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 C2C9536E46C for ; Sat, 10 Oct 2026 21:40:05 +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=1791668409; cv=none; b=fVcERxaQbWqiAbiRhIztAUWjkoCqR0hvaYkxawN5P4Asv7G/D4pVdCp2TMI0NhFhYqPFS09/2Uhd2FCVljOm50zzICltRHqT7vxKdsOVccmMw8JTVMWxyEwK/ereey6Q0NlD3nQkdySg7tst58zKB8jPNncebGEpr1SoIbQ4JdA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791668409; c=relaxed/simple; bh=hF9pRvq41LTwk5bz2zeJccwOVyOhjoG6pAfdEmvXR9Y=; h=Date:To:From:Subject:Message-Id; b=Za0h7VsktoqgPfYfmL/cWCLk2mX5jTy1ABNaRG9OSuaVdBGT9q4pC1c/O11WM/R/+cB2QcumFfyAPQvoAowH94mTubeLL33jjkb+jiZTo8uuS9++EcYw3RUpgk7a0cpVmdEt5UszsKRBOwdpYWv1PO4CBbtefsbCBIO2m10lHSQ= 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=sdK+9b3q; 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="sdK+9b3q" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 93B781F00893; Sat, 10 Oct 2026 21:40:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1791668405; bh=48Hp1vQaD8m5Z26Z71WhYM6dobUSVTP+XGY4SasXClc=; h=Date:To:From:Subject; b=sdK+9b3qcvTs8Jdmi3fW2jM3xC128k/EnjqVfkue1OknsVWKfBZW/diqDEBgTW9oy oQ/DqRssjR5BfEo/F0MrBkiyT+WqYdWwmjvrTapz9dkZPETlAPzPQWac+f60q/rCX3 ssw2FI6fBxYJL+KEmQe86AEK97Wc7BA80YmU5LGw= Date: Sat, 10 Oct 2026 14:40:05 -0700 To: mm-commits@vger.kernel.org,ljs@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: [to-be-updated] mm-eliminate-vma_special_flags-usage-when-hugetlb-explicitly-tested.patch removed from -mm tree Message-Id: <20261010214005.93B781F00893@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: mm: eliminate VMA_SPECIAL_FLAGS usage when hugetlb explicitly tested has been removed from the -mm tree. Its filename was mm-eliminate-vma_special_flags-usage-when-hugetlb-explicitly-tested.patch This patch was dropped because an updated version will be issued ------------------------------------------------------ From: "Lorenzo Stoakes (ARM)" Subject: mm: eliminate VMA_SPECIAL_FLAGS usage when hugetlb explicitly tested Date: Sat, 03 Oct 2026 17:33:04 +0100 It is now an invariant that VMA_IO_BIT is not set by mm-managed mappings, so each existing VMA_SPECIAL_FLAGS test need only test for VMA_DONTEXPAND_BIT, VMA_PFNMAP_BIT and VMA_MIXEDMAP_BIT. This is precisely a test for a fixed or non-mm-managed mapping. Update a number of callsites which already explicitly handle hugetlb mappings. vma_supports_mlock() and ksm_compatible() also explicitly bail on droppable mappings - excluding non-mm-managed, fixed or droppable mappings is exactly what vma_is_mm_backed() tests for, so in these cases use this predicate. should_skip_vma() tests for locked, fixed or non-mm-managed memory (having already excluded hugetlb mappings) so simply test for those there. No functional change intended. Link: https://lore.kernel.org/20261003-b4-mmap-prepare-vma-flag-sanify-v4-33-a1f052500fd7@kernel.org Signed-off-by: Lorenzo Stoakes (ARM) Signed-off-by: Andrew Morton Reviewed-by: Zi Yan Cc: Liam R. Howlett Cc: Vlastimil Babka Cc: Jann Horn Cc: Pedro Falcato Cc: David Hildenbrand Cc: Mike Rapoport Cc: Suren Baghdasaryan Cc: Michal Hocko Cc: Jonathan Corbet Cc: Greg Kroah-Hartman Cc: Dennis Dalessandro Cc: Jason Gunthorpe Cc: Leon Romanovsky Cc: Paul Moore Cc: Stephen Smalley Cc: Jaroslav Kysela Cc: Takashi Iwai Cc: Alexei Starovoitov Cc: Daniel Borkmann Cc: Andrii Nakryiko Cc: Eduard Zingerman Cc: Kumar Kartikeya Dwivedi Cc: Baolin Wang Cc: Nico Pache Cc: Ryan Roberts Cc: Dev Jain Cc: Barry Song Cc: Lance Yang Cc: Usama Arif Cc: Kiryl Shutsemau Cc: Doug Gilbert Cc: James Bottomley Cc: Martin K. Petersen Cc: Simona Vetter Cc: Helge Deller Cc: Sebastian Reichel Cc: John Hubbard Cc: Peter Xu Cc: Masami Hiramatsu Cc: Oleg Nesterov Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: Dave Hansen Cc: Arnaldo Carvalho de Melo Cc: Namhyung Kim Cc: Mark Rutland Cc: Rik van Riel Cc: Harry Yoo Cc: Juri Lelli Cc: Vincent Guittot Cc: Maarten Lankhorst Cc: Maxime Ripard Cc: Thomas Zimmermann Cc: David Airlie Cc: Will Deacon Cc: Aneesh Kumar K.V Cc: Nicholas Piggin Cc: Arnd Bergmann Cc: Muchun Song Cc: Oscar Salvador Cc: Matthew Wilcox (Oracle) Cc: Jan Kara Cc: Marc Zyngier Cc: Oliver Upton Cc: Catalin Marinas Cc: Madhavan Srinivasan Cc: Anup Patel Cc: Paul Walmsley Cc: Palmer Dabbelt Cc: Albert Ou Cc: Christian Borntraeger Cc: Janosch Frank Cc: Claudio Imbrenda Cc: Alexander Gordeev Cc: Gerald Schaefer Cc: Heiko Carstens Cc: Vasily Gorbik Cc: David S. Miller Cc: Andreas Larsson Cc: Al Viro Cc: Christian Brauner Cc: Matthew Brost Cc: Joshua Hahn Cc: Rakie Kim Cc: Byungchul Park Cc: Gregory Price Cc: Ying Huang Cc: Alistair Popple Cc: Chris Li Cc: Kairui Song Cc: Kemeng Shi Cc: Nhat Pham Cc: Baoquan He Cc: Youngjun Park Cc: Johannes Weiner Cc: Qi Zheng Cc: Shakeel Butt Cc: Axel Rasmussen Cc: Yuanchu Xie Cc: Wei Xu Cc: Chengming Zhou Cc: Michal Hocko Cc: Miklos Szeredi Cc: Xu Xin --- mm/internal.h | 4 +--- mm/ksm.c | 4 +--- mm/vmscan.c | 3 ++- 3 files changed, 4 insertions(+), 7 deletions(-) --- a/mm/internal.h~mm-eliminate-vma_special_flags-usage-when-hugetlb-explicitly-tested +++ a/mm/internal.h @@ -1112,9 +1112,7 @@ static inline struct file *maybe_unlock_ static inline bool vma_supports_mlock(const struct vm_area_struct *vma) { - if (vma_test_any_mask(vma, VMA_SPECIAL_FLAGS)) - return false; - if (vma_test_single_mask(vma, VMA_DROPPABLE)) + if (!vma_is_mm_backed(vma)) return false; if (vma_is_dax(vma) || vma_is_hugetlb(vma)) return false; --- a/mm/ksm.c~mm-eliminate-vma_special_flags-usage-when-hugetlb-explicitly-tested +++ a/mm/ksm.c @@ -747,9 +747,7 @@ static bool ksm_compatible(const struct if (vma_flags_test_any(&vma_flags, VMA_SHARED_BIT, VMA_MAYSHARE_BIT, VMA_HUGETLB_BIT)) return false; - if (vma_flags_test_single_mask(&vma_flags, VMA_DROPPABLE)) - return false; - if (vma_flags_test_any_mask(&vma_flags, VMA_SPECIAL_FLAGS)) + if (!vma_flags_is_mm_backed(&vma_flags)) return false; if (file_is_dax(file)) return false; --- a/mm/vmscan.c~mm-eliminate-vma_special_flags-usage-when-hugetlb-explicitly-tested +++ a/mm/vmscan.c @@ -3521,7 +3521,8 @@ static int should_skip_vma(unsigned long if (!vma_has_recency(vma)) return true; - if (vma->vm_flags & (VM_LOCKED | VM_SPECIAL)) + if (vma_test(vma, VMA_LOCKED_BIT) || !vma_is_mm_managed(vma) || + vma_is_fixed_mapping(vma)) return true; if (vma == get_gate_vma(vma->vm_mm)) _ Patches currently in -mm which might be from ljs@kernel.org are mm-eliminate-vma_special_flags-check-in-lru_gen_look_around.patch mm-avoid-use-of-vma_special_flags-in-migrate_vma_setup.patch mm-eliminate-vm_special-vma_special_flags.patch fuse-dax-do-not-set-vm_mixedmap.patch mm-huge_memory-remove-vma_is_special_huge.patch mm-vma-const-ify-vma_assert_stabilised-and-associated-functions.patch mm-implement-and-use-vma_has_anon_rmap-silence-kcsan.patch mm-update-comments-to-refer-to-anon-rmap-rather-than-anon_vma.patch mm-vma-dont-remove-vma-from-rmap-if-pgoff-unchanged.patch