From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-m49236.qiye.163.com (mail-m49236.qiye.163.com [45.254.49.236]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BFA3428C5B1 for ; Fri, 17 Apr 2026 16:02:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.254.49.236 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776441741; cv=none; b=gAjSvgcR5p0CdQPoDHd4yyr2778OeqP0BOTEjiQxPDwEKvBHVobpmMQgPMl075Bk2496dfema4tgsNAbkvR6rFyJbd7B0S0ZrQ+n8J7lLvXPZcNNeCVFcRGHO2lHuATYGuCH5Wt2Y8unVEj3S0qaJbR7GTP8nndcyTw966D+IQE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776441741; c=relaxed/simple; bh=gbICEADcbcSDm8CPygt4LB7CqNyBedGPTa6kFVV9lsY=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=QfVofk6jovegTnxZ9WayEqQlLPNqEj+Yxog18750yz6jHen7kj63N++SlUnWAcRMz8X2hFT9sDjwdLR5donQPU7jPAulD5Sk4oGqr2kQHgyFE366xfc5ptLrTDWlaI2uovrvg9BmDT4U70EIPRlie5kx6cMu8FwOI4YLnWyaQnQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=easystack.cn; spf=pass smtp.mailfrom=easystack.cn; arc=none smtp.client-ip=45.254.49.236 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=easystack.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=easystack.cn Received: from localhost.localdomain (unknown [IPV6:2409:8a20:ef7:a5b4:8810:8f74:8c26:2]) by smtp.qiye.163.com (Hmail) with ESMTP id 190e229f6; Fri, 17 Apr 2026 23:46:50 +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 1/3] mm/page_owner: add filter infrastructure Date: Fri, 17 Apr 2026 23:46:36 +0800 Message-Id: <20260417154638.22370-2-zhen.ni@easystack.cn> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20260417154638.22370-1-zhen.ni@easystack.cn> References: <20260417154638.22370-1-zhen.ni@easystack.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-HM-Tid: 0a9d9c1f9a3d0229kunm7c3615e318e59b X-HM-MType: 1 X-HM-Spam-Status: e1kfGhgUHx5ZQUpXWQgPGg8OCBgUHx5ZQUlOS1dZFg8aDwILHllBWSg2Ly tZV1koWUFJQjdXWS1ZQUlXWQ8JGhUIEh9ZQVlCQktDVkodGRhNTU0dTEtLTFYVFAkWGhdVGRETFh oSFyQUDg9ZV1kYEgtZQVlJT0tCQUMaSUtBHh1MQRpOGU9BQ0NKS0FDHUxPQUMYSU1BSVlXWRYaDx IVHRRZQVlPS0hVSktJT09PSFVKS0tVSkJLS1kG Add data structure for page_owner filtering functionality and create debugfs directory for filter controls. This adds: - struct page_owner_filter with compact and nid fields - Static owner_filter instance initialized with default values - page_owner_filter debugfs directory The filter infrastructure will be used to add compact mode and NUMA node filtering capabilities in subsequent commits. Signed-off-by: Zhen Ni --- mm/page_owner.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/mm/page_owner.c b/mm/page_owner.c index 8178e0be557f..6811439bf9e4 100644 --- a/mm/page_owner.c +++ b/mm/page_owner.c @@ -54,6 +54,16 @@ struct stack_print_ctx { u8 flags; }; +struct page_owner_filter { + bool compact; + int nid; +}; + +static struct page_owner_filter owner_filter = { + .compact = false, + .nid = -1, +}; + static bool page_owner_enabled __initdata; DEFINE_STATIC_KEY_FALSE(page_owner_inited); @@ -973,7 +983,7 @@ 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 +991,9 @@ 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