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b=Jopbo+g77IaQmMmCio+rl3i9VUarbuNVBVxqG8AHrfG1fX+ebMSjZzMCe4tCMyStP DAM6GNubpMvhq49iPRThsGxP+bigsXiB1pNDgN4tY5ByJoDGRu6aCnXAdmFAO3zPD1 XePpT2/wcyC1Uy082oCXug+ft5RiaywilfbLfLDk= Date: Mon, 27 Apr 2026 14:11:23 -0700 From: Andrew Morton To: "JP Kobryn (Meta)" Cc: linux-mm@kvack.org, vbabka@kernel.org, mhocko@suse.com, ying.huang@linux.alibaba.com, hannes@cmpxchg.org, shakeel.butt@linux.dev, gourry@gourry.net, kasong@tencent.com, qi.zheng@linux.dev, baohua@kernel.org, axelrasmussen@google.com, yuanchu@google.com, weixugc@google.com, david@kernel.org, ljs@kernel.org, liam@infradead.org, rppt@kernel.org, surenb@google.com, ziy@nvidia.com, matthew.brost@intel.com, joshua.hahnjy@gmail.com, rakie.kim@sk.com, byungchul@sk.com, apopple@nvidia.com, linux-kernel@vger.kernel.org, kernel-team@meta.com Subject: Re: [PATCH v4] mm/mempolicy: track user-defined mempolicy allocations Message-Id: <20260427141123.734c66450100c0f900e02947@linux-foundation.org> In-Reply-To: <20260427151520.137341-1-jp.kobryn@linux.dev> References: <20260427151520.137341-1-jp.kobryn@linux.dev> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: A0DCF10000B X-Rspam-User: X-Stat-Signature: tbqo9sz8mmqkzjhi4jsmh79ttn36xxh5 X-HE-Tag: 1777324286-990912 X-HE-Meta: U2FsdGVkX1+5jLoamzMLPwkS6iM18R/WjrQFKpU9ptV8FQZG7E2JuxYCsBHR+wS3a4zQkVouJGLnJ+QtaqHfbM7oWzv/rPuedd8nViZR3JLRSQvqBmSzpNaOVEpg6ltb/fPuHUieMV9XDZl6hV6S9j+kM+LZCvK7UNMZW+atqWje1q01zLrC7QKybO4SOawYaYE8Mpx3EFSOj7gsRfsHJnGVHkMvuSnIIHr20CvYxi58KKMZMDODAfDfI8LrCi3eQaGj62iKbFy+25ecPV5EzqJXYSw2tUBwIvV7HOhCHZbc9Lo2GKHRqAehm0iDCN3bkejAJkmtXJuBxytwK2VTB1ChZWVMpaqO1s7vWaihy00LGPLbk7RbU86TUSw7f7XYqFBsmsiqfxmOYoC8gSQy2h2kObQCwh/evpJGzc+iDdds3RxGFjPe9f4Mt0pxVgaBSBZeVrSEwDvHygBv/iDNtwByEmHz8UHF8hyDtnbFxZAURL4h/SwonvYkmBLQmuCZuqflNhWA0kilj/Ot0bOv+fJ2WP74v2omSKkGZwCDzp9hWoLK7h1C5y855TBnNOJhzlpP8TqUZCIak6BoDNuwXUF+GxBIdFcIb1f3m+tbfkAzXbsdGa1vf5CH0U8yP//twwwH0Jli9qjWZdmPODBFLHUgOB+ExEjple/Uhwp6+i46zrXLQNIzbCyrh6kvdfKZlOdqJhit4gaQH0JFJOQJ7YeGkSeAG6h7K8rqQZ4kXZhuNSMVrYouooIqRHHkJp6Lm1U41lf5ccDLSgi7gmorDWa9awua6sCpMOCRJzwR3a8JAjdmdC9B/W5WqExhzqlTeStGP00AxtP9t/SJVjDMl16VPBC3V/9zeNy9ATZAVizMUGyejGMSd9ZsranI6GlDCpFHUfZ7iVhhGr/bddADoMOeayBOlWcyvKrHBGKSRbdMeUtJj4214k8KkpKF2tjGLcFsv2ZHKVMOtcrb8Su SMnK6nbi V95ggmrPAG7GzoqeqcrytUWzLh4Flqnzv5mkyiofeLmqQq/tJcDcnYM72g3EH5we/Z2TBMNB/Ug1sL+YuqTzbhYPN1j6o+ScYTO9Cy5gye4S88rnl5+v3b0jNDio+gN5ZA23yS6Md4N72LTDb9A598/jG+QvbyES7QHIRIcEjAKfkgMGjVcEhWatAm0EINVUVQF7gwo5Mt2vJsiHyzXa1DgFH/elPrjmxrD8roNS/xJGUY0Zl4+K0HT23XNGzqD6zx7TGe0n8Qj01SauxFqb8a/UoW/UVkd8vgl9e7bW11ZvZc5L9f9c32jGGst7QGGWbGfIMIgGCQCOj7Pf1lu5IcfJlTq+UbCF1GHfxzKw6WRfHNGDpVvYr2O8s6oKQsBnau0L/ Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Mon, 27 Apr 2026 08:15:20 -0700 "JP Kobryn (Meta)" wrote: > When investigating pressure on a NUMA node, there is no straightforward way > to determine which user-defined policies are driving allocations to it. > > Add NUMA mempolicy allocation counters as new node stat items. These > counters track allocations to nodes and also whether the allocations were > intentional or fallbacks. AI review: https://sashiko.dev/#/patchset/20260427151520.137341-1-jp.kobryn@linux.dev