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[109.81.87.131]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4834d5e0ed5sm164667535e9.5.2026.02.11.23.29.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 11 Feb 2026 23:29:54 -0800 (PST) Date: Thu, 12 Feb 2026 08:29:52 +0100 From: Michal Hocko To: JP Kobryn Cc: linux-mm@kvack.org, apopple@nvidia.com, akpm@linux-foundation.org, axelrasmussen@google.com, byungchul@sk.com, cgroups@vger.kernel.org, david@kernel.org, eperezma@redhat.com, gourry@gourry.net, jasowang@redhat.com, hannes@cmpxchg.org, joshua.hahnjy@gmail.com, Liam.Howlett@oracle.com, linux-kernel@vger.kernel.org, lorenzo.stoakes@oracle.com, matthew.brost@intel.com, mst@redhat.com, rppt@kernel.org, muchun.song@linux.dev, zhengqi.arch@bytedance.com, rakie.kim@sk.com, roman.gushchin@linux.dev, shakeel.butt@linux.dev, surenb@google.com, virtualization@lists.linux.dev, vbabka@suse.cz, weixugc@google.com, xuanzhuo@linux.alibaba.com, ying.huang@linux.alibaba.com, yuanchu@google.com, ziy@nvidia.com, kernel-team@meta.com Subject: Re: [PATCH 1/2] mm/mempolicy: track page allocations per mempolicy Message-ID: References: <20260212045109.255391-1-inwardvessel@gmail.com> <20260212045109.255391-2-inwardvessel@gmail.com> Precedence: bulk X-Mailing-List: virtualization@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260212045109.255391-2-inwardvessel@gmail.com> On Wed 11-02-26 20:51:08, JP Kobryn wrote: > It would be useful to see a breakdown of allocations to understand which > NUMA policies are driving them. For example, when investigating memory > pressure, having policy-specific counts could show that allocations were > bound to the affected node (via MPOL_BIND). > > Add per-policy page allocation counters as new node stat items. These > counters can provide correlation between a mempolicy and pressure on a > given node. Could you be more specific how exactly do you plan to use those counters? -- Michal Hocko SUSE Labs