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[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> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 4E53640002 X-Stat-Signature: z9h4ifuygykeua1rosfiaigmufq7r4us X-HE-Tag: 1784576116-419394 X-HE-Meta: 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 5Xct2g6P Ob/55+WLze+1fohJRt4WSA2uefW/GSJFOaOtU5GHtqO58UoRtT8URj90xWcVpFqUJ0j56CzLMPmj74NR8J2mzytCJoX+saBs8hmWBpuwW1n2yZ3FdM4GPF3kQLMDbwzm79oPr6ErWVcc5NCEgRmm8DGlKGWSsNfiqC2H/mv5ur8l6H7Ql16FYeFbcWVG7TYQdw3dl2Tu95B/di+w091g+ON8Yly2XagzLZySDgdi3hn7cBLeRi93NlWDkfHvxd5x6WSfQoEWXrrxLiVbI2gk1ppMu+h74LDr5/8cFk0Iak6Y1ZSm4qUmhGVuWbIMbZqrP2iqdaAO79BXMuWnZqQYfJ6jZ9LE1HEcCRRf3vvXMGKum6/N9/3xegoGCo1x8T0Grda2Y Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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