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Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Andrew Morton , Yuan-Hao Hsu Subject: Re: [PATCH v3 5/6] mm: gup: introduce gup_unshared_pages() Message-ID: References: <20261109-refactor_gup_fast-v3-0-2aaef02df0e1@arm.com> <20261109-refactor_gup_fast-v3-5-2aaef02df0e1@arm.com> <7627c0d90188b581e7740bf8d17c8dd07b460f89.camel@surriel.com> <699499e46ace0875fd0f32052399e665c8209ea9.camel@surriel.com> <5db7a358c293393a93984ac3c3cc58e810edd75a.camel@surriel.com> <0ff8276d-9535-449a-94b0-912651411bfe@kernel.org> X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <0ff8276d-9535-449a-94b0-912651411bfe@kernel.org> X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 80DC420003 X-Stat-Signature: az35b75uo3is7ewqajkzwepfxuogw51g X-Rspam-User: X-Spam-Status: No, score=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_PASS,SPF_PASS autolearn=no autolearn_force=no version=4.0.1 X-HE-Tag: 1794350388-254143 X-HE-Meta: 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 0R1T27oY 2F5rgnkPMEdQIkSnWkIu6nGTavBaheDcGOcYQn3rMawOmvWFqW8P61TcCjGU5no8OEbjqxukevz+CxYI1cV+Do1vZfeluDZLJDSmBpmIOmbD4fpKBbfe6QD5/1N7arA5vN+qqJLp/w8Fp1sUrENBhNovm580UdgYMF7wbTl30srH9xPcmez/veoxjMn/A3IdnTTIC9bOhRWDGV1aI+kQeiG1J7Val7qyF9uaXzo6n5lx+lw9RiVaO3MFzfhjq0s8ZC8U9ZicMFRPAD45pGmbP9eRLFHVcqEQGDibg Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 On Tue, Nov 10, 2026 at 11:35:25PM +0100, David Hildenbrand (Arm) wrote: > On 11/10/26 22:27, Yeoreum Yun wrote: > > On Tue, Nov 10, 2026 at 03:23:15PM -0500, Rik van Riel wrote: > >> On Tue, 2026-11-10 at 20:19 +0000, Yeoreum Yun wrote: > >>> > >>> 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? > >> > >> The function measures how many pages in > >> this current interval do not need to be > >> unshared. > >> > >> I'm happy with any name, though. > >> > >> I would really like to just see this > >> code go in, so I can post my two > >> GUP series on top, first the batching > >> for the GUP-slow path, and then the > >> series that allows access_remote_vm() > >> and friends to work under the per-VMA > >> lock. > > > > @David, If you don't have any strong comments for original name > > -- gup_unshared_page(), May I post next version with resolving other > > comments so that Rik's series be posted soon? > > > > Otherewise, gup_skip_unshare_pages() works for me. > > Let me think ... > > Maybe just throw in: > > gup_pages_not_requiring_unshare Agree. though name is long, it would be better to explain anyway. Thanks! -- Sincerely, Yeoreum Yun