From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-m3286.qiye.163.com (mail-m3286.qiye.163.com [220.197.32.86]) (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 B5DE7282F23 for ; Sun, 19 Apr 2026 17:11:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=220.197.32.86 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776618711; cv=none; b=ZydQwvQ/wQuOVLRXb7zQGEiRw4IM8IwhWqSpiVbkfU8U6lI/gjjJD64oChFONiSFNeVQFtEv2JFRiy+3IAbYxDIkKSxabcmvRjJ3ow4xr8E3ZGCBFKFQpGbnaYTWGSWLKyzhlLgv037aGmvnkcCk9/J4+ARHECobma7R23wYhvs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776618711; c=relaxed/simple; bh=fxYFAWqUqLHwoh5Z1DU+a41FxujT0uR6Meu0PIzAxdA=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=S3ZNVJrwCG0GB+0vUPCXCHYNXp5ytB/O0MK9xsXulBNv9ybW0b+YvkjMQMMRbLaoMIYKKpYPvEQFcSt/eCIG3cbx1ccvXfDiniyBiu6ovGXchlXkkFVHaPe3Pgg55ZFORFBUM5ndZgGuzgZqA/AuHHC2Zj3Bg39AeJezM6dr2G0= 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=220.197.32.86 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 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> 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: 0a9da674a44d0229kunma1b4aa74234e87 X-HM-MType: 1 X-HM-Spam-Status: e1kfGhgUHx5ZQUpXWQgPGg8OCBgUHx5ZQUlOS1dZFg8aDwILHllBWSg2Ly tZV1koWUFJQjdXWS1ZQUlXWQ8JGhUIEh9ZQVlDHkNKVkgdTEwYHkhPTkJCS1YVFAkWGhdVGRETFh oSFyQUDg9ZV1kYEgtZQVlJT0tCQUMaSUtBHh1MQRpOGU9BQ0NKS0FDHUxPQUMYSU1BSVlXWRYaDx IVHRRZQVlPS0hVSktJT09PSFVKS0tVSkJLS1kG 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