmemmap optimization macros Muchun Song
2026-07-15 5:08 ` Mike Rapoport
2026-07-02 9:38 ` [PATCH 04/17] mm/mm_init: skip initializing shared vmemmap tail pages Muchun Song
2026-07-09 10:45 ` Mike Rapoport
2026-07-09 12:31 ` Muchun Song
2026-07-09 13:05 ` Mike Rapoport
2026-07-09 13:23 ` Muchun Song
2026-07-15 5:08 ` Mike Rapoport
2026-07-15 9:11 ` Muchun Song
2026-07-15 9:47 ` Mike Rapoport [this message]
2026-07-02 9:38 ` [PATCH 05/17] mm/sparse-vmemmap: initialize shared tail vmemmap pages on allocation Muchun Song
2026-07-02 9:38 ` [PATCH 06/17] mm/sparse-vmemmap: support section-based vmemmap accounting Muchun Song
2026-07-15 5:08 ` Mike Rapoport
2026-07-15 14:44 ` Muchun Song
2026-07-02 9:38 ` [PATCH 07/17] mm/sparse-vmemmap: support section-based vmemmap optimization Muchun Song
2026-07-15 5:08 ` Mike Rapoport
2026-07-02 9:38 ` [PATCH 08/17] mm/sparse: mark memory sections present earlier Muchun Song
2026-07-09 10:54 ` Mike Rapoport
2026-07-09 12:35 ` Muchun Song
2026-07-15 5:08 ` Mike Rapoport
2026-07-02 9:38 ` [PATCH 09/17] mm/hugetlb: switch HugeTLB to section-based vmemmap optimization Muchun Song
2026-07-15 5:08 ` Mike Rapoport
2026-07-02 9:38 ` [PATCH 10/17] mm/mm_init: factor out pfn_to_zone() Muchun Song
2026-07-15 5:08 ` Mike Rapoport
2026-07-02 9:38 ` [PATCH 11/17] mm/sparse-vmemmap: remove SPARSEMEM_VMEMMAP_PREINIT support Muchun Song
2026-07-15 5:08 ` Mike Rapoport
2026-07-02 9:38 ` [PATCH 12/17] mm/sparse: inline usemap allocation into sparse_init_nid() Muchun Song
2026-07-15 5:08 ` Mike Rapoport
2026-07-02 9:38 ` [PATCH 13/17] mm/sparse: remove section_map_size() Muchun Song
2026-07-15 5:08 ` Mike Rapoport
2026-07-02 9:38 ` [PATCH 14/17] mm/hugetlb: remove HUGE_BOOTMEM_HVO Muchun Song
2026-07-15 5:08 ` Mike Rapoport
2026-07-02 9:38 ` [PATCH 15/17] mm/hugetlb: remove HUGE_BOOTMEM_CMA Muchun Song
2026-07-15 5:08 ` Mike Rapoport
2026-07-02 9:38 ` [PATCH 16/17] mm/hugetlb: localize struct huge_bootmem_page Muchun Song
2026-07-15 5:08 ` Mike Rapoport
2026-07-02 9:38 ` [PATCH 17/17] mm/hugetlb: localize HUGE_BOOTMEM_ZONES_VALID Muchun Song
2026-07-15 5:08 ` Mike Rapoport
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