From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id EC450CF45CF for ; Mon, 12 Jan 2026 21:22:21 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 410656B0092; Mon, 12 Jan 2026 16:22:21 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 3BE226B0093; Mon, 12 Jan 2026 16:22:21 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 2BD606B0095; Mon, 12 Jan 2026 16:22:21 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 17F726B0092 for ; Mon, 12 Jan 2026 16:22:21 -0500 (EST) Received: from smtpin27.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id C151AD2393 for ; Mon, 12 Jan 2026 21:22:20 +0000 (UTC) X-FDA: 84324585240.27.742ABD9 Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by imf25.hostedemail.com (Postfix) with ESMTP id 4E539A0011 for ; Mon, 12 Jan 2026 21:22:19 +0000 (UTC) Authentication-Results: imf25.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=VkBPeIk5; spf=pass (imf25.hostedemail.com: domain of akpm@linux-foundation.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org; dmarc=none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1768252939; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=J3VMesCThZ1UWC5jU0M9fsUjdYd6KTqtAF/dzXL2hyY=; b=plxicWKf4gD0FTrezKNdugajjgamMhJDS7VhHNn8h6tOr1Q9VDFJd9/t3C8cBzpR2aIpLA yINz+xYTWNtlsRs7NLrkuThs4UwZjI+OWEnBvBq7Rrq5je9xpjmxPspwf0igCcuFA3aCGS zyBQWRMNCCSWMP4XgeSI8FM4lqfrcW4= ARC-Authentication-Results: i=1; imf25.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=VkBPeIk5; spf=pass (imf25.hostedemail.com: domain of akpm@linux-foundation.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org; dmarc=none ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1768252939; a=rsa-sha256; cv=none; b=YpYGaEDK3D5gTfaXBqLkkCf8yKhk76YUTzE+bgidZkie9oML8UWp122UKItwCPbaZh5nLL k3IdTN+FYVbJmCy9y6Y47HKqcjA1YpYa5yfubu1b0eLYvTqk06dODow9Jr+Wuzub/tVMvS sB9rhTeEcbcYP+E2hfQHRmtCofUO4zU= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 9D8BC60017; Mon, 12 Jan 2026 21:22:18 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4105EC116D0; Mon, 12 Jan 2026 21:22:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1768252938; bh=J3VMesCThZ1UWC5jU0M9fsUjdYd6KTqtAF/dzXL2hyY=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=VkBPeIk5hnPI1Byvct97SYuIWm1QwmI6SaiV8Vx+6cunuESwapg0u70Kja7HHSdoV hoo3ndhtalp7KValVIHZ9iCFzOIir7VpqtW5W/h5Ulf6DyVfK8fz5KQzVtUkPuXaEj TJlNZtRMJJkAOjQz3jyvMdLqD+y59sTiLRwUsaA0= Date: Mon, 12 Jan 2026 13:22:16 -0800 From: Andrew Morton To: Mathieu Desnoyers Cc: linux-kernel@vger.kernel.org, "Paul E. McKenney" , Steven Rostedt , Masami Hiramatsu , Dennis Zhou , Tejun Heo , Christoph Lameter , Martin Liu , David Rientjes , christian.koenig@amd.com, Shakeel Butt , 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 , linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, Yu Zhao , Roman Gushchin , Mateusz Guzik , Matthew Wilcox , Baolin Wang , Aboorva Devarajan 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> 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-Rspam-User: X-Stat-Signature: 4ywkycodp97bxwfigxgb4qyoc3wx69p1 X-Rspamd-Queue-Id: 4E539A0011 X-Rspamd-Server: rspam04 X-HE-Tag: 1768252939-238098 X-HE-Meta: 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 k0NigYXB Z6i1yHEQ/LeiE+URXHz/DpNRfCQ== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Mon, 12 Jan 2026 15:00:53 -0500 Mathieu Desnoyers 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.