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 14E303859E0 for ; Sat, 10 Oct 2026 21:39:34 +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=1791668379; cv=none; b=Es39hFrInzmu4c8HvWRiQZzhOLAls/WzUyh+N6dMiNwf6Uex0LAYWGB3vn+Hodu5lUw+VonWFCdCZYjl0hQBKUqMnQHntzjl7VjTvrKVR7huBDYAVbgH+NpA6CkdT2vljxGIygyvdOe+zxW5pWTxSKuN0KX2ZE9Lh29vbe0r62I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791668379; c=relaxed/simple; bh=Tfr2IROa17RgnxL7v2qlhCmwoVcEp7apO51RS3PzvVY=; h=Date:To:From:Subject:Message-Id; b=XYVElYYygLPL9ez+ZPUGH62/Hx7Q3038WnXsylZkIV0wW0r5PzFWBI/d1JAOVGFaTVA2dJG6vX4aBkz48GBd0hPJ/rkEUKcePSWwuTryd/QRJjHiArwV7GQYFzzPnabGJ6zbjfBPAve3EKRs0LXIFPpQpY6XFsWOEQ4mTEwk9jQ= 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=YjiBiaNE; 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="YjiBiaNE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DDB0F1F000FF; Sat, 10 Oct 2026 21:39:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1791668374; bh=6wLq98HKTvHrjRldPwop4Pc/PbLLj6iEC9aME6r3J0w=; h=Date:To:From:Subject; b=YjiBiaNEpY+IhQAxlyzTw07cfogC2nDuEVF4yERjBb5uizEkIMDT4jTzUtZfTmma+ n0EB8Fk7+2xUFUf+m36a1RnhiGuDixPFhvoGFpxfP6p0ADs32oclU3tM89yks3Ra2m kd8dR/AHmmGBHnhDutsT+dleRROWnDNoAAh50lxg= Date: Sat, 10 Oct 2026 14:39:33 -0700 To: mm-commits@vger.kernel.org,ljs@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: [to-be-updated] bpf-arena-mark-arena_map_mmap-mappings-vm_mixedmap.patch removed from -mm tree Message-Id: <20261010213933.DDB0F1F000FF@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: bpf: arena: mark arena_map_mmap() mappings VM_MIXEDMAP has been removed from the -mm tree. Its filename was bpf-arena-mark-arena_map_mmap-mappings-vm_mixedmap.patch This patch was dropped because an updated version will be issued ------------------------------------------------------ From: "Lorenzo Stoakes (ARM)" Subject: bpf: arena: mark arena_map_mmap() mappings VM_MIXEDMAP Date: Sat, 03 Oct 2026 17:32:44 +0100 The bpf_map->ops->map_mmap callback invoked by bpf_map_mmap() can be set to one of ringbuf_map_mmap_kern(), ringbuf_map_mmap_user(), array_map_mmap() or arena_map_mmap(). It is convention in mm to mark mappings whose pages the kernel manages itself with VM_MIXEDMAP, so core mm knows not to treat them as ordinary page cache or anonymous memory. The map_mmap callbacks ringbuf_map_mmap_kern() and ringbuf_map_mmap_user() use remap_vmalloc_range(), which ultimately invokes vm_insert_page() and so marks the ranges VM_MIXEDMAP, and array_map_mmap() sets VM_MIXEDMAP explicitly. However, the exception to this is arena_map_mmap(), which doesn't set the flag. This patch corrects this and updates the comment to reflect it. The pages are refcounted and vm_normal_page() finds them regardless of the flag, and VM_DONTEXPAND remains set (marking the memory as VM_SPECIAL and thus unmergeable). The one effect is that NUMA balancing now skips these VMAs, as it already does for the other bpf map mappings, which is the reason array_map_mmap() gives for setting the flag. The intent of this patch is to be able to establish the invariant that only PFN-mapped or mixed map ranges may clear the VM_MAYWRITE flag, as is done in bpf_map_mmap(). Link: https://lore.kernel.org/20261003-b4-mmap-prepare-vma-flag-sanify-v4-13-a1f052500fd7@kernel.org Signed-off-by: Lorenzo Stoakes (ARM) Signed-off-by: Andrew Morton Reviewed-by: Emil Tsalapatis Reviewed-by: Suren Baghdasaryan Cc: Liam R. Howlett Cc: Vlastimil Babka Cc: Jann Horn Cc: Pedro Falcato Cc: David Hildenbrand Cc: Mike Rapoport 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: Zi Yan 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 --- kernel/bpf/arena.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/kernel/bpf/arena.c~bpf-arena-mark-arena_map_mmap-mappings-vm_mixedmap +++ a/kernel/bpf/arena.c @@ -620,8 +620,9 @@ static int arena_map_mmap(struct bpf_map * clears VM_MAYEXEC. Set VM_DONTEXPAND to avoid potential change * of user_vm_start. Set VM_DONTCOPY to prevent arena VMA from * being copied into the child process on fork. + * This is a kernel page so set VM_MIXEDMAP. */ - vm_flags_set(vma, VM_DONTEXPAND | VM_DONTCOPY); + vm_flags_set(vma, VM_MIXEDMAP | VM_DONTEXPAND | VM_DONTCOPY); vma->vm_ops = &arena_vm_ops; return 0; } _ Patches currently in -mm which might be from ljs@kernel.org are mm-vma-add-vma_is_mm_managed-predicates.patch mm-vma-only-allow-mmap-to-clear-vma_maywrite_bit-if-not-mm-managed.patch mm-vma-add-and-use-vma__is_fixed_mapping.patch scsi-sg-convert-mmap-hook-to-mmap_prepare-and-rework.patch fbdev-defio-assert-fbinfo_virtfb-drop-vm_io-add-vm_mixedmap.patch hsi-cmt_speech-convert-mmap-hook-to-mmap_prepare-refactor.patch mm-gup-error-out-early-on-vma_mayread_bit-vmas.patch uprobes-remove-vm_io-set-vm_mixedmap-for-mapped-kernel-pages.patch mm-mlock-clear-vma_locked_mask-over-mmap-callback.patch mm-mlock-eliminate-weird-vma_io_bit-abuse-and-simplify.patch mm-vma-enforce-that-mm-managed-mappings-may-not-set-vma_io_bit.patch mm-remove-vma_io_bit-check-in-vma_is_mm_managed.patch mm-remove-hugetlb_inlineh.patch mm-rename-is_vm_hugetlb_page-to-vma_is_hugetlb.patch mm-drop-some-redundant-checks-around-hugetlb-vmas.patch mm-madvise-update-is_valid_guard_vma-to-use-vma_can_merge.patch mm-vma-introduce-vma_is_mm_backed.patch mm-uffd-use-predicates-for-userfaultfd-checks.patch mm-madvise-use-predicates-for-madvise-madv_dofork.patch mm-eliminate-vma_special_flags-usage-when-hugetlb-explicitly-tested.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-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