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 CE2C3C5B56A for ; Tue, 11 Aug 2026 20:32:50 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id C407C6B00A4; Tue, 11 Aug 2026 16:32:49 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id BCA2C6B00A5; Tue, 11 Aug 2026 16:32:49 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B06DF6B00A6; Tue, 11 Aug 2026 16:32:49 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 8718E6B00A4 for ; Tue, 11 Aug 2026 16:32:49 -0400 (EDT) Received: from smtpin18.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay10.hostedemail.com (Postfix) with ESMTP id EEAE2C015A for ; Tue, 11 Aug 2026 20:32:48 +0000 (UTC) X-FDA: 85090137216.18.6A1387D Received: from out-178.mta0.migadu.com (out-178.mta0.migadu.com [91.218.175.178]) by imf30.hostedemail.com (Postfix) with ESMTP id 4E70080008 for ; Tue, 11 Aug 2026 20:32:47 +0000 (UTC) Authentication-Results: imf30.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=tjWLYDoX; spf=pass (imf30.hostedemail.com: domain of shakeel.butt@linux.dev designates 91.218.175.178 as permitted sender) smtp.mailfrom=shakeel.butt@linux.dev; dmarc=pass (policy=none) header.from=linux.dev ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1786480367; 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-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=5Q4GswXsYa23HjspIYsiXDi4Yy+VY6y3TioX/Zf5Hfc=; b=CycKaqiZ4EqdojEBZqPzohf12ma/QatZtcpSsfR7ETm7ZtEHAuOoABI8FjY94sYpEXTnAP y/KUD9Cdu4/EuFhZzK7NQt6N9f4CTnQM2/mApzONnulsHFrtoGvPwJdaIPJOHHxJiHw+RK T6V+Y2dx5r7rGIzEACiqk+In4faHs5Y= ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1786480367; b=YhXDt0PrBP//ctaB4FGFaduyVhtePFMLXQfhIuJd/tpE/Fac3RKdD2acXL/KdVlht8OHlh i4ZfDpr8oXlDceYsubMN51PBmNs1Xde4xi9sReecgi2t8Cca+4S8y07sQ7ylmUcu1gS6Ze j3Xfb50Scy0RMLzNjVZU8GyiQH7sVKk= ARC-Authentication-Results: i=1; imf30.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=tjWLYDoX; spf=pass (imf30.hostedemail.com: domain of shakeel.butt@linux.dev designates 91.218.175.178 as permitted sender) smtp.mailfrom=shakeel.butt@linux.dev; dmarc=pass (policy=none) header.from=linux.dev X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1786480366; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=5Q4GswXsYa23HjspIYsiXDi4Yy+VY6y3TioX/Zf5Hfc=; b=tjWLYDoXNvQDIAuW73cOM4BIp4z0OlAyBGCwh4bxtqlJ2fpxssixILMpQuX6ySxZ9dsGWm t0/Kmbh9XwTL5oDehABSwwMvkVmGStIVxebzieS00SwnrQ5eUz5rJet0XjbwZp90GrwcOb 9/zoKxC2UKg06CoyX/oIWVH1BJFijFg= From: Shakeel Butt To: Andrew Morton Cc: Michal Hocko , Johannes Weiner , Roman Gushchin , Muchun Song , David Hildenbrand , Lorenzo Stoakes , Kairui Song , Qi Zheng , Barry Song , Axel Rasmussen , Meta kernel team , linux-mm@kvack.org, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 7/9] memcg: remove the per-node soft limit tree fields Date: Tue, 11 Aug 2026 13:32:01 -0700 Message-ID: <20260811203203.3456029-8-shakeel.butt@linux.dev> In-Reply-To: <20260811203203.3456029-1-shakeel.butt@linux.dev> References: <20260811203203.3456029-1-shakeel.butt@linux.dev> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-Rspam-User: X-Stat-Signature: 797q9saxdmdsgcuy8wwh685wukbos8su X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 4E70080008 X-HE-Tag: 1786480367-66026 X-HE-Meta: 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 r0Olstww 3+lBb8i0WF32gOyoC/bJ6miO6pv+y7kw6LVG4FZgYLUB1QbkUm9LM3jU1BWQS3MZp++XCx++5A1TOr0SWd/VOZ5r2vPurzZgDHrRswy9zwdayfE56l3EW63/15dpXrMIbhdjjbvIN4DTlStqWpLyadmaTA6QCGLJOCTG12hxgV4UvZvL6ONAcFFpU930o0Mvz97odJT4r5O5x26s= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: tree_node, usage_in_excess and on_tree only existed for the soft limit rbtree. They also doubled as the buffer between the read-mostly head of struct mem_cgroup_per_node and its update-often tail, so replace them with the explicit padding that CONFIG_MEMCG_V1=n already used. Signed-off-by: Shakeel Butt --- include/linux/memcontrol.h | 13 ------------- 1 file changed, 13 deletions(-) diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 7b02f1b3bb88..ce24e04967d8 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -95,20 +95,7 @@ struct mem_cgroup_per_node { struct lruvec_stats *lruvec_stats; struct shrinker_info __rcu *shrinker_info; -#ifdef CONFIG_MEMCG_V1 - /* - * Memcg-v1 only stuff in middle as buffer between read mostly fields - * and update often fields to avoid false sharing. If v1 stuff is - * not present, an explicit padding is needed. - */ - - struct rb_node tree_node; /* RB tree node */ - unsigned long usage_in_excess;/* Set to the value by which */ - /* the soft limit is exceeded*/ - bool on_tree; -#else CACHELINE_PADDING(_pad1_); -#endif /* Fields which get updated often at the end. */ struct lruvec lruvec; -- 2.53.0-Meta