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Date: Mon, 12 Jan 2026 13:22:16 -0800
From: Andrew Morton <akpm@linux-foundation.org>
To: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: linux-kernel@vger.kernel.org, "Paul E. McKenney" <paulmck@kernel.org>,
 Steven Rostedt <rostedt@goodmis.org>, Masami Hiramatsu
 <mhiramat@kernel.org>, Dennis Zhou <dennis@kernel.org>, Tejun Heo
 <tj@kernel.org>, Christoph Lameter <cl@linux.com>, Martin Liu
 <liumartin@google.com>, David Rientjes <rientjes@google.com>,
 christian.koenig@amd.com, Shakeel Butt <shakeel.butt@linux.dev>, SeongJae
 Park <sj@kernel.org>, Michal Hocko <mhocko@suse.com>, Johannes Weiner
 <hannes@cmpxchg.org>, Sweet Tea Dorminy <sweettea-kernel@dorminy.me>,
 Lorenzo Stoakes <lorenzo.stoakes@oracle.com>, "Liam R . Howlett"
 <liam.howlett@oracle.com>, Mike Rapoport <rppt@kernel.org>, Suren
 Baghdasaryan <surenb@google.com>, Vlastimil Babka <vbabka@suse.cz>,
 Christian Brauner <brauner@kernel.org>, Wei Yang
 <richard.weiyang@gmail.com>, David Hildenbrand <david@redhat.com>, Miaohe
 Lin <linmiaohe@huawei.com>, Al Viro <viro@zeniv.linux.org.uk>,
 linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, Yu Zhao
 <yuzhao@google.com>, Roman Gushchin <roman.gushchin@linux.dev>, Mateusz
 Guzik <mjguzik@gmail.com>, Matthew Wilcox <willy@infradead.org>, Baolin
 Wang <baolin.wang@linux.alibaba.com>, Aboorva Devarajan
 <aboorvad@linux.ibm.com>
Subject: Re: [PATCH v14 0/3] mm: Fix OOM killer inaccuracy on large
 many-core systems
Message-Id: <20260112132216.1e347117f15fbf44c752bed1@linux-foundation.org>
In-Reply-To: <20260112200056.1250404-1-mathieu.desnoyers@efficios.com>
References: <20260112200056.1250404-1-mathieu.desnoyers@efficios.com>
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On Mon, 12 Jan 2026 15:00:53 -0500 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> wrote:

> Introduce hierarchical per-cpu counters and use them for RSS tracking to
> fix the per-mm RSS tracking which has become too inaccurate for OOM
> killer purposes on large many-core systems.

Thanks, I'll throw this back into the testing pot while monitoring the
discussion with Michal.