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 CDB314E50DF for ; Thu, 17 Sep 2026 21:10:30 +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=1789679432; cv=none; b=lTUYdPn7aPviMt1Rx57NDOYG9KRqMg+9LulmcJ8vlRN3NppnfQPk2G/Q4Mavo24k6nbxi7+YjyX8ulX+MxyP1Ir9TGqF1O+x83MupsCDIU0O5Pd3ChTEgS8xxHQwoXHL+eswd5eMdcm9mgZ3/o2HUIu9ogb3Yp1rrzMc4GnKKAM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789679432; c=relaxed/simple; bh=f8TVpfAwtrM//+glYt3CO5jkwR6mUFTPNlgJGU5QwDI=; h=Date:To:From:Subject:Message-Id; b=q5m0Hd1spbOjsRSCBDPXJJiIxiW7qWWonRy5FMBDqL5GknTo3r1YFy6MxXXxo5nD3RNP6EAD91G8TZCF3ONrV4NFM42pYyl24FIMCSEMPzk+PIzxxqYk+LGI5Ly6HlNcKvhBToJMPuAtDVIp85GPlwYmSq8a0fG6J22MhPko2Yo= 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=Ch5iyr+p; 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="Ch5iyr+p" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9D7981F00893; Thu, 17 Sep 2026 21:10:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1789679430; bh=95pY7EBQYDrjoBNYDdiCMJT7Y+GW+6xQPe1foVnZ4GM=; h=Date:To:From:Subject; b=Ch5iyr+pp4prhHT5XL0mMY4IhMEGKkeRQvfP2ruXqwFdnKabA6Ks118VtGWbwYunj pCAPcBH0Qz08CWBnsoz2XzaBLR2d7M3syz9yk3nSJH0wFRpnNY1OM5B/+oKTQFfi2g VUqdTIb9FfhDZhJPBkiI5prkq23bGvSIqxEugprE= Date: Thu, 17 Sep 2026 14:10:30 -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: <20260917211030.9D7981F00893@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: Mon, 14 Sep 2026 15:57:54 +0100 It is now an invariant that VMA_IO_BIT is not set except by kernel-owned 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 kernel-owned or fixed mapping. Update a number of callsites which already explicitly handle hugetlb mappings. vma_supports_mlock() and ksm_compatible() also explicitly bail on droppable mappings - detecting kernel-owned, fixed or droppable mappings is handled by vma_is_persistent(), so in these cases use this predicate. should_skip_vma() tests for locked, kernel-owned or fixed memory (having already excluded hugetlb mappings) so simply test for those there. No functional change intended. Link: https://lore.kernel.org/20260914-b4-mmap-prepare-vma-flag-sanify-v2-34-7d9781ed5361@kernel.org Signed-off-by: Lorenzo Stoakes (ARM) Signed-off-by: Andrew Morton --- 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 @@ -1111,9 +1111,7 @@ 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_persistent(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_persistent(&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 @@ -3481,7 +3481,8 @@ 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_kernel_owned(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-vmpressure-remove-window-size-todo.patch tools-testing-selftests-mm-add-missing-gitignore-entries.patch mm-move-drivers-char-memc-to-mm-char-memc.patch mm-implement-file_is_dev_zero-to-uniquely-identify-dev-zero.patch mm-vma-only-permit-map_private-dev-zero-to-be-mapped-anonymous.patch mm-vma-make-map_private-mapped-dev-zero-mappings-truly-anonymous.patch tools-testing-vma-add-test-to-assert-map_private-dev-zero-is-anon.patch tools-testing-selftests-mm-add-map_private-dev-zero-merge-tests.patch mm-madvise-swap-in-cowd-map_private-file-mappings-on-madv_willneed.patch mm-huge_memory-zap-deposited-page-tables-after-an-rcu-grace-period.patch mm-enable-mmu_gather_rcu_table_free-for-most-2-level-architectures.patch mm-enable-mmu_gather_rcu_table_free-for-mmu-riscv.patch mm-enable-mmu_gather_rcu_table_free-for-mmu-arm.patch mm-enable-mmu_gather_rcu_table_free-for-arc-microblaze-xtensa.patch mm-enable-mmu_gather_rcu_table_free-for-sparc64.patch mm-enable-mmu_gather_rcu_table_free-for-m68k-coldfire.patch mm-enable-mmu_gather_rcu_table_free-for-sh-x2.patch mm-enable-mmu_gather_rcu_table_free-for-m68k-motorola.patch mm-enable-mmu_gather_rcu_table_free-for-sparc32.patch mm-make-userland-page-table-freeing-rcu-safe.patch mm-change-the-contract-for-free_pgtables-update-docs.patch 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-introduce-and-use-vma_can_gup.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