From nobody Thu Oct 2 10:39:02 2025 Received: from out-183.mta1.migadu.com (out-183.mta1.migadu.com [95.215.58.183]) (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 8CF4123315A for ; Thu, 18 Sep 2025 07:17:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.183 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758179878; cv=none; b=oD03RY6yAOwbh8Bmdsb/1qtDBHAO5mZIvj9ESX7OaaVhSmDbV+EfgjqR0Xn6WTo7ItIiPKUNSqrOWvBqOwYHemyonEgux24JKu6EogPbWqQtqKJcOIjTxVVzzDL8oqJAL2NY6wrlsgPUY7zmAG9PhjYICkkdQ6pCsS4RPnuAJ/w= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758179878; c=relaxed/simple; bh=g6KpOQLmw0L2SyJnoN9qB9ROZzSlgYe341rQrO83gjk=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=RxkXX4BB1MkdgHtLjAjTi0xBI61YsYk+s5LfWrrdbn/sdpq/2OtEY/b2VEeke2UlLUzTs4p33tpPMBwcwWsCKFMQCnPJb6Rtdg67JjXSMKsKF2l8+u1sc3O3fZnqjRArokSLC7KEw4CEGbvnNRLAzedggQEgLJsUcZzAWux17DY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=m3iQCM2T; arc=none smtp.client-ip=95.215.58.183 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="m3iQCM2T" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1758179874; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=njN97PvBPLC4bDZRs8q/T0cTu4eF2v+Wk3jFZfVWHnw=; b=m3iQCM2TOJA+kmwLLav6k0tpHUtNL0IBO87TXdQfOVw4AG2EYcVb6OGbJ0WG7CRdyF/bFr a51psNoJIanaLFs9imtLLnJBQyM03SrVwmYeQ+MxEPlJkoyH4IjcuBBbQqECJAbWNNzNYr MvZH82gNkKZ0m2BkQ1C43r9Tpr8o7ec= From: Ye Liu To: Andrew Morton , David Hildenbrand Cc: Ye Liu , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH] mm/vmstat: add header line to /proc/buddyinfo output Date: Thu, 18 Sep 2025 15:17:40 +0800 Message-ID: <20250918071741.526280-1-ye.liu@linux.dev> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Migadu-Flow: FLOW_OUT Content-Type: text/plain; charset="utf-8" From: Ye Liu Add a header line to /proc/buddyinfo that shows the order numbers for better readability and clarity. Before: Node 0, zone DMA 0 0 0 0 0 0 0 ... Node 0, zone DMA32 5 8 6 6 7 5 8 ... Node 0, zone Normal 1113 351 138 65 38 31 25 ... After: Free pages per order 0 1 2 3 4 5 6 ... Node 0, zone DMA 0 0 0 0 0 0 0 ... Node 0, zone DMA32 5 8 6 6 7 5 8 ... Node 0, zone Normal 1113 351 138 65 38 31 25 ... Signed-off-by: Ye Liu --- mm/vmstat.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/mm/vmstat.c b/mm/vmstat.c index bb09c032eecf..e9606457ab91 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -1574,7 +1574,14 @@ static void frag_show_print(struct seq_file *m, pg_d= ata_t *pgdat, */ static int frag_show(struct seq_file *m, void *arg) { + int order; pg_data_t *pgdat =3D (pg_data_t *)arg; + /* Print header */ + seq_printf(m, "%-21s ", "Free pages per order"); + for (order =3D 0; order < NR_PAGE_ORDERS; ++order) + seq_printf(m, "%6d ", order); + seq_putc(m, '\n'); + walk_zones_in_node(m, pgdat, true, false, frag_show_print); return 0; } --=20 2.43.0