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 4B1CD3F23DD for ; Wed, 29 Apr 2026 12:11:34 +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=1777464694; cv=none; b=bCDhTy/4XSxzhqjV54dXKmykO/d/Uvb5ngvP0/6kIhXr56IXZc8E54lZO8lcvqQaZ/3C0qCBIHgSUOJUoL2JiFSntoIAUQmJ01whBgTUfmBpthnkaJ6NPsuzxnJQNGY7Md5Hgm01ZbCBH9GWexNoFaDQJsRGRfLkiIhjbiPiYS8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777464694; c=relaxed/simple; bh=llL4Id5RGBcmEEuojAZAZJGsPk17qjU5001wtsgtB28=; h=Date:To:From:Subject:Message-Id; b=W1yOMpj7e+WsOe5QI6Gye5ApDseG78iUNO8OT0ZSFGTE7IkvzpQVCwNhAj/NMRVuBHMFGU1PRoeaGInwDEddSkJo0XchtLb9ddi08mt/8KVzqPGHN/k9XIffqNqjOV9hPjYpzqiLtMM2c/w6VZbGCKXqqOrYOBYMZnCctwHwWE8= 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=FAhpQqrq; 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="FAhpQqrq" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D0FC0C19425; Wed, 29 Apr 2026 12:11:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1777464693; bh=llL4Id5RGBcmEEuojAZAZJGsPk17qjU5001wtsgtB28=; h=Date:To:From:Subject:From; b=FAhpQqrq3emnrurGgxtV/9ZbVWvvlo4vuWX7rC3exmLGc3Y2nXOKWoAbC8WBkIYG1 1oxrlLEQyCaI5EG1KTYz6uoY5b8Rv8jBzRuTgyYHyB5p1+Zva1NNuh1J1tID0+sRsV 0cg7I+2X4B/r84UoxQHmYHdx9ydLj/Pm3DZJoFhM= Date: Wed, 29 Apr 2026 05:11:33 -0700 To: mm-commits@vger.kernel.org,zhen.ni@easystack.cn,akpm@linux-foundation.org From: Andrew Morton Subject: [to-be-updated] mm-page_owner-add-numa-node-filter-with-nodelist-support.patch removed from -mm tree Message-Id: <20260429121133.D0FC0C19425@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: mm/page_owner: add NUMA node filter with nodelist support has been removed from the -mm tree. Its filename was mm-page_owner-add-numa-node-filter-with-nodelist-support.patch This patch was dropped because an updated version will be issued ------------------------------------------------------ From: Zhen Ni Subject: mm/page_owner: add NUMA node filter with nodelist support Date: Tue, 28 Apr 2026 15:11:11 +0800 Add NUMA node filtering functionality to page_owner to allow filtering pages by specific NUMA node(s) using nodelist format. The filter allows users to focus on pages from specific NUMA nodes, which is useful for NUMA-aware memory allocation analysis and debugging. Supported input formats: - Single node: echo "2" > nid - Multiple nodes: echo "0,2,3" > nid - Node range: echo "0-3" > nid - Mixed format: echo "0,2-4,7" > nid - Disable filter: echo "-1" > nid Link: https://lore.kernel.org/linux-mm/20260417154638.22370-4-zhen.ni@easystack.cn/ Link: https://lore.kernel.org/linux-mm/20260419155540.376847-4-zhen.ni@easystack.cn/ Link: https://lore.kernel.org/20260428071112.1420380-4-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 Signed-off-by: Andrew Morton --- mm/page_owner.c | 82 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 82 insertions(+) --- a/mm/page_owner.c~mm-page_owner-add-numa-node-filter-with-nodelist-support +++ a/mm/page_owner.c @@ -685,6 +685,7 @@ read_page_owner(struct file *file, char struct page_ext *page_ext; struct page_owner *page_owner; depot_stack_handle_t handle; + nodemask_t mask; if (!static_branch_unlikely(&page_owner_inited)) return -EINVAL; @@ -698,6 +699,8 @@ read_page_owner(struct file *file, char while (!pfn_valid(pfn) && (pfn & (MAX_ORDER_NR_PAGES - 1)) != 0) pfn++; + mask = owner_filter.nid_mask; + /* Find an allocated page */ for (; pfn < max_pfn; pfn++) { /* @@ -730,6 +733,14 @@ read_page_owner(struct file *file, char if (unlikely(!page_ext)) continue; + /* NUMA node filter using bitmask */ + if (!nodes_empty(mask)) { + int nid = page_to_nid(page); + + if (!node_isset(nid, mask)) + goto ext_put_continue; + } + /* * Some pages could be missed by concurrent allocation or free, * because we don't hold the zone lock. @@ -1009,6 +1020,75 @@ DEFINE_SIMPLE_ATTRIBUTE(page_owner_print &page_owner_print_mode_get, &page_owner_print_mode_set, "%lld"); +static ssize_t nid_filter_write(struct file *file, + const char __user *buf, + size_t count, loff_t *ppos) +{ + char *kbuf; + nodemask_t mask; + int ret; + int val; + + /* + * Limit input size to handle worst-case nodelist (all nodes). + * Worst case per node: ",NNNNN" (comma + 5-digit node number) = 6 bytes. + * Formula: 100 bytes overhead + 6 * MAX_NUMNODES + */ + if (count > (100 + 6 * MAX_NUMNODES)) + return -EINVAL; + + kbuf = kmalloc(count + 1, GFP_KERNEL); + if (!kbuf) + return -ENOMEM; + + if (copy_from_user(kbuf, buf, count)) { + ret = -EFAULT; + goto out_free; + } + kbuf[count] = '\0'; + + /* Support: "-1" to clear, or nodelist format like "0", "0,2", "0-3" */ + if (kstrtoint(kbuf, 10, &val) == 0 && val == -1) + nodes_clear(mask); + else if (nodelist_parse(kbuf, mask)) { + ret = -EINVAL; + goto out_free; + } + + owner_filter.nid_mask = mask; + ret = count; + +out_free: + kfree(kbuf); + return ret; +} + +static int nid_filter_show(struct seq_file *m, void *v) +{ + nodemask_t mask = owner_filter.nid_mask; + + if (nodes_empty(mask)) + seq_puts(m, "-1\n"); + else + seq_printf(m, "%*pbl\n", nodemask_pr_args(&mask)); + + return 0; +} + +static int nid_filter_open(struct inode *inode, struct file *file) +{ + return single_open(file, nid_filter_show, NULL); +} + +static const struct file_operations nid_filter_fops = { + .owner = THIS_MODULE, + .open = nid_filter_open, + .read = seq_read, + .llseek = seq_lseek, + .write = nid_filter_write, + .release = single_release, +}; + static int __init pageowner_init(void) { @@ -1024,6 +1104,8 @@ static int __init pageowner_init(void) filter_dir = debugfs_create_dir("page_owner_filter", NULL); debugfs_create_file("print_mode", 0600, filter_dir, NULL, &page_owner_print_mode_fops); + debugfs_create_file("nid", 0600, filter_dir, NULL, + &nid_filter_fops); dir = debugfs_create_dir("page_owner_stacks", NULL); debugfs_create_file("show_stacks", 0400, dir, _ Patches currently in -mm which might be from zhen.ni@easystack.cn are mm-page_owner-fix-%pgp-format-specifier-argument-type.patch