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GET /api/patches/2202531/?format=api
{ "id": 2202531, "url": "http://patchwork.ozlabs.org/api/patches/2202531/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260227200848.114019-11-david@kernel.org/", "project": { "id": 2, "url": "http://patchwork.ozlabs.org/api/projects/2/?format=api", "name": "Linux PPC development", "link_name": "linuxppc-dev", "list_id": "linuxppc-dev.lists.ozlabs.org", "list_email": "linuxppc-dev@lists.ozlabs.org", "web_url": "https://github.com/linuxppc/wiki/wiki", "scm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git", "webscm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/", "list_archive_url_format": "https://lore.kernel.org/linuxppc-dev/{}/", "commit_url_format": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id={}" }, "msgid": "<20260227200848.114019-11-david@kernel.org>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/20260227200848.114019-11-david@kernel.org/", "date": "2026-02-27T20:08:41", "name": "[v1,10/16] mm/memory: use __zap_vma_range() in zap_vma_for_reaping()", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "3714543aa749da57922305ba6127e988dad55d6e", "submitter": { "id": 92023, "url": "http://patchwork.ozlabs.org/api/people/92023/?format=api", "name": "David Hildenbrand (Arm)", "email": "david@kernel.org" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260227200848.114019-11-david@kernel.org/mbox/", "series": [ { "id": 493807, "url": "http://patchwork.ozlabs.org/api/series/493807/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=493807", "date": "2026-02-27T20:08:31", "name": "mm: cleanups around unmapping / zapping", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/493807/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2202531/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2202531/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linuxppc-dev+bounces-17418-incoming=patchwork.ozlabs.org@lists.ozlabs.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linuxppc-dev@lists.ozlabs.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=mqTK4ziI;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=2404:9400:21b9:f100::1; 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a=rsa-sha256; d=lists.ozlabs.org; s=201707;\n\tt=1772223116; c=relaxed/relaxed;\n\tbh=V07slyxq3arKEFSTLk3cL4jebUrSDREMfZ8omvVNUpo=;\n\th=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References:\n\t MIME-Version;\n b=OrSI3Shj1jH3RxeaTZRT/F2TDr5hIiUz70xBuqsfWI0ZoCoH4PItpNpA8AvWySvki5Q2QVpFdMkiI0AhiV/+tThTIJ4RP3j5ugzol4III9Y/xYmnSWhF6dZBTkGQqQRWNDv7PVaVstwOhkJkGz7BxEuUmZX0CqII7H7FslTZhdkf8TsMWpYLFlJW6cbaLK9/3jAkdMk2d6r8v73VjyU3ZG01/+w4C6uOgCB2BgVUiioyK6OHTkRYh1Ty+WZGZ6Xdx2l8sfjwYP0GvGM8RdwPsC6NYAE4BWGlF74g1AD5OCn7BfLo5/A5LNTm6SWE+5qHFBIAUOXt5Ie/JpKf2vmsPQ==", "ARC-Authentication-Results": "i=1; lists.ozlabs.org;\n dmarc=pass (p=quarantine dis=none) header.from=kernel.org;\n dkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=mqTK4ziI; dkim-atps=neutral;\n spf=pass (client-ip=2600:3c0a:e001:78e:0:1991:8:25;\n helo=sea.source.kernel.org; envelope-from=david@kernel.org;\n receiver=lists.ozlabs.org) smtp.mailfrom=kernel.org", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org;\n\ts=k20201202; t=1772223114;\n\tbh=I5k8d/7BhjTgSAWiS/rU+NWa+WlmbxH2nIHZouG4qQM=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=mqTK4ziIkeceLpOMlpc9Z3pxLBxf+uElw1bxcxQsf50OwHmsXyG8JxCnQBvafY8L8\n\t CBoR0oUKd8BfbexVek1eSk440DDZw8CZg1d3pBVVBhMAofC8lV7GSd4wOs8ZGvwQc6\n\t gG2H8vqWX8ELemznuQXqyAwHtagW9ERzcgDt+oTFrkOj6Hnrd+KZQbWXQcmnthmek8\n\t +vBEQhzvxIXjGxGImAh3NyciAlusUwXZudtLW9IZnKynhZJO4tb/IuLubzDUsLdgNg\n\t 2YWaQinZZpstMXww2VbVV42oOagkVcy4IAHbH1UPy7e8FZkiElL1SY+N80lOyHpM+g\n\t OaaWmRapbAJgA==", "From": "\"David Hildenbrand (Arm)\" <david@kernel.org>", "To": "linux-kernel@vger.kernel.org", "Cc": "\"linux-mm @ kvack . org\" <linux-mm@kvack.org>,\n \"David Hildenbrand (Arm)\" <david@kernel.org>,\n Andrew Morton <akpm@linux-foundation.org>,\n Lorenzo Stoakes <lorenzo.stoakes@oracle.com>,\n \"Liam R. Howlett\" <Liam.Howlett@oracle.com>,\n Vlastimil Babka <vbabka@kernel.org>, Mike Rapoport <rppt@kernel.org>,\n Suren Baghdasaryan <surenb@google.com>, Michal Hocko <mhocko@suse.com>,\n Jann Horn <jannh@google.com>, Pedro Falcato <pfalcato@suse.de>,\n David Rientjes <rientjes@google.com>, Shakeel Butt <shakeel.butt@linux.dev>,\n \"Matthew Wilcox (Oracle)\" <willy@infradead.org>,\n Alice Ryhl <aliceryhl@google.com>, Madhavan Srinivasan <maddy@linux.ibm.com>,\n Michael Ellerman <mpe@ellerman.id.au>,\n Christian Borntraeger <borntraeger@linux.ibm.com>,\n Janosch Frank <frankja@linux.ibm.com>,\n Claudio Imbrenda <imbrenda@linux.ibm.com>,\n Alexander Gordeev <agordeev@linux.ibm.com>,\n Gerald Schaefer <gerald.schaefer@linux.ibm.com>,\n Heiko Carstens <hca@linux.ibm.com>, Vasily Gorbik <gor@linux.ibm.com>,\n Jarkko Sakkinen <jarkko@kernel.org>, Thomas Gleixner <tglx@kernel.org>,\n Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,\n Greg Kroah-Hartman <gregkh@linuxfoundation.org>, =?utf-8?q?Arve_Hj=C3=B8nne?=\n\t=?utf-8?q?v=C3=A5g?= <arve@android.com>, Todd Kjos <tkjos@android.com>,\n Christian Brauner <brauner@kernel.org>, Carlos Llamas <cmllamas@google.com>,\n Ian Abbott <abbotti@mev.co.uk>,\n H Hartley Sweeten <hsweeten@visionengravers.com>,\n Jani Nikula <jani.nikula@linux.intel.com>,\n Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,\n Rodrigo Vivi <rodrigo.vivi@intel.com>, Tvrtko Ursulin <tursulin@ursulin.net>,\n David Airlie <airlied@gmail.com>, Simona Vetter <simona@ffwll.ch>,\n Jason Gunthorpe <jgg@ziepe.ca>, Leon Romanovsky <leon@kernel.org>,\n Dimitri Sivanich <dimitri.sivanich@hpe.com>, Arnd Bergmann <arnd@arndb.de>,\n Alexei Starovoitov <ast@kernel.org>, Daniel Borkmann <daniel@iogearbox.net>,\n Andrii Nakryiko <andrii@kernel.org>, Peter Zijlstra <peterz@infradead.org>,\n Arnaldo Carvalho de Melo <acme@kernel.org>,\n Namhyung Kim <namhyung@kernel.org>, Andy Lutomirski <luto@kernel.org>,\n Vincenzo Frascino <vincenzo.frascino@arm.com>,\n Eric Dumazet <edumazet@google.com>, Neal Cardwell <ncardwell@google.com>,\n \"David S. Miller\" <davem@davemloft.net>, David Ahern <dsahern@kernel.org>,\n Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,\n Miguel Ojeda <ojeda@kernel.org>, linuxppc-dev@lists.ozlabs.org,\n kvm@vger.kernel.org, linux-s390@vger.kernel.org, linux-sgx@vger.kernel.org,\n intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,\n linux-rdma@vger.kernel.org, bpf@vger.kernel.org,\n linux-perf-users@vger.kernel.org, linux-fsdevel@vger.kernel.org,\n netdev@vger.kernel.org, rust-for-linux@vger.kernel.org, x86@kernel.org", "Subject": "[PATCH v1 10/16] mm/memory: use __zap_vma_range() in\n zap_vma_for_reaping()", "Date": "Fri, 27 Feb 2026 21:08:41 +0100", "Message-ID": "<20260227200848.114019-11-david@kernel.org>", "X-Mailer": "git-send-email 2.43.0", "In-Reply-To": "<20260227200848.114019-1-david@kernel.org>", "References": "<20260227200848.114019-1-david@kernel.org>", "X-Mailing-List": "linuxppc-dev@lists.ozlabs.org", "List-Id": "<linuxppc-dev.lists.ozlabs.org>", "List-Help": "<mailto:linuxppc-dev+help@lists.ozlabs.org>", "List-Owner": "<mailto:linuxppc-dev+owner@lists.ozlabs.org>", "List-Post": "<mailto:linuxppc-dev@lists.ozlabs.org>", "List-Archive": "<https://lore.kernel.org/linuxppc-dev/>,\n <https://lists.ozlabs.org/pipermail/linuxppc-dev/>", "List-Subscribe": "<mailto:linuxppc-dev+subscribe@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-digest@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-nomail@lists.ozlabs.org>", "List-Unsubscribe": "<mailto:linuxppc-dev+unsubscribe@lists.ozlabs.org>", "Precedence": "list", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Spam-Status": "No, score=-0.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED,\n\tDKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,SPF_PASS\n\tautolearn=disabled version=4.0.1 OzLabs 8", "X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org" }, "content": "Let's call __zap_vma_range() instead of unmap_page_range() to prepare\nfor further cleanups.\n\nTo keep the existing behavior, whereby we do not call uprobe_munmap()\nwhich could block, add a new \"reaping\" member to zap_details and use it.\n\nLikely we should handle the possible blocking in uprobe_munmap()\ndifferently, but for now keep it unchanged.\n\nSigned-off-by: David Hildenbrand (Arm) <david@kernel.org>\n---\n include/linux/mm.h | 1 +\n mm/memory.c | 13 +++++++++----\n 2 files changed, 10 insertions(+), 4 deletions(-)", "diff": "diff --git a/include/linux/mm.h b/include/linux/mm.h\nindex 21b67c203e62..4710f7c7495a 100644\n--- a/include/linux/mm.h\n+++ b/include/linux/mm.h\n@@ -2800,6 +2800,7 @@ struct zap_details {\n \tstruct folio *single_folio;\t/* Locked folio to be unmapped */\n \tbool skip_cows;\t\t\t/* Do not zap COWed private pages */\n \tbool reclaim_pt;\t\t/* Need reclaim page tables? */\n+\tbool reaping;\t\t\t/* Reaping, do not block. */\n \tzap_flags_t zap_flags;\t\t/* Extra flags for zapping */\n };\n \ndiff --git a/mm/memory.c b/mm/memory.c\nindex 7d7c24c6917c..394b2e931974 100644\n--- a/mm/memory.c\n+++ b/mm/memory.c\n@@ -2079,14 +2079,18 @@ static void __zap_vma_range(struct mmu_gather *tlb, struct vm_area_struct *vma,\n \t\tunsigned long start, unsigned long end,\n \t\tstruct zap_details *details)\n {\n+\tconst bool reaping = details && details->reaping;\n+\n \tVM_WARN_ON_ONCE(start >= end || !range_in_vma(vma, start, end));\n \n-\tif (vma->vm_file)\n+\t/* uprobe_munmap() might sleep, so skip it when reaping. */\n+\tif (vma->vm_file && !reaping)\n \t\tuprobe_munmap(vma, start, end);\n \n \tif (unlikely(is_vm_hugetlb_page(vma))) {\n \t\tzap_flags_t zap_flags = details ? details->zap_flags : 0;\n \n+\t\tVM_WARN_ON_ONCE(reaping);\n \t\t/*\n \t\t * vm_file will be NULL when we fail early while instantiating\n \t\t * a new mapping. In this case, no pages were mapped yet and\n@@ -2111,11 +2115,12 @@ static void __zap_vma_range(struct mmu_gather *tlb, struct vm_area_struct *vma,\n */\n int zap_vma_for_reaping(struct vm_area_struct *vma)\n {\n+\tstruct zap_details details = {\n+\t\t.reaping = true,\n+\t};\n \tstruct mmu_notifier_range range;\n \tstruct mmu_gather tlb;\n \n-\tVM_WARN_ON_ONCE(is_vm_hugetlb_page(vma));\n-\n \tmmu_notifier_range_init(&range, MMU_NOTIFY_CLEAR, 0, vma->vm_mm,\n \t\t\t\tvma->vm_start, vma->vm_end);\n \ttlb_gather_mmu(&tlb, vma->vm_mm);\n@@ -2123,7 +2128,7 @@ int zap_vma_for_reaping(struct vm_area_struct *vma)\n \t\ttlb_finish_mmu(&tlb);\n \t\treturn -EBUSY;\n \t}\n-\tunmap_page_range(&tlb, vma, range.start, range.end, NULL);\n+\t__zap_vma_range(&tlb, vma, range.start, range.end, &details);\n \tmmu_notifier_invalidate_range_end(&range);\n \ttlb_finish_mmu(&tlb);\n \treturn 0;\n", "prefixes": [ "v1", "10/16" ] }