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b=XVmYSRoE6euKHfFwnaiDhnpBmWGbT907C2lFpgaBfbpl4U+4ISxr9AqyT6pARcZaX wJeE56M0QsINp8WXWmFS8zXuVk/sMuPJxGXhNzXXM+zGK/e+2KGPy0jMuID4x8Ke3P C6pCbQm3HD1d/C4kmi/btMdNA8+N/HVKL7FgMmeU= Date: Wed, 21 Oct 2026 11:52:40 -0700 From: Andrew Morton To: Zhen Ni Cc: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, eddyz87@gmail.com, memxor@gmail.com, martin.lau@linux.dev, song@kernel.org, yonghong.song@linux.dev, jolsa@kernel.org, emil@etsalapatis.com, ihor.solodrai@linux.dev, vbabka@kernel.org, surenb@google.com, mhocko@suse.com, brendan.jackman@linux.dev, hannes@cmpxchg.org, ziy@nvidia.com, shuah@kernel.org, bpf@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, Zhen Ni Subject: Re: [PATCH v3 0/7] mm/page_owner: add bpf_iter and kfuncs Message-Id: <20261021115240.f195a2a55364fe300cbb6983@linux-foundation.org> In-Reply-To: <20261021112437.1799213-1-zhen.ni@easystack.cn> References: <20261021112437.1799213-1-zhen.ni@easystack.cn> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) X-Archived-By: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 0DFE416000B X-Rspam-User: X-Stat-Signature: 3mq1yc19b1a4iyqajpt99d8jpf4nbuay X-Spam-Status: No, score=-8.1 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_PASS,SPF_PASS autolearn=ham autolearn_force=no version=4.0.1 X-Rspamd-Server: rspam03 X-HE-Tag: 1792608762-689740 X-HE-Meta: U2FsdGVkX18nrL+jO+YTFIAFBBaJgeQ0BL6g9m18CFw1AYVTedX7/avfDNFH54fNgLZEoBK8D2ynew46mCCubwhFpOtbbsFqbzdsjluMyaemQK48JiX7k49QhK5SgvTuCmMYXNx6x4JFhaJuIE4IxfJLUmnRY1WFkMrUb45gO72Z7FJUU2vpkV6cLYV2b3LMr8tCmGIslie3eVXFbToTT1RSOmHotN4qQ64yz/wvrbSahKKp+wMoqvbA96mWm15YvTR86ETJ1bN4LcYsGTZqUnzTBHSy2ugG3bc2BbyEfqrFekfFHgjW/odblo12LaIdBIwmSDVIQg6Nj35Q8rPc2uXiEaXL+yt6oJxjftBjl+2rbc4VealcbyL0Wof9skWOa5a7rK/0mWsY4KG38qpfqk7++p+gnuegytnOrpgQd4X2qoQRXzqm15xk9Z7cbTJ17GLmYWaFchrzcnASc6RVkjHTfikY9NHzxJA0lA9Y5xu0l0SpDROkVh4MylqB26MJMT9W2Wvw2b68m7hNZQgg1MiS3SVK3TjfPCyaiOhM1gt28NBqoyyAFSMfgMOe1F66G1QtCzaLi/4KIgu9sTk/l/AZq4MSLE8HigtBdG7e72U9Jow49IE8fLJDxUGAWOIVv4DXm6K0RO5jaViFfe82Pi3MD8DhszX0IOHkkqAxQ4sP24yUphg0HwqKiLJYzGz8JYsBUgwmarqjuvw1iSjn+gtTVyw+qf/FRBja0mh1USm4EXtk/efoAb5rOBELmyurfOBhZ6ywXVrsRd3alhGl75H/clO3lqQy0PzfocFMQc3IKN5U8xeb1R6hqDISov9SgVKC7KmgOWCYh/fRMrKFih1/sfsLq3trsdXsyw36RIHgk4ri9Dh7adzaL+u1wRS2y66woBewQqR84jXj3b8ZVKsfBFZczd1MobbLVWcGYz72IPbMoH/7hNG0hA9lWP3Qkh89/IocRmJk7bFpgZ9 afyW26xf bz9gQNxr4ZrUQdFXU0kVokRMYJlvfywDlVAhEPtmE2A4f1wWObr1eLE0OkaMwZacw+79XAroueexs2GeOzAzNeZJQReDAFBqd+VYdMmAl1f4SIxPz17X2axLABC+oGT/B94PqcYSdIf6Pa3AaIZYHaSpE9BJ/Z++QtOYmYbND4Uii+Tqy7RUmXB0lVFRwDnjmFtn0lGpqInhEngvwrN3LVpxthao+1ZYfK3CyiveH8KH9LreydPnj6s9R9f3ZQiht+QDi8hJDuUXfSlCJLapqTSlgetpCUjoee9h+Cbn6ltsE2Ls= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 On Wed, 21 Oct 2026 19:24:30 +0800 Zhen Ni wrote: > page_owner records who allocated every page and is a core memory-debug > facility, but it currently reaches userspace as the debugfs flat dump: > slicing allocations by pid, comm, NUMA node, cgroup or stack, etc., > means streaming and parsing the entire file in userspace, which is > expensive on large hosts and hard to query live. Confused. Your series 8570b65220e8 ("mm/page_owner: add print_mode filter") addressed this significantly?