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[96.255.20.138]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-5070d53f0fcsm38640631cf.9.2026.02.22.00.49.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 22 Feb 2026 00:49:16 -0800 (PST) From: Gregory Price To: lsf-pc@lists.linux-foundation.org Cc: linux-kernel@vger.kernel.org, linux-cxl@vger.kernel.org, cgroups@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, damon@lists.linux.dev, kernel-team@meta.com, gregkh@linuxfoundation.org, rafael@kernel.org, dakr@kernel.org, dave@stgolabs.net, jonathan.cameron@huawei.com, dave.jiang@intel.com, alison.schofield@intel.com, vishal.l.verma@intel.com, ira.weiny@intel.com, dan.j.williams@intel.com, longman@redhat.com, akpm@linux-foundation.org, david@kernel.org, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com, vbabka@suse.cz, rppt@kernel.org, surenb@google.com, mhocko@suse.com, osalvador@suse.de, ziy@nvidia.com, matthew.brost@intel.com, joshua.hahnjy@gmail.com, rakie.kim@sk.com, byungchul@sk.com, gourry@gourry.net, ying.huang@linux.alibaba.com, apopple@nvidia.com, axelrasmussen@google.com, yuanchu@google.com, weixugc@google.com, yury.norov@gmail.com, linux@rasmusvillemoes.dk, mhiramat@kernel.org, mathieu.desnoyers@efficios.com, tj@kernel.org, hannes@cmpxchg.org, mkoutny@suse.com, jackmanb@google.com, sj@kernel.org, baolin.wang@linux.alibaba.com, npache@redhat.com, ryan.roberts@arm.com, dev.jain@arm.com, baohua@kernel.org, lance.yang@linux.dev, muchun.song@linux.dev, xu.xin16@zte.com.cn, chengming.zhou@linux.dev, jannh@google.com, linmiaohe@huawei.com, nao.horiguchi@gmail.com, pfalcato@suse.de, rientjes@google.com, shakeel.butt@linux.dev, riel@surriel.com, harry.yoo@oracle.com, cl@gentwo.org, roman.gushchin@linux.dev, chrisl@kernel.org, kasong@tencent.com, shikemeng@huaweicloud.com, nphamcs@gmail.com, bhe@redhat.com, zhengqi.arch@bytedance.com, terry.bowman@amd.com Subject: [RFC PATCH v4 06/27] mm/mlock: skip mlock for managed-memory folios Date: Sun, 22 Feb 2026 03:48:21 -0500 Message-ID: <20260222084842.1824063-7-gourry@gourry.net> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260222084842.1824063-1-gourry@gourry.net> References: <20260222084842.1824063-1-gourry@gourry.net> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Stat-Signature: zfodeunecexwq5dmy48cn8infdnf5hy1 X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: C751D1C0012 X-HE-Tag: 1771750158-251802 X-HE-Meta: U2FsdGVkX18BuIqWrAEUw3fvnpV9vDOzjEtVgq8DJY12NNRtMOTB1kRwksFPocdCl/CDzJSgi/TzK11D6tnOOnptGY8fcejKUKH5ClGRXpR2/WYFOAeVrxMah5kfLvhV13dEBQh+LpxtQPX+Dklz5YDiicyApy2O8Mko21fxkQciPk8W5vfLkiaI9M5VbJ7+NulM6Mg86XHaLwoxBDEL/yXGw95IzkbI9ZuDPT3zXr5NVlRNbusBsF0cOnLiYaIa9G5BaVx5nHbAOXgZTpJ3Y+p9VXG5MlygiGbFFyPzt/DRFaGzsgi8AqMMgs9h6Bxiybj9uEDIlFFVY02AAtTlnwUkfKTMVufsDvUG7yaiTBvx791+zHh+4x60F3Q21eaCc4NushN2JrYqysKw9xb2Y8c5UgOYukyNFv93TyS6B+mAWFE2SSEKFb73QY4AHdr6LJZ1Y3Pww7ewKYSJ/A8KlTHGI0USCIz3d7uMLzAvnPydQbROkMKqMJdHt3zrlrb8Ih8SZew6QyjtI23NRT3TXf7mtTaCaDZWL3hqiitjfgB4aIlMeT+xPJlFki5cd3hTAk9EwUgbjceF6lM0hy4XWrUMIaBvwQpwzGbZkZSGRf/CGohQVmx3d8CLgLR0k+oiLoT+R0AokInwBmo79s63mGyGvjwYu1X5Xik/sGfes60R2adqVHrZdpJn8JfmyT/+DsS2x3Ek71gP10aGOQytQ3HUliTvDF2FmsylqzWZX5eq3Weu5Vn8BMAiuCT14TjeF11oU28wsKPw7JWDH6mwSf0pQed3cWOoIXPqszEBQiMTpyjbDMZc9cl083NdGb4D7/DqQ7BwA1ufjsyFS11+alpYHm36vmCqfvIiWoeWAC+QYpNzu6TYoj8wgQKQJUs//j/ajv3m153g8eixIYQcy5Z+yRi8HOMPNOKCKMDfKe2sKJIPtOmZ4A89AbHjBOEgSFGuQQc36zkMqh96hAS bzjNByz2 dHDIOgw00gbgmggujl4WOjYJfYl/xXGdPW99seNVH3B3VRUoRUqvt03oZ2Gi+i4YD3hXEQLLBKjZmoa7+Yl0uLPrqVfbfmUC1Z8SPb9DfI25Tmm/EYfZDquFWfBcelcJ88OG4R4mppfC9Ca0eQcSmI4pOe+OavxrtXuEt54PpKhi+rttP63jQD0UQhxtiBifO/9apq0NZldOCedNxMFvB8/TeF+p+kHbpxXkvEb5JJCsqu1vF9gNUBvth36cCeC0u40v1aZ3A+1ScTGdp0kWTOs1W4vq0KHEdvjFLzrsAB1PcrvOg4YB2b3kK88pvrYq0GfUl1Lu7Wx9rGaRIK41jp0OU5A== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Private node folios are managed by device drivers and should not be mlocked. The existing folio_is_zone_device check is already correctly placed to handle this - simply extend it for private nodes. Signed-off-by: Gregory Price --- mm/mlock.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/mm/mlock.c b/mm/mlock.c index 2f699c3497a5..c56159253e45 100644 --- a/mm/mlock.c +++ b/mm/mlock.c @@ -25,6 +25,7 @@ #include #include #include +#include #include "internal.h" @@ -366,7 +367,7 @@ static int mlock_pte_range(pmd_t *pmd, unsigned long addr, if (is_huge_zero_pmd(*pmd)) goto out; folio = pmd_folio(*pmd); - if (folio_is_zone_device(folio)) + if (unlikely(folio_is_private_managed(folio))) goto out; if (vma->vm_flags & VM_LOCKED) mlock_folio(folio); @@ -386,7 +387,7 @@ static int mlock_pte_range(pmd_t *pmd, unsigned long addr, if (!pte_present(ptent)) continue; folio = vm_normal_folio(vma, addr, ptent); - if (!folio || folio_is_zone_device(folio)) + if (!folio || unlikely(folio_is_private_managed(folio))) continue; step = folio_mlock_step(folio, pte, addr, end); -- 2.53.0