From: Andrew Morton <akpm@linux-foundation.org>
To: kasong@tencent.com
Cc: Kairui Song via B4 Relay <devnull+kasong.tencent.com@kernel.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
David Hildenbrand <david@kernel.org>,
Lorenzo Stoakes <ljs@kernel.org>, Zi Yan <ziy@nvidia.com>,
Baolin Wang <baolin.wang@linux.alibaba.com>,
"Liam R. Howlett" <liam@infradead.org>,
Nico Pache <nico.pache@linux.dev>,
Ryan Roberts <ryan.roberts@arm.com>, Dev Jain <dev.jain@arm.com>,
Lance Yang <lance.yang@linux.dev>,
Usama Arif <usama.arif@linux.dev>,
Vlastimil Babka <vbabka@kernel.org>,
Mike Rapoport <rppt@kernel.org>,
Suren Baghdasaryan <surenb@google.com>,
Michal Hocko <mhocko@suse.com>, Chris Li <chrisl@kernel.org>,
Kemeng Shi <shikemeng@huaweicloud.com>,
Nhat Pham <nphamcs@gmail.com>, Baoquan He <baoquan.he@linux.dev>,
Barry Song <baohua@kernel.org>,
Youngjun Park <youngjun.park@lge.com>,
Yeoreum Yun <yeoreum.yun@arm.com>,
"Kiryl Shutsemau (Meta)" <kas@kernel.org>,
Shivam Kalra <shivamkalra98@zohomail.in>,
Kairui Song <ryncsn@gmail.com>
Subject: Re: [PATCH v5 00/17] mm/huge_memory: clean up and decouple the anon and file split helpers
Date: Mon, 14 Sep 2026 17:45:33 -0700 [thread overview]
Message-ID: <20260914174533.6b5dba602fb66209a700df09@linux-foundation.org> (raw)
In-Reply-To: <20260915-swap-thp-cleanup-v5-0-39878b37dfb0@tencent.com>
On Tue, 15 Sep 2026 01:14:41 +0800 Kairui Song via B4 Relay <devnull+kasong.tencent.com@kernel.org> wrote:
> The folio split path handles anon, page cache and swap cache folios in
> one routine. That mixing is what makes the swap cache split
> restrictions hard to lift and to review. We now support uniform split to
> order-0 only, and no mappingless swap cache folios. And it has left a fair
> number of dead or redundant checks behind.
>
> This series prepares for lifting those restrictions by cleaning up the
> code first: split the routine into an anon and a file helper, and keep
> all swap cache handling in the anon helper. The file helper never sees
> a swap cache folio, folio_check_splittable() rejects them up front.
>
> Apart from two bug fixes (patch 1 and 2) and a slight adjustment of anon
> splitting (patch 12), this is a pure cleanup.
Thanks, all queued up in mm.git's mm-new branch.
prev parent reply other threads:[~2026-09-15 0:45 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-14 17:14 Kairui Song via B4 Relay
2026-09-14 17:14 ` [PATCH v5 01/17] mm/swap: fix off-by-one in swap cache replace sanity check Kairui Song via B4 Relay
2026-09-14 17:14 ` [PATCH v5 02/17] mm/huge_memory: fix rejection of swap cache folios with a mapping Kairui Song via B4 Relay
2026-09-14 17:14 ` [PATCH v5 03/17] mm/huge_memory: invert folio_ref_freeze() check to reduce indentation Kairui Song via B4 Relay
2026-09-14 17:14 ` [PATCH v5 04/17] mm/huge_memory: split the routine for splitting anon and file folio Kairui Song via B4 Relay
2026-09-14 17:14 ` [PATCH v5 05/17] mm/huge_memory: rename __split_unmapped_folio() to __split_frozen_folio() Kairui Song via B4 Relay
2026-09-14 17:14 ` [PATCH v5 06/17] mm/huge_memory: consolidate irq and locking for folio split Kairui Song via B4 Relay
2026-09-14 17:14 ` [PATCH v5 07/17] mm/huge_memory: move EOF trimming into the file split helper Kairui Song via B4 Relay
2026-09-14 17:14 ` [PATCH v5 08/17] mm/huge_memory: move unmap and remap into the split helpers Kairui Song via B4 Relay
2026-09-14 17:14 ` [PATCH v5 09/17] mm/huge_memory: rename remap_page() to remap_anon_folio() Kairui Song via B4 Relay
2026-09-14 17:28 ` Yeoreum Yun
2026-09-14 17:14 ` [PATCH v5 10/17] mm/huge_memory: move the racy refcount check into unmap_folio() Kairui Song via B4 Relay
2026-09-14 17:29 ` Yeoreum Yun
2026-09-14 17:14 ` [PATCH v5 11/17] mm/huge_memory: move filemap management into the file split helper Kairui Song via B4 Relay
2026-09-14 17:30 ` Yeoreum Yun
2026-09-14 17:14 ` [PATCH v5 12/17] mm/huge_memory: move anon_vma handling into the anon " Kairui Song via B4 Relay
2026-09-14 17:27 ` Yeoreum Yun
2026-09-14 17:14 ` [PATCH v5 13/17] mm/huge_memory: move memcg switch into the file " Kairui Song via B4 Relay
2026-09-14 17:14 ` [PATCH v5 14/17] mm/huge_memory: drop the unused do_lru argument of " Kairui Song via B4 Relay
2026-09-14 17:14 ` [PATCH v5 15/17] mm/huge_memory: clean up after-split folio freeing in __folio_split Kairui Song via B4 Relay
2026-09-14 17:14 ` [PATCH v5 16/17] mm/huge_memory: count only swap cache refs in anon folio split Kairui Song via B4 Relay
2026-09-14 17:14 ` [PATCH v5 17/17] mm/huge_memory: drop the redundant mapping argument of __split_frozen_folio Kairui Song via B4 Relay
2026-09-15 0:45 ` Andrew Morton [this message]
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