From: Rik van Riel <riel@surriel.com>
To: "David Hildenbrand (Arm)" <david@kernel.org>,
Yeoreum Yun <yeoreum.yun@arm.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 14:21:18 -0500 [thread overview]
Message-ID: <699499e46ace0875fd0f32052399e665c8209ea9.camel@surriel.com> (raw)
In-Reply-To: <aa227fea-d22b-4c0f-bd11-bf9ec36b0767@kernel.org>
On Tue, 2026-11-10 at 14:04 +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".
>
gup_no_unshare_len() ?
a little awkward sounding, but it describes
what it's doing?
--
All Rights Reversed.
next prev parent reply other threads:[~2026-11-10 19:21 UTC|newest]
Thread overview: 26+ 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
2026-11-10 19:21 ` Rik van Riel [this message]
2026-11-10 20:19 ` Yeoreum Yun
2026-11-10 20:23 ` Rik van Riel
2026-11-10 20:23 ` David Hildenbrand (Arm)
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=699499e46ace0875fd0f32052399e665c8209ea9.camel@surriel.com \
--to=riel@surriel.com \
--cc=aa9736195201@gmail.com \
--cc=akpm@linux-foundation.org \
--cc=david@kernel.org \
--cc=jgg@ziepe.ca \
--cc=jhubbard@nvidia.com \
--cc=liam@infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=ljs@kernel.org \
--cc=mhocko@suse.com \
--cc=peterx@redhat.com \
--cc=rppt@kernel.org \
--cc=surenb@google.com \
--cc=vbabka@kernel.org \
--cc=yeoreum.yun@arm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®