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[173.79.60.52]) by smtp.gmail.com with ESMTPSA id af79cd13be357-930b545e47bsm957792285a.35.2026.07.20.12.35.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 Jul 2026 12:35:01 -0700 (PDT) From: Gregory Price To: linux-mm@kvack.org Cc: Zhigang.Luo@amd.com, arun.george@samsung.com, balbirs@nvidia.com, brendan.jackman@linux.dev, yuzenghui@huawei.com, apopple@nvidia.com, alucerop@amd.com, matthew.brost@intel.com, akpm@linux-foundation.org, david@kernel.org, ljs@kernel.org, liam@infradead.org, vbabka@kernel.org, rppt@kernel.org, surenb@google.com, mhocko@suse.com, corbet@lwn.net, skhan@linuxfoundation.org, gregkh@linuxfoundation.org, rafael@kernel.org, dakr@kernel.org, djbw@kernel.org, vishal.l.verma@intel.com, dave.jiang@intel.com, alison.schofield@intel.com, osandov@osandov.com, jannh@google.com, pfalcato@suse.de, jackmanb@google.com, hannes@cmpxchg.org, ziy@nvidia.com, pbonzini@redhat.com, osalvador@suse.de, joshua.hahnjy@gmail.com, rakie.kim@sk.com, byungchul@sk.com, gourry@gourry.net, ying.huang@linux.alibaba.com, kasong@tencent.com, qi.zheng@linux.dev, shakeel.butt@linux.dev, baohua@kernel.org, axelrasmussen@google.com, yuanchu@google.com, weixugc@google.com, yury.norov@gmail.com, linux@rasmusvillemoes.dk, longman@redhat.com, ridong.chen@linux.dev, tj@kernel.org, mkoutny@suse.com, sj@kernel.org, jgg@ziepe.ca, jhubbard@nvidia.com, peterx@redhat.com, baolin.wang@linux.alibaba.com, npache@redhat.com, ryan.roberts@arm.com, dev.jain@arm.com, lance.yang@linux.dev, usama.arif@linux.dev, xu.xin16@zte.com.cn, chengming.zhou@linux.dev, roman.gushchin@linux.dev, muchun.song@linux.dev, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, driver-core@lists.linux.dev, nvdimm@lists.linux.dev, linux-cxl@vger.kernel.org, linux-debuggers@vger.kernel.org, linux-fsdevel@vger.kernel.org, kvm@vger.kernel.org, cgroups@vger.kernel.org, damon@lists.linux.dev, linux-kselftest@vger.kernel.org, kernel-team@meta.com Subject: [PATCH v5 09/36] mm/migrate: disallow userland driven migration for private nodes Date: Mon, 20 Jul 2026 15:34:03 -0400 Message-ID: <20260720193431.3841992-10-gourry@gourry.net> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260720193431.3841992-1-gourry@gourry.net> References: <20260720193431.3841992-1-gourry@gourry.net> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: BFCCC160005 X-Stat-Signature: epdxeyjzouxx9hk9sef5g4gf8bguguet X-Rspam-User: X-Rspamd-Server: rspam02 X-HE-Tag: 1784576102-172968 X-HE-Meta: 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 DUeY5bo5 8Zt6xu2CjHSaFZLEZSewljBjHzyVR8d+jmEVbPcQDqBHmK314I1PPdQCgq+/Y7rjNnBsPfTow4DKyiW7P237PhgYczzerNZuJs6HAIgC0SuXhjDkrabCwNkWANCq4uideXuLI7n3l4FdxVlf+kj7Rx30FqfKiecQ4aCplHJWpZ7IvZ1LGWU7nt0rSnooWAQ5Km9eB6AA441tqnaAF0ePfJx044Qkk0eFwTUiJCwOJEsVNX31pzrVuJWRQeLfqjEiDASWFZxLZunXzg4PDIgnd+Zx8BD3Szrm16xroBGYwQSouKOG5/Lm0h/AK1ZQR1o4FQHdUEYD+NH0GWLqPRlORgA/2rhtEpFQgQe7YeIrhZYJyHQbYQo34egQkr6jx62LGpoIZ Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Use the same filter locations as zone_device folios to disallow userland driven migration requests for private node memory. Signed-off-by: Gregory Price --- mm/migrate.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/migrate.c b/mm/migrate.c index a8a86141dbb54..d20674c07b947 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -2268,7 +2268,7 @@ static int __add_folio_for_migration(struct folio *folio, int node, if (is_zero_folio(folio) || is_huge_zero_folio(folio)) return -EFAULT; - if (folio_is_zone_device(folio)) + if (folio_is_private_managed(folio)) return -ENOENT; if (folio_nid(folio) == node) @@ -2477,7 +2477,7 @@ static void do_pages_stat_array(struct mm_struct *mm, unsigned long nr_pages, if (folio) { if (is_zero_folio(folio) || is_huge_zero_folio(folio)) err = -EFAULT; - else if (folio_is_zone_device(folio)) + else if (folio_is_private_managed(folio)) err = -ENOENT; else err = folio_nid(folio); -- 2.53.0-Meta