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McKenney" , Steven Rostedt , Masami Hiramatsu , Dennis Zhou , Tejun Heo , Christoph Lameter , Martin Liu , David Rientjes , christian.koenig@amd.com, SeongJae Park , Michal Hocko , Johannes Weiner , Sweet Tea Dorminy , Lorenzo Stoakes , "Liam R . Howlett" , Mike Rapoport , Suren Baghdasaryan , Vlastimil Babka , Christian Brauner , Wei Yang , David Hildenbrand , Miaohe Lin , Al Viro , Yu Zhao , Roman Gushchin , Mateusz Guzik , Matthew Wilcox , Baolin Wang , Aboorva Devarajan , David Carlier , Josh Law , linux-mm@kvack.org Subject: Re: [PATCH v21 0/6] Hierarchical Percpu Counters for RSS Message-ID: References: <20260901182857.26690-1-mathieu.desnoyers@efficios.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260901182857.26690-1-mathieu.desnoyers@efficios.com> X-Rspam-User: X-Stat-Signature: tu6a6b6kethnym5wdnmfij313r1b474n X-Rspamd-Queue-Id: 305F418000F X-Rspamd-Server: rspam06 X-HE-Tag: 1788455916-545812 X-HE-Meta: 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 eRgmkc1f 6zfnhTT3YFzqSdTJrsqEVDX3+nlCaGktnxpRdHjbxLQSBI6dafkLqhgTgFzWfws0qtU8eErFgb7lCbFs33Fno56a3SMbU6jVOwdOtQ/Bi2A9sw5dxkUlxzj3DTjKoAEZsS/d8wp55nWDrc28P5pgdFC23JuhuVqU7o8rrkyfVzQdbgtz/KJjHSJOOouo3Fa9t1J/IhktVDz6KnyOGUHS7YhKeVf5K2W+qB6bmycactkFRR+VILRGD978AbMCzFbzm65HTtK8aSkFOV/xewrOO8CTp/1NQVT91JhGRqGHqb9dw94o/CXN80unpLr5CgPf3FiG08rq9VCy+YTZ1l8SvONk7v1qIJ1QPUPXU1jstIWZjpjcjJNLdfa5o6xfN10faFdxTJW+WQ7HicM8vCWtUnNjaLC5JJnudlb2Vxbqax+jcA7oDJllAYls5NLGEXqmuQPP3HQcEHGI6w1t6CI5780P/4Q== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, Sep 01, 2026 at 02:28:45PM -0400, Mathieu Desnoyers wrote: > Hi Andrew, > > Here is the hierarchical percpu counters for RSS accounting series > rebased on top of v7.3-rc1. It includes small bootup fixes which were > needed to fix bootup sequence on specific architectures, and a rename of > the test config option to include "KUNIT_". > > This aims at replacing the prior version of the series you had > in mm. > > As a reminder, the goal here is to provide more precise RSS counters > through /proc. A future step would be to also use these counters to > speed up the OOM killer task selection when OOM is triggered by > memcg. In whole-machine OOM situations, latency introduced by the > OOM killer task selection may not be too much of an issue, but for > memcg, where cgroups may routinely depend on the OOM killer, the > acceptable latency tradeoff is quite different. > Hi Mathieu, can you please comment on the Sashiko's findings [1]? Worth addressing or not? [1] https://sashiko.dev/#/patchset/20260901182857.26690-1-mathieu.desnoyers%40efficios.com