From nobody Tue Dec 16 04:34:14 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C4591C3DA7A for ; Thu, 5 Jan 2023 14:26:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233462AbjAEOZf (ORCPT ); Thu, 5 Jan 2023 09:25:35 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36066 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233385AbjAEOZG (ORCPT ); Thu, 5 Jan 2023 09:25:06 -0500 Received: from 163.com (m12.mail.163.com [220.181.12.216]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 2665F559C3 for ; Thu, 5 Jan 2023 06:25:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=Date:From:Subject:Content-Type:MIME-Version: Message-ID; bh=3GW9Z5cfgz8pMeZ04XtLdblMO6HBSQ4K2QmhpdPFwtI=; b=i JDbvGMtGWRwMnS4DfkqFXRRnTNRQSv5Bs7neods8M3lbHIf2rrGdlaKKWh6e68w0 ofNeh3J9acWZ540IuKOqXJvHLj7k7w4CVs6iGvXy9NT2xQJLokwEtVUF1v6Rf924 VfVGQWza33XgLDRL+qKZuuBq2lhf17dahL9oaeVfNg= Received: from 00107082$163.com ( [222.64.110.75] ) by ajax-webmail-wmsvr57 (Coremail) ; Thu, 5 Jan 2023 22:24:55 +0800 (CST) X-Originating-IP: [222.64.110.75] Date: Thu, 5 Jan 2023 22:24:55 +0800 (CST) From: "David Wang" <00107082@163.com> To: linux-kernel@vger.kernel.org Subject: [proc/vmstat]set nr_kernel_stack in vmstat to nr_threads X-Priority: 3 X-Mailer: Coremail Webmail Server Version XT5.0.14 build 20220708(c4627114) Copyright (c) 2002-2023 www.mailtech.cn 163com X-NTES-SC: AL_QuycAPWZt04i4ymZZekZnEoUjug3W8K5v/kk3Y9VOp80uSrB3DkQRmFEH2bS4cijKz+2rga6dTpM48dRVJlcTa41Z5AdEw8Ny3ZhjGVrE2Ww Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Message-ID: <41beab3a.4f68.1858252166b.Coremail.00107082@163.com> X-Coremail-Locale: zh_CN X-CM-TRANSID: _____wBnasq43bZjeo4CAA--.15258W X-CM-SenderInfo: qqqrilqqysqiywtou0bp/1tbivBftqmASalA6wwAAsd X-Coremail-Antispam: 1U5529EdanIXcx71UUUUU7vcSsGvfC2KfnxnUU== Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" nr_kernel_stack in /proc/vmstat is very confusing, its value is now the sam= e as KernelStack in /proc/meminfo, indicating kernel stack memory usage in KB. It would be helpful to expose = a stat about the number of kernel thread, (the sysinfo syscall return a proc number with type U16, overflow would hap= pen). This patch set nr_kernel_stack in /proc/vmstat to a value defined by a global variable nr_threads. -- diff --git a/mm/vmstat.c b/mm/vmstat.c index 1ea6a5ce1c41..0040beaa1b24 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -28,6 +28,7 @@ #include #include #include +#include =20 #include "internal.h" =20 @@ -1831,9 +1832,20 @@ static int vmstat_show(struct seq_file *m, void *arg) { unsigned long *l =3D arg; unsigned long off =3D l - (unsigned long *)m->private; - + static long nks_i =3D -1; // index for nr_kernel_stack + if (nks_i < 0 && nks_i > -128) { + if (strcmp("nr_kernel_stack", vmstat_text[off]) =3D=3D 0) { + nks_i =3D off; + } else { + nks_i--; + } + } seq_puts(m, vmstat_text[off]); - seq_put_decimal_ull(m, " ", *l); + if (nks_i =3D=3D off) { + seq_put_decimal_ull(m, " ", nr_threads); + } else { + seq_put_decimal_ull(m, " ", *l); + } seq_putc(m, '\n'); =20 if (off =3D=3D NR_VMSTAT_ITEMS - 1) { -- David