From: Yeoreum Yun <yeoreum.yun@arm.com>
To: "David Hildenbrand (Arm)" <david@kernel.org>
Cc: Yeoreum Yun <yeoreum.yun@arm.com>,
Rik van Riel <riel@surriel.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Jason Gunthorpe <jgg@ziepe.ca>,
John Hubbard <jhubbard@nvidia.com>, Peter Xu <peterx@redhat.com>,
Lorenzo Stoakes <ljs@kernel.org>,
"Liam R. Howlett" <liam@infradead.org>,
Vlastimil Babka <vbabka@kernel.org>,
Mike Rapoport <rppt@kernel.org>,
Suren Baghdasaryan <surenb@google.com>,
Michal Hocko <mhocko@suse.com>,
Andrew Morton <akpm@linux-foundation.org>,
Yuan-Hao Hsu <aa9736195201@gmail.com>
Subject: Re: [PATCH v3 5/6] mm: gup: introduce gup_unshared_pages()
Date: Tue, 10 Nov 2026 13:58:53 +0000 [thread overview]
Message-ID: <avMjHS81ani_PtQ6@e129823.arm.com> (raw)
In-Reply-To: <aa227fea-d22b-4c0f-bd11-bf9ec36b0767@kernel.org>
On Tue, Nov 10, 2026 at 02:04:43PM +0100, David Hildenbrand (Arm) wrote:
> On 11/10/26 10:58, Yeoreum Yun wrote:
> > Hi Rik,
> >
> >> On Mon, 2026-11-09 at 12:32 +0000, Yeoreum Yun wrote:
> >>> This is preparatory patch to make gup_fast_pte_range() batchable.
> >>>
> >>> Introduce gup_unshared_pages() to count consecutive pages within a
> >>> folio
> >>> that do not require unsharing, and use it to implement
> >>> gup_must_unshare().
> >>>
> >> Could gup_exclusive_pages() be a better name?
> >
> > Yes. This seems much better for me. I'll change it in next-spin.
>
> Not quite the right semantics. For pagecache folios we simply don't need
> unsharing in MAP_SHARED VMAs. That does not imply that these are exclusive.
>
> So it's all about "number of pages that don't need unsharing".
>
> Any idea for a fitting name ? :)
Might gup_pages_without_unshared()..? otherwise I couldn't image
better name than origin...
--
Sincerely,
Yeoreum Yun
next prev parent reply other threads:[~2026-11-10 13:58 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-09 12:32 [PATCH v3 0/6] mm: gup: batch PTE-mapped large folios in gup_fast_pte_range() Yeoreum Yun
2026-11-09 12:32 ` [PATCH v3 1/6] mm: khugepaged: ignore MADV_HUGEPAGE for shadow stacks Yeoreum Yun
2026-11-09 14:22 ` David Hildenbrand (Arm)
2026-11-09 15:24 ` Yeoreum Yun
2026-11-09 12:32 ` [PATCH v3 2/6] mm: gup: clarify a reason to check pte/pmd in gup_fast_pte_range() Yeoreum Yun
2026-11-10 3:50 ` Rik van Riel
2026-11-10 9:52 ` Yeoreum Yun
2026-11-09 12:32 ` [PATCH v3 3/6] mm: gup: move gup_must_unshare() and INTERNAL_GUP_FLAGS to gup.c Yeoreum Yun
2026-11-10 4:49 ` Rik van Riel
2026-11-10 13:02 ` David Hildenbrand (Arm)
2026-11-09 12:32 ` [PATCH v3 4/6] mm: internal: introduce FPB_LOCKLESS for folio_pte_batch_flags() Yeoreum Yun
2026-11-10 4:51 ` Rik van Riel
2026-11-10 13:02 ` David Hildenbrand (Arm)
2026-11-09 12:32 ` [PATCH v3 5/6] mm: gup: introduce gup_unshared_pages() Yeoreum Yun
2026-11-10 5:26 ` Rik van Riel
2026-11-10 9:58 ` Yeoreum Yun
2026-11-10 13:04 ` David Hildenbrand (Arm)
2026-11-10 13:58 ` Yeoreum Yun [this message]
2026-11-09 12:32 ` [PATCH v3 6/6] mm: gup: batch PTE-mapped large folios in gup_fast_pte_range() Yeoreum Yun
2026-11-10 5:46 ` Rik van Riel
2026-11-10 13:09 ` David Hildenbrand (Arm)
2026-11-10 14:04 ` Yeoreum Yun
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