From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0AFB0471CEC for ; Wed, 23 Sep 2026 22:32:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790202777; cv=none; b=Hkdlg37LDqaCqHW8GS2CQ2lh8ehBpslCj0arryFokIA2yZRY/Z4S0BRkTUSBimyZ8Df/rVpBZ0NXCMr81RDtwcSnjg5IUpyElgutbZYLmIXhW5T9QubHnKUcyIuOzdlV1xSZ+sihf0roiVMNUKPBX2PbC//HdEHOGG34z6mEEbo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790202777; c=relaxed/simple; bh=s9iL/C7oqumM/rakWrOUF1jF3BW+XugKmly8g8lexpI=; h=Date:To:From:Subject:Message-Id; b=Wl4gp95LZ1vS7yOTZ3RgDSigTKjulkjrYibOzQEUFk6eKuR9+oKcFMHQhRb2E+Gt99BG6sQG44ctdhsKV2/RhqXTsqfdVXiuOgOJk77voab2C0M51taj68goTbTtKAIm77Av00lRVqOQo3mMb/QjE6TnjAy3T4x3TSgkb/3FPvM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=xYFq1Sfk; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="xYFq1Sfk" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D467A1F00893; Wed, 23 Sep 2026 22:32:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1790202775; bh=e3DjkAL7QYdErv0sBRKV/rYA+KG/vr1WEd9epxzlqEk=; h=Date:To:From:Subject; b=xYFq1SfkyRWMMm/49C66E+mwFIOvpoMbOC4jGMxphYFMpqh45yn6AhRs2zZ0r8yLa Un5MnQkmbjIRzHGX0j0zBVjq6Szr0+HuBEkZKY0A/7ua3xDPc4lgZTAMDf4myNNHQq zneSGGMabDvJ5oGl6JWt/h4KjLXAX5EjuFsZc7F8= Date: Wed, 23 Sep 2026 15:32:55 -0700 To: mm-commits@vger.kernel.org,kasong@tencent.com,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-huge_memory-drop-the-redundant-mapping-argument-of-__split_frozen_folio.patch added to mm-unstable branch Message-Id: <20260923223255.D467A1F00893@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: mm/huge_memory: drop the redundant mapping argument of __split_frozen_folio has been added to the -mm mm-unstable branch. Its filename is mm-huge_memory-drop-the-redundant-mapping-argument-of-__split_frozen_folio.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-huge_memory-drop-the-redundant-mapping-argument-of-__split_frozen_folio.patch This patch will later appear in the mm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via various branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there most days ------------------------------------------------------ From: Kairui Song Subject: mm/huge_memory: drop the redundant mapping argument of __split_frozen_folio Date: Wed, 23 Sep 2026 23:32:48 +0200 The mapping parameter only served as a non-NULL check to detect whether page cache entries need updating. The xa_state pointer conveys exactly the same information: the anon split helper passes NULL and the file split helper passes &xas, which is non-NULL iff the folio is in the page cache. Use the xas pointer instead and drop the parameter, along with its kerneldoc entry. Link: https://lore.kernel.org/20260923-swap-thp-cleanup-v6-17-ba1b4ba72c6f@tencent.com Signed-off-by: Kairui Song Signed-off-by: Andrew Morton Reviewed-by: Zi Yan Reviewed-by: Yeoreum Yun Reviewed-by: Kiryl Shutsemau (Meta) Acked-by: David Hildenbrand (Arm) Cc: Lorenzo Stoakes Cc: Baolin Wang Cc: Liam R. Howlett Cc: Nico Pache Cc: Ryan Roberts Cc: Dev Jain Cc: Lance Yang Cc: Usama Arif Cc: Vlastimil Babka Cc: Mike Rapoport Cc: Suren Baghdasaryan Cc: Michal Hocko Cc: Chris Li Cc: Kemeng Shi Cc: Nhat Pham Cc: Baoquan He Cc: Barry Song Cc: Youngjun Park Cc: Shivam Kalra Cc: Kairui Song --- mm/huge_memory.c | 11 ++++------- 1 file changed, 4 insertions(+), 7 deletions(-) --- a/mm/huge_memory.c~mm-huge_memory-drop-the-redundant-mapping-argument-of-__split_frozen_folio +++ a/mm/huge_memory.c @@ -3833,7 +3833,6 @@ static void __split_folio_to_order(struc * @split_at: in buddy allocator like split, the folio containing @split_at * will be split until its order becomes @new_order. * @xas: xa_state pointing to folio->mapping->i_pages and locked by caller - * @mapping: @folio->mapping * @split_type: if the split is uniform or not (buddy allocator like split) * * @@ -3866,7 +3865,7 @@ static void __split_folio_to_order(struc */ static int __split_frozen_folio(struct folio *folio, int new_order, struct page *split_at, struct xa_state *xas, - struct address_space *mapping, enum split_type split_type) + enum split_type split_type) { const bool is_anon = folio_test_anon(folio); int old_order = folio_order(folio); @@ -3890,7 +3889,7 @@ static int __split_frozen_folio(struct f if (is_anon && split_order == 1) continue; - if (mapping) { + if (xas) { /* * uniform split has xas_split_alloc() called before * irq is disabled to allocate enough memory, whereas @@ -4089,8 +4088,7 @@ static int __folio_freeze_split_anon(str if (do_lru) lruvec = folio_lruvec_lock(folio); - ret = __split_frozen_folio(folio, new_order, split_at, NULL, - NULL, split_type); + ret = __split_frozen_folio(folio, new_order, split_at, NULL, split_type); /* * Unfreeze the after-split folios and put them back to the right @@ -4226,8 +4224,7 @@ static int __folio_freeze_split_file(str /* lock lru list/PageCompound, ref frozen by page_ref_freeze */ lruvec = folio_lruvec_lock(folio); - ret = __split_frozen_folio(folio, new_order, split_at, &xas, - mapping, split_type); + ret = __split_frozen_folio(folio, new_order, split_at, &xas, split_type); /* * Unfreeze after-split folios and put them back to the right _ Patches currently in -mm which might be from kasong@tencent.com are mm-memcontrol-move-the-lru_zone_size-sanity-check-to-the-reader-side.patch mm-mglru-introduce-helpers-for-manipulating-gen-and-refs-flags.patch mm-migrate-copy-all-referenced-state-via-folio_migrate_lru_refs.patch mm-mglru-move-max_seq-read-into-walk_update_folio.patch mm-mglru-use-explicit-tier-range-in-read_ctrl_pos.patch mm-mglru-fix-potential-generation-folio-number-leak.patch mm-swap-fix-off-by-one-in-swap-cache-replace-sanity-check.patch mm-huge_memory-fix-rejection-of-swap-cache-folios-with-a-mapping.patch mm-huge_memory-invert-folio_ref_freeze-check-to-reduce-indentation.patch mm-huge_memory-split-the-routine-for-splitting-anon-and-file-folio.patch mm-huge_memory-rename-__split_unmapped_folio-to-__split_frozen_folio.patch mm-huge_memory-consolidate-irq-and-locking-for-folio-split.patch mm-huge_memory-move-eof-trimming-into-the-file-split-helper.patch mm-huge_memory-move-unmap-and-remap-into-the-split-helpers.patch mm-huge_memory-rename-remap_page-to-remap_anon_folio.patch mm-huge_memory-move-the-racy-refcount-check-into-unmap_folio.patch mm-huge_memory-move-filemap-management-into-the-file-split-helper.patch mm-huge_memory-move-anon_vma-handling-into-the-anon-split-helper.patch mm-huge_memory-move-memcg-switch-into-the-file-split-helper.patch mm-huge_memory-drop-the-unused-do_lru-argument-of-the-file-split-helper.patch mm-huge_memory-clean-up-after-split-folio-freeing-in-__folio_split.patch mm-huge_memory-count-only-swap-cache-refs-in-anon-folio-split.patch mm-huge_memory-drop-the-redundant-mapping-argument-of-__split_frozen_folio.patch