From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-qk1-f171.google.com (mail-qk1-f171.google.com [209.85.222.171]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2D53E40A94B for ; Mon, 20 Jul 2026 19:35:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.222.171 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784576121; cv=none; b=mNX6xzLVOxTRQRVIG33UlSiYqcPIOf+n4N5S4RJEss1G91pb/gDus51zzCCaVd+UYLaL3FbF7V+eZL2rMBwm9RWWG1NIB9sQHlf3pr868gmrK+FM8XUcuamKMN5fjI74zuvIY/7Q1huQ0W2D2NgXtlbo9yn7fJSujEDFQ8wSlh0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784576121; c=relaxed/simple; bh=YDZvVuwxxNQNjdV0uMiVC+0kbWzivRWlBZFWKXKo0fQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=SfO4NX03NRltFaQTrtozh9f0GDpGEfeljY6ojDs2lGHWBDwjSD8iNX/vABa7vgXBhB8kOqinj7YdLlAovPdTWHYk0wSelnLFBQUgj7iOhOB+HNQ1rRTPJW8hxt0sp0PRnvT8R1FCZxYRhoNAaqySK986sPhUx9QbKQ6l93fgtL4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=gourry.net; spf=pass smtp.mailfrom=gourry.net; dkim=pass (2048-bit key) header.d=gourry.net header.i=@gourry.net header.b=UkNy6Lyf; arc=none smtp.client-ip=209.85.222.171 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=gourry.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gourry.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gourry.net header.i=@gourry.net header.b="UkNy6Lyf" Received: by mail-qk1-f171.google.com with SMTP id af79cd13be357-92e50979c71so1168487785a.3 for ; Mon, 20 Jul 2026 12:35:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gourry.net; s=google; t=1784576115; x=1785180915; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to:content-type; bh=Bn1va8d6JpVtah/28aJ2nDxAxk/IiYTaqElYsPWqJNc=; b=UkNy6LyfbqXF9yIeCYdJyilNhqzXgUux1X1hd6mYEUcb/KF6frIUHMm4glreGepqiR dkGrwvm03lgliafPrVgh/K2lSTt+JMh4f3Q26AkwdQDhYLEgxNFln4OOIIL0HAhwUN1j ASTYMqe5SWSQau6D4RKTKMbwTTHFCWlugLVvqbfsV4qG2Ti5LUTHoJz2ofGrjb5cnMh+ 5AWDqCtxMuLDf2B8BHg2xqq3tevfeQe1n5KCFBZa+fc+glDYONDJRhIkqRpnDAIUWMBm NBFn0KyHXZmhjlKQ70uZoESWndE4PpY1AyRlM5fd0+IgLPKdYugn8VdkXuu9FGgvth8G Ybaw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1784576115; x=1785180915; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to:content-type; bh=Bn1va8d6JpVtah/28aJ2nDxAxk/IiYTaqElYsPWqJNc=; b=gvfC+aWngMA0nSSgP+xRP9Mm9zpJ7nFzROLgL7yoRHyePdScUss7GPyO+y7G3zUMIt wGQThElDWJ9W+eqWe9/hnLLhWDhJW7I+VOdGhnCoRkPnBdy3umOr+yjrqh2uuofQtv4+ ggYKT/ygCxcAqhMsdcb5hg6G8w2347kfKUziBbC7sPhmK3BmS+zDqvG4Z2bl7Hw2i0o6 DULWVIlNnszmpO2sns/2/D5NGXKEygbbnwFCHgvvBwNjH1R+ExlU0/+yG1daR5oRhyLf ZPck0jQ2XXU5HBHEkl+hMAnMw9wC0rC5n+7lHBQmzNcB12FzjiuYrJwRlSwl+OsuewCf /1HA== X-Forwarded-Encrypted: i=1; AHgh+Rq8pKB80KVdepHOO8qa6tG1ztcs7k3G70xHrmgUVWAkF0dV8CpyWZtUvurAfo3+rBVFZ/ecpNzc@vger.kernel.org X-Gm-Message-State: AOJu0YyYOmG3RU8rIyiygM7zXusyeRLVvy89rRdB6mFJ5NJgkzZd5rWY BUo8EiHvNm3cyPd2JeUkwZ9kLHlqgAUbMzJ2NeOgw+MH+gn2/M4tQ8m/Tp4i6CTQ+Zk= X-Gm-Gg: AfdE7cmsCcdCf40M7cLwSt2hYyjc94zNcmmkRRrURAiH7WQMtY8OSQ2hfS+a7dwSB+6 NGxzxbxJn5Tom1CnJJBqr4nipB7mo/FPU2kjpkay5XkdZqUyeik0YdATmTo/VU3SNcGMZkbqc/R u/AabIy944KambKjO+S6VUNq6QzCXxsqEk1KhrtXsxTnqlsLprL1vhE+LOuo/k77pwqOLokAjPZ dd3kJJShhcunjE43A6NwVOPi80DOOeBN+0YtCp/1y9IqEgBCE2GEKu42xkkJ38wyns8q7kxrJJj aoZ/xElxqWau4e0+t/diahM7wEXqQiElbrWciYHIsDvhlTH4USaXdjrM8jU0FkAEEy4WB8Rw08S jxIGoqfnljjv6m2JETEP7RYsHM8nTiJ+WJ0HP0UKOdXS4CsUdTbxGwYHTvluynbt3GGUFjFOYNB GuYkNstDUFPjk2EpRSTivqBUZu6sEhgHcpHBiogALMYpzFXzK2wppeLEYbERPUk10= X-Received: by 2002:a05:620a:f0b:b0:92e:5ffe:7833 with SMTP id af79cd13be357-930b41d083dmr1531787885a.61.1784576115361; Mon, 20 Jul 2026 12:35:15 -0700 (PDT) Received: from gourry-fedora-PF4VCD3F.lan (pool-173-79-60-52.washdc.fios.verizon.net. [173.79.60.52]) by smtp.gmail.com with ESMTPSA id af79cd13be357-930b545e47bsm957792285a.35.2026.07.20.12.35.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 Jul 2026 12:35:15 -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 14/36] mm/damon: skip private node memory in DAMON migration and pageout Date: Mon, 20 Jul 2026 15:34:08 -0400 Message-ID: <20260720193431.3841992-15-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> Precedence: bulk X-Mailing-List: cgroups@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit DAMON operates on physical address ranges, which can cover private node memory. Skip private-node folios in both DAMON's migration and reclaim paths. Signed-off-by: Gregory Price --- mm/damon/paddr.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c index e4f98d67461f5..c741a94319750 100644 --- a/mm/damon/paddr.c +++ b/mm/damon/paddr.c @@ -12,6 +12,7 @@ #include #include #include +#include #include "../internal.h" #include "ops-common.h" @@ -250,6 +251,10 @@ static unsigned long damon_pa_pageout(struct damon_region *r, continue; } + /* private node memory is not reclaimable by default */ + if (folio_is_private_node(folio)) + goto put_folio; + if (damos_pa_filter_out(s, folio)) goto put_folio; else @@ -344,6 +349,10 @@ static unsigned long damon_pa_migrate(struct damon_region *r, else *sz_filter_passed += folio_size(folio) / addr_unit; + /* private nodes do not support migration by default */ + if (folio_is_private_node(folio)) + goto put_folio; + if (!folio_isolate_lru(folio)) goto put_folio; list_add(&folio->lru, &folio_list); -- 2.53.0-Meta