From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 C9A14436353; Fri, 27 Feb 2026 20:09:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772222948; cv=none; b=pGFzacWEc6Amj8LiGF2pGv9z3bjLTIcq89KY0uozbm7dbsLydNEU3tESFagTIjfNLDmpynYe/CI+90bP8scKgU50VoxgDR5ADITw045zlHnQMpY+BPH2Q4Mhw0WQCrBfXrURpElJ6rAJaBCkaejgj6tn186H6mqBni1ozbwQiQs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772222948; c=relaxed/simple; bh=uHYxem2rcFuwlV7scbCWwSyUtQMuMwhNJjysCrEHJOo=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-Type; b=YbvCO6JDGqgYiEjuhsslSKBkQEZUt3dExi+/dAlLm73KS0EsMiorQHiTgkrXS/AaBod4VmCYvyf7A9yGbsQZ35cPugS+p0V0SXyxeCo/P0eOlFX1uz63KtVzN4UxmU+yv7nRFo5n5t+RpMZHGBuVgjNsdjGjPUN4KRa0evH3dHE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=P+U9FbqK; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="P+U9FbqK" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 56E88C116C6; Fri, 27 Feb 2026 20:08:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772222948; bh=uHYxem2rcFuwlV7scbCWwSyUtQMuMwhNJjysCrEHJOo=; h=From:To:Cc:Subject:Date:From; b=P+U9FbqKF3CgiBsEPqPexZzZ93XmAcCqzSbUwaOX1Y8siePI12ijG2mxzI5YIf0mL /ms5mDjzZ41zbR+y1lyjSjd5si16Ajj3yoCRxi8QeNf7VJlp5WbLWxR/Cm1nnjaTYO IOJj8irdOEN+aJhdaLJh+fKK7+dKb7KlCCDxdNslqcoGrctiSrHy1YeE9LnRXJRhDK ivNZRpe0JCZ8M0dux5O/xFyufs7KMwSQdWCOqjqmQAjFgGIXu0NS+l21cUs4WBsHt5 gFLiipJYdZxphu1iU6VvsVMrLyOefgdnpc25102oxNzG5Kz3JMlEpdrlW7fczulnx6 d9eorSp6XyA4Q== From: "David Hildenbrand (Arm)" To: linux-kernel@vger.kernel.org Cc: "linux-mm @ kvack . org" , "David Hildenbrand (Arm)" , Andrew Morton , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jann Horn , Pedro Falcato , David Rientjes , Shakeel Butt , "Matthew Wilcox (Oracle)" , Alice Ryhl , Madhavan Srinivasan , Michael Ellerman , Christian Borntraeger , Janosch Frank , Claudio Imbrenda , Alexander Gordeev , Gerald Schaefer , Heiko Carstens , Vasily Gorbik , Jarkko Sakkinen , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Greg Kroah-Hartman , =?UTF-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= , Todd Kjos , Christian Brauner , Carlos Llamas , Ian Abbott , H Hartley Sweeten , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , David Airlie , Simona Vetter , Jason Gunthorpe , Leon Romanovsky , Dimitri Sivanich , Arnd Bergmann , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Peter Zijlstra , Arnaldo Carvalho de Melo , Namhyung Kim , Andy Lutomirski , Vincenzo Frascino , Eric Dumazet , Neal Cardwell , "David S. Miller" , David Ahern , Jakub Kicinski , Paolo Abeni , Miguel Ojeda , linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, linux-s390@vger.kernel.org, linux-sgx@vger.kernel.org, intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-rdma@vger.kernel.org, bpf@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-fsdevel@vger.kernel.org, netdev@vger.kernel.org, rust-for-linux@vger.kernel.org, x86@kernel.org Subject: [PATCH v1 00/16] mm: cleanups around unmapping / zapping Date: Fri, 27 Feb 2026 21:08:31 +0100 Message-ID: <20260227200848.114019-1-david@kernel.org> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit A bunch of cleanups around unmapping and zapping. Mostly simplifications, code movements, documentation and renaming of zapping functions. With this series, we'll have the following high-level zap/unmap functions (excluding high-level folio zapping): * unmap_vmas() for actual unmapping (vmas will go away) * zap_vma(): zap all page table entries in a vma * zap_vma_for_reaping(): zap_vma() that must not block * zap_vma_range(): zap a range of page table entries * zap_vma_range_batched(): zap_vma_range() with more options and batching * zap_special_vma_range(): limited zap_vma_range() for modules * __zap_vma_range(): internal helper Patch #1 is not about unmapping/zapping, but I stumbled over it while verifying MADV_DONTNEED range handling. Patch #16 is related to [1], but makes sense even independent of that. [1] https://lore.kernel.org/r/aYSKyr7StGpGKNqW@google.com The CC list is already long enough. As these are simple changes to drivers/arch code, I'm only CCing maintainers of all changes but only reviewers of the MM bits. Cc: Andrew Morton Cc: Lorenzo Stoakes Cc: "Liam R. Howlett" Cc: Vlastimil Babka Cc: Mike Rapoport Cc: Suren Baghdasaryan Cc: Michal Hocko Cc: Jann Horn Cc: Pedro Falcato Cc: David Rientjes Cc: Shakeel Butt Cc: "Matthew Wilcox (Oracle)" Cc: Alice Ryhl Cc: Madhavan Srinivasan Cc: Michael Ellerman Cc: Christian Borntraeger Cc: Janosch Frank Cc: Claudio Imbrenda Cc: Alexander Gordeev Cc: Gerald Schaefer Cc: Heiko Carstens Cc: Vasily Gorbik Cc: Jarkko Sakkinen Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: Greg Kroah-Hartman Cc: "Arve Hjønnevåg" Cc: Todd Kjos Cc: Christian Brauner Cc: Carlos Llamas Cc: Alice Ryhl Cc: Ian Abbott Cc: H Hartley Sweeten Cc: Jani Nikula Cc: Joonas Lahtinen Cc: Rodrigo Vivi Cc: Tvrtko Ursulin Cc: David Airlie Cc: Simona Vetter Cc: Jason Gunthorpe Cc: Leon Romanovsky Cc: Dimitri Sivanich Cc: Arnd Bergmann Cc: Alexei Starovoitov Cc: Daniel Borkmann Cc: Andrii Nakryiko Cc: Peter Zijlstra Cc: Arnaldo Carvalho de Melo Cc: Namhyung Kim Cc: Andy Lutomirski Cc: Vincenzo Frascino Cc: Eric Dumazet Cc: Neal Cardwell Cc: "David S. Miller" Cc: David Ahern Cc: Jakub Kicinski Cc: Paolo Abeni Cc: Miguel Ojeda Cc: linuxppc-dev@lists.ozlabs.org Cc: kvm@vger.kernel.org Cc: linux-s390@vger.kernel.org Cc: linux-sgx@vger.kernel.org Cc: intel-gfx@lists.freedesktop.org Cc: dri-devel@lists.freedesktop.org Cc: linux-rdma@vger.kernel.org Cc: bpf@vger.kernel.org Cc: linux-perf-users@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org Cc: netdev@vger.kernel.org Cc: rust-for-linux@vger.kernel.org Cc: x86@kernel.org David Hildenbrand (Arm) (16): mm/madvise: drop range checks in madvise_free_single_vma() mm/memory: remove "zap_details" parameter from zap_page_range_single() mm/memory: inline unmap_mapping_range_vma() into unmap_mapping_range_tree() mm/memory: simplify calculation in unmap_mapping_range_tree() mm/oom_kill: use MMU_NOTIFY_CLEAR in __oom_reap_task_mm() mm/oom_kill: factor out zapping of VMA into zap_vma_for_reaping() mm/memory: rename unmap_single_vma() to __zap_vma_range() mm/memory: move adjusting of address range to unmap_vmas() mm/memory: convert details->even_cows into details->skip_cows mm/memory: use __zap_vma_range() in zap_vma_for_reaping() mm/memory: inline unmap_page_range() into __zap_vma_range() mm: rename zap_vma_pages() to zap_vma() mm: rename zap_page_range_single_batched() to zap_vma_range_batched() mm: rename zap_page_range_single() to zap_vma_range() mm: rename zap_vma_ptes() to zap_special_vma_range() mm/memory: support VM_MIXEDMAP in zap_special_vma_range() arch/powerpc/platforms/book3s/vas-api.c | 2 +- arch/powerpc/platforms/pseries/vas.c | 2 +- arch/s390/mm/gmap_helpers.c | 2 +- arch/x86/kernel/cpu/sgx/encl.c | 2 +- drivers/android/binder/page_range.rs | 4 +- drivers/android/binder_alloc.c | 2 +- drivers/comedi/comedi_fops.c | 2 +- drivers/gpu/drm/i915/i915_mm.c | 4 +- drivers/infiniband/core/uverbs_main.c | 6 +- drivers/misc/sgi-gru/grumain.c | 2 +- include/linux/mm.h | 23 ++- kernel/bpf/arena.c | 3 +- kernel/events/core.c | 2 +- lib/vdso/datastore.c | 2 +- mm/internal.h | 7 +- mm/interval_tree.c | 5 - mm/madvise.c | 24 +-- mm/memory.c | 217 ++++++++++++------------ mm/oom_kill.c | 15 +- mm/page-writeback.c | 2 +- net/ipv4/tcp.c | 7 +- rust/kernel/mm/virt.rs | 4 +- 22 files changed, 162 insertions(+), 177 deletions(-) base-commit: df9c51269a5e2a6fbca2884a756a4011a5e78748 -- 2.43.0