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 33E2FEA71A2 for ; Sun, 19 Apr 2026 15:56:05 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 087CC6B031A; Sun, 19 Apr 2026 11:56:04 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 038286B031C; Sun, 19 Apr 2026 11:56:03 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id E68FB6B031D; Sun, 19 Apr 2026 11:56:03 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id CE01D6B031A for ; Sun, 19 Apr 2026 11:56:03 -0400 (EDT) Received: from smtpin21.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id 960371607D9 for ; Sun, 19 Apr 2026 15:56:03 +0000 (UTC) X-FDA: 84675756606.21.6213F3A Received: from mail-m82144.xmail.ntesmail.com (mail-m82144.xmail.ntesmail.com [156.224.82.144]) by imf28.hostedemail.com (Postfix) with ESMTP id 207FFC0009 for ; Sun, 19 Apr 2026 15:56:00 +0000 (UTC) Authentication-Results: imf28.hostedemail.com; dkim=none; spf=pass (imf28.hostedemail.com: domain of zhen.ni@easystack.cn designates 156.224.82.144 as permitted sender) smtp.mailfrom=zhen.ni@easystack.cn; dmarc=pass (policy=none) header.from=easystack.cn ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1776614161; a=rsa-sha256; cv=none; b=oKsZHp7dQ60UPC315uKHdZpMOD0fJveKm6dKy9dquNToK9ktxAuEhK476/atOSHW4po0oJ jUht+9OaZwfcsii8pJPrggk9jE2GreX9hWVQN3qcBWArVWxT58LoitmGjMvML5TZxJnxhT /+M++M7FUR1B7sOtbEb4PwAFtRd1A2k= ARC-Authentication-Results: i=1; imf28.hostedemail.com; dkim=none; spf=pass (imf28.hostedemail.com: domain of zhen.ni@easystack.cn designates 156.224.82.144 as permitted sender) smtp.mailfrom=zhen.ni@easystack.cn; dmarc=pass (policy=none) header.from=easystack.cn ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1776614161; 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; bh=Wx9OlUC0TK8oBwuCTKrsbiipTUHboSxxJb75pN7wKMY=; b=M6rGQ1sv19EmYawf5g3m+UAsG1Bt22NHYkOtYjT4SoafyvKun5gGcKEC6jgEBgv+zUKuPz CyWwzujbv5it9b/lq7mcTg7po6kyT8nDQvH7ViaD58hmPD7SRd1K0L2tASOSZVoo8qGUNP U/d5YnnVr8umywfA4hbVgSM2pwcffPE= Received: from localhost.localdomain (unknown [IPV6:2409:8a20:ef7:a5b4:8810:8f74:8c26:2]) by smtp.qiye.163.com (Hmail) with ESMTP id 1918e52a9; Sun, 19 Apr 2026 23:55:55 +0800 (GMT+08:00) From: Zhen Ni To: akpm@linux-foundation.org, vbabka@kernel.org Cc: surenb@google.com, mhocko@suse.com, jackmanb@google.com, hannes@cmpxchg.org, ziy@nvidia.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Zhen Ni Subject: [PATCH v2 1/3] mm/page_owner: add filter infrastructure Date: Sun, 19 Apr 2026 23:55:38 +0800 Message-Id: <20260419155540.376847-2-zhen.ni@easystack.cn> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20260419155540.376847-1-zhen.ni@easystack.cn> References: <20260419155540.376847-1-zhen.ni@easystack.cn> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-HM-Tid: 0a9da674a44d0229kunma1b4aa74234e87 X-HM-MType: 1 X-HM-Spam-Status: e1kfGhgUHx5ZQUpXWQgPGg8OCBgUHx5ZQUlOS1dZFg8aDwILHllBWSg2Ly tZV1koWUFJQjdXWS1ZQUlXWQ8JGhUIEh9ZQVlDHkNKVkgdTEwYHkhPTkJCS1YVFAkWGhdVGRETFh oSFyQUDg9ZV1kYEgtZQVlJT0tCQUMaSUtBHh1MQRpOGU9BQ0NKS0FDHUxPQUMYSU1BSVlXWRYaDx IVHRRZQVlPS0hVSktJT09PSFVKS0tVSkJLS1kG X-Rspamd-Server: rspam10 X-Stat-Signature: sbhmr1k4r5itccsrr7j537r1b5a849uo X-Rspam-User: X-Rspamd-Queue-Id: 207FFC0009 X-HE-Tag: 1776614160-501044 X-HE-Meta: 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 0WWKC/oq rBix7HUlrGqHS1Khvm4jCFq6zXjS8Ef/QT/128Zydz/AThRnAem650/UZcz+J2pF50KnmDK5SRy5UJe0cWZq6+YvttmPddcxnaRkao22bp8nos1mdan4opKr+ZKAplrDgNo6d65C37z+WZJqticWsxJ55lySc+HMJOumbAZaguREyOY9fAX7OySBnJCqMp1+C4D6ycjhwVKLG5j2li9F5v3lX3A== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Add data structure for page_owner filtering functionality and create debugfs directory for filter controls. This adds: - enum page_owner_print_mode with values for full_stack and stack_handle - struct page_owner_filter with print_mode and nid_mask fields - Static owner_filter instance initialized with default values - page_owner_filter debugfs directory The filter infrastructure will be used to add print_mode and NUMA node filtering capabilities in subsequent commits. Link: https://lore.kernel.org/linux-mm/20260417154638.22370-2-zhen.ni@easystack.cn/ Suggested-by: Zi Yan Signed-off-by: Zhen Ni --- Changes in v2: - Use enum page_owner_print_mode instead of bool 'compact' for better clarity - Use nodemask_t instead of int 'nid' to support multi-node filtering --- mm/page_owner.c | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) diff --git a/mm/page_owner.c b/mm/page_owner.c index 8178e0be557f..5884d883837e 100644 --- a/mm/page_owner.c +++ b/mm/page_owner.c @@ -54,6 +54,21 @@ struct stack_print_ctx { u8 flags; }; +enum page_owner_print_mode { + PAGE_OWNER_PRINT_FULL_STACK, + PAGE_OWNER_PRINT_STACK_HANDLE, +}; + +struct page_owner_filter { + enum page_owner_print_mode print_mode; + nodemask_t nid_mask; +}; + +static struct page_owner_filter owner_filter = { + .print_mode = PAGE_OWNER_PRINT_FULL_STACK, + .nid_mask = NODE_MASK_NONE, +}; + static bool page_owner_enabled __initdata; DEFINE_STATIC_KEY_FALSE(page_owner_inited); @@ -973,7 +988,7 @@ DEFINE_SIMPLE_ATTRIBUTE(page_owner_threshold_fops, &page_owner_threshold_get, static int __init pageowner_init(void) { - struct dentry *dir; + struct dentry *dir, *filter_dir; if (!static_branch_unlikely(&page_owner_inited)) { pr_info("page_owner is disabled\n"); @@ -981,6 +996,9 @@ static int __init pageowner_init(void) } debugfs_create_file("page_owner", 0400, NULL, NULL, &page_owner_fops); + + filter_dir = debugfs_create_dir("page_owner_filter", NULL); + dir = debugfs_create_dir("page_owner_stacks", NULL); debugfs_create_file("show_stacks", 0400, dir, (void *)(STACK_PRINT_FLAG_STACK | -- 2.20.1