From: Matthew Wilcox <willy@infradead.org>
To: Dev Jain <dev.jain@arm.com>
Cc: "Lorenzo Stoakes (Oracle)" <ljs@kernel.org>,
akpm@linux-foundation.org, axelrasmussen@google.com,
yuanchu@google.com, david@kernel.org, hughd@google.com,
chrisl@kernel.org, kasong@tencent.com, weixugc@google.com,
Liam.Howlett@oracle.com, vbabka@kernel.org, rppt@kernel.org,
surenb@google.com, mhocko@suse.com, riel@surriel.com,
harry.yoo@oracle.com, jannh@google.com, pfalcato@suse.de,
baolin.wang@linux.alibaba.com, shikemeng@huaweicloud.com,
nphamcs@gmail.com, bhe@redhat.com, baohua@kernel.org,
youngjun.park@lge.com, ziy@nvidia.com, kas@kernel.org,
yuzhao@google.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, ryan.roberts@arm.com,
anshuman.khandual@arm.com
Subject: Re: [PATCH 6/9] mm/swapfile: Make folio_dup_swap batchable
Date: Thu, 19 Mar 2026 16:47:31 +0000 [thread overview]
Message-ID: <abwoo2aIbRwZDlam@casper.infradead.org> (raw)
In-Reply-To: <26631dbf-1a3e-4d30-9a07-ff64319cbf2f@arm.com>
On Wed, Mar 11, 2026 at 11:12:22AM +0530, Dev Jain wrote:
> On 10/03/26 2:19 pm, Lorenzo Stoakes (Oracle) wrote:
> > On Tue, Mar 10, 2026 at 01:00:10PM +0530, Dev Jain wrote:
> >> Teach folio_dup_swap to handle a batch of consecutive pages. Note that
> >> folio_dup_swap already can handle a subset of this: nr_pages == 1 and
> >> nr_pages == folio_nr_pages(folio). Generalize this to any nr_pages.
> >>
> >> Currently we have a not-so-nice logic of passing in subpage == NULL if
> >> we mean to exercise the logic on the entire folio, and subpage != NULL if
> >> we want to exercise the logic on only that subpage. Remove this
> >> indirection, and explicitly pass subpage != NULL, and the number of
> >> pages required.
> >
> > You've made the interface more confusing? Now we can update multiple subpages
> > but specify only one? :)
For the next version, please lose the "subpage" name. It's just a page.
folios have pages, not subpages.
next prev parent reply other threads:[~2026-03-19 16:48 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-10 7:30 [PATCH 0/9] mm/rmap: Optimize anonymous large folio unmapping Dev Jain
2026-03-10 7:30 ` [PATCH 1/9] mm/rmap: make nr_pages signed in try_to_unmap_one Dev Jain
2026-03-10 7:56 ` Lorenzo Stoakes (Oracle)
2026-03-10 8:06 ` David Hildenbrand (Arm)
2026-03-10 8:23 ` Dev Jain
2026-03-10 12:40 ` Matthew Wilcox
2026-03-11 4:54 ` Dev Jain
2026-03-10 7:30 ` [PATCH 2/9] mm/rmap: initialize nr_pages to 1 at loop start " Dev Jain
2026-03-10 8:10 ` Lorenzo Stoakes (Oracle)
2026-03-10 8:31 ` Dev Jain
2026-03-10 8:39 ` Lorenzo Stoakes (Oracle)
2026-03-10 8:43 ` Dev Jain
2026-03-10 7:30 ` [PATCH 3/9] mm/rmap: refactor lazyfree unmap commit path to commit_ttu_lazyfree_folio() Dev Jain
2026-03-10 8:19 ` Lorenzo Stoakes (Oracle)
2026-03-10 8:42 ` Dev Jain
2026-03-19 15:53 ` Lorenzo Stoakes (Oracle)
2026-03-10 7:30 ` [PATCH 4/9] mm/memory: Batch set uffd-wp markers during zapping Dev Jain
2026-03-10 7:30 ` [PATCH 5/9] mm/rmap: batch unmap folios belonging to uffd-wp VMAs Dev Jain
2026-03-10 8:34 ` Lorenzo Stoakes (Oracle)
2026-03-10 23:32 ` Barry Song
2026-03-11 4:14 ` Barry Song
2026-03-11 4:52 ` Dev Jain
2026-03-11 4:56 ` Dev Jain
2026-03-10 7:30 ` [PATCH 6/9] mm/swapfile: Make folio_dup_swap batchable Dev Jain
2026-03-10 8:27 ` Kairui Song
2026-03-10 8:46 ` Dev Jain
2026-03-10 8:49 ` Lorenzo Stoakes (Oracle)
2026-03-11 5:42 ` Dev Jain
2026-03-19 15:26 ` Lorenzo Stoakes (Oracle)
2026-03-19 16:47 ` Matthew Wilcox [this message]
2026-03-18 0:20 ` kernel test robot
2026-03-10 7:30 ` [PATCH 7/9] mm/swapfile: Make folio_put_swap batchable Dev Jain
2026-03-10 8:29 ` Kairui Song
2026-03-10 8:50 ` Dev Jain
2026-03-10 8:55 ` Lorenzo Stoakes (Oracle)
2026-03-18 1:04 ` kernel test robot
2026-03-10 7:30 ` [PATCH 8/9] mm/rmap: introduce folio_try_share_anon_rmap_ptes Dev Jain
2026-03-10 9:38 ` Lorenzo Stoakes (Oracle)
2026-03-11 8:09 ` Dev Jain
2026-03-12 8:19 ` Wei Yang
2026-03-19 15:47 ` Lorenzo Stoakes (Oracle)
2026-03-10 7:30 ` [PATCH 9/9] mm/rmap: enable batch unmapping of anonymous folios Dev Jain
2026-03-10 8:02 ` [PATCH 0/9] mm/rmap: Optimize anonymous large folio unmapping Lorenzo Stoakes (Oracle)
2026-03-10 9:28 ` Dev Jain
2026-03-10 12:59 ` Lance Yang
2026-03-11 8:11 ` Dev Jain
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