From: "David Hildenbrand (Arm)" <david@kernel.org>
To: Yeoreum Yun <yeoreum.yun@arm.com>, Rik van Riel <riel@surriel.com>
Cc: 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 21:23:23 +0100 [thread overview]
Message-ID: <c6348c03-294d-463a-9601-3475ce20469b@kernel.org> (raw)
In-Reply-To: <avN8WISVUF7u4bXl@e129823.arm.com>
On 11/10/26 21:19, Yeoreum Yun wrote:
> On Tue, Nov 10, 2026 at 02:21:18PM -0500, Rik van Riel wrote:
>> On Tue, 2026-11-10 at 14:04 +0100, David Hildenbrand (Arm) wrote:
>>>
>>> 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".
>>>
>> gup_no_unshare_len() ?
>>
>> a little awkward sounding, but it describes
>> what it's doing?
>
> Hmm, Wouldn't this name be semantically much the same as keeping
> the existing gup_unshared_page(), since both essentially convey that
> no unsharing is required from GUP's perspective?
>
> Anyway, naming is always NP-hard problem :\
>
>
gup_skip_unshare_pages
not sure
--
Cheers,
David
next prev parent reply other threads:[~2026-11-10 20:23 UTC|newest]
Thread overview: 34+ 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
2026-11-10 13:01 ` David Hildenbrand (Arm)
2026-11-10 12:33 ` sashiko-bot
2026-11-10 13:00 ` David Hildenbrand (Arm)
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
2026-11-10 19:21 ` Rik van Riel
2026-11-10 20:19 ` Yeoreum Yun
2026-11-10 20:23 ` Rik van Riel
2026-11-10 21:27 ` Yeoreum Yun
2026-11-10 22:35 ` David Hildenbrand (Arm)
2026-11-10 22:39 ` Yeoreum Yun
2026-11-10 20:23 ` David Hildenbrand (Arm) [this message]
2026-11-10 13:06 ` David Hildenbrand (Arm)
2026-11-11 15:03 ` Rik van Riel
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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