From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 C3A202EC0A4 for ; Tue, 28 Apr 2026 14:17:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777385825; cv=none; b=aDMN0uSV9W3HLFqgpjqP0TCL6qtzWMPb3HGz/uWx61BngX7atIfJNMZLO6Bd22jJbKgjYiRa6oqXZHKELsG5/sUZ4ZI+StitnkK19mVdLX2nYsffRQeKSbJqqRYVDv96nrDb3HpsIpeMX07FfFWMEuEqvGbdTbH/aDQ4X6xwlBo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777385825; c=relaxed/simple; bh=hSzmcOxi9y+B696RjA/G+yClygAX3XmyO2rRuMehYmw=; h=Date:To:From:Subject:Message-Id; b=mEnd+UOe9WAICEqw/nLMqtSSfPQpNZBIt+QFIQ7j9NVbbAGUMQkNmheBYZUceHSoq4nH9ZBvl89feY5qxse0x5Blv8UJ+idx6hLm2VnKIj9QDMD3+yBZKHaTky7dUH25ajSAd4GVwBmqXcXwsHn2S4WjBeCA8GYfp8u8qckG2G4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=D6BcRw1Q; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="D6BcRw1Q" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 50B0AC2BCAF; Tue, 28 Apr 2026 14:17:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1777385825; bh=hSzmcOxi9y+B696RjA/G+yClygAX3XmyO2rRuMehYmw=; h=Date:To:From:Subject:From; b=D6BcRw1QdTilakhkkUtKs6As+4zx0AXk+/8lmXYQ5a8LVjQJKVCqLafu3tuegG7Nw yyVA0fJ1q57/1KfPPlxm/GIBkDTz+uzJEGVxHrTAJ75uMObnYGTlIZK7N1dIOCn/bW PzqrlDhyqd/KtcEkNhY9AgicB3yoijOCVKLYRKHg= Date: Tue, 28 Apr 2026 07:17:04 -0700 To: mm-commits@vger.kernel.org,ziy@nvidia.com,vbabka@kernel.org,surenb@google.com,mhocko@suse.com,jackmanb@google.com,hannes@cmpxchg.org,zhen.ni@easystack.cn,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-page_owner-add-filter-infrastructure.patch added to mm-new branch Message-Id: <20260428141705.50B0AC2BCAF@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: mm/page_owner: add filter infrastructure has been added to the -mm mm-new branch. Its filename is mm-page_owner-add-filter-infrastructure.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-page_owner-add-filter-infrastructure.patch This patch will later appear in the mm-new branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Note, mm-new is a provisional staging ground for work-in-progress patches, and acceptance into mm-new is a notification for others take notice and to finish up reviews. Please do not hesitate to respond to review feedback and post updated versions to replace or incrementally fixup patches in mm-new. The mm-new branch of mm.git is not included in linux-next If a few days of testing in mm-new is successful, the patch will me moved into mm.git's mm-unstable branch, which is included in linux-next Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via various branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there most days ------------------------------------------------------ From: Zhen Ni Subject: mm/page_owner: add filter infrastructure Date: Tue, 28 Apr 2026 15:11:09 +0800 Patch series "mm/page_owner: add filter infrastructure for print_mode and NUMA filtering", v3. This patch series introduces filtering capabilities to the page_owner feature to address storage and performance challenges in production environments. This patch (of 4): 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/20260428071112.1420380-1-zhen.ni@easystack.cn Link: https://lore.kernel.org/linux-mm/20260417154638.22370-2-zhen.ni@easystack.cn/ Link: https://lore.kernel.org/20260428071112.1420380-2-zhen.ni@easystack.cn Signed-off-by: Zhen Ni Suggested-by: Zi Yan Cc: Brendan Jackman Cc: Johannes Weiner Cc: Michal Hocko Cc: Suren Baghdasaryan Cc: Vlastimil Babka Cc: Zhen Ni Signed-off-by: Andrew Morton --- mm/page_owner.c | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) --- a/mm/page_owner.c~mm-page_owner-add-filter-infrastructure +++ a/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_thres 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 | _ Patches currently in -mm which might be from zhen.ni@easystack.cn are mm-page_owner-add-filter-infrastructure.patch mm-page_owner-add-print_mode-filter.patch mm-page_owner-add-numa-node-filter-with-nodelist-support.patch mm-page_owner-document-page_owner-filter-features.patch mm-page_owner-fix-%pgp-format-specifier-argument-type.patch