From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 91C39C83006 for ; Wed, 29 Apr 2020 06:00:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 704BC206D6 for ; Wed, 29 Apr 2020 06:00:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726625AbgD2GAX (ORCPT ); Wed, 29 Apr 2020 02:00:23 -0400 Received: from lgeamrelo11.lge.com ([156.147.23.51]:40329 "EHLO lgeamrelo11.lge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726353AbgD2GAX (ORCPT ); Wed, 29 Apr 2020 02:00:23 -0400 X-Greylist: delayed 1801 seconds by postgrey-1.27 at vger.kernel.org; Wed, 29 Apr 2020 02:00:22 EDT Received: from unknown (HELO lgeamrelo02.lge.com) (156.147.1.126) by 156.147.23.51 with ESMTP; 29 Apr 2020 14:30:20 +0900 X-Original-SENDERIP: 156.147.1.126 X-Original-MAILFROM: ch0.han@lge.com Received: from unknown (HELO localhost.localdomain) (10.177.221.57) by 156.147.1.126 with ESMTP; 29 Apr 2020 14:30:20 +0900 X-Original-SENDERIP: 10.177.221.57 X-Original-MAILFROM: ch0.han@lge.com From: Changhee Han To: akpm@linux-foundation.org Cc: vbabka@suse.cz, iamjoonsoo.kim@lge.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-doc@vger.kernel.org, corbet@lwn.net, ch0.han@lge.com Subject: [PATCH] tools/vm/page_owner_sort: filter out unneeded line Date: Wed, 29 Apr 2020 14:29:40 +0900 Message-Id: <20200429052940.16968-1-ch0.han@lge.com> X-Mailer: git-send-email 2.17.1 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org To see a sorted result from page owner, it needs a tiresome preprocessing work before running page_owner_sort. This patch simply filters out a line which starts with "PFN" while reading page owner report. Signed-off-by: Changhee Han --- Documentation/vm/page_owner.rst | 3 +-- tools/vm/page_owner_sort.c | 5 +++-- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/Documentation/vm/page_owner.rst b/Documentation/vm/page_owner.rst index 0ed5ab8c7ab4..079f3f8c4784 100644 --- a/Documentation/vm/page_owner.rst +++ b/Documentation/vm/page_owner.rst @@ -83,8 +83,7 @@ Usage 4) Analyze information from page owner:: cat /sys/kernel/debug/page_owner > page_owner_full.txt - grep -v ^PFN page_owner_full.txt > page_owner.txt - ./page_owner_sort page_owner.txt sorted_page_owner.txt + ./page_owner_sort page_owner_full.txt sorted_page_owner.txt See the result about who allocated each page in the ``sorted_page_owner.txt``. diff --git a/tools/vm/page_owner_sort.c b/tools/vm/page_owner_sort.c index d3a8755c039c..85eb65ea16d3 100644 --- a/tools/vm/page_owner_sort.c +++ b/tools/vm/page_owner_sort.c @@ -4,8 +4,7 @@ * * Example use: * cat /sys/kernel/debug/page_owner > page_owner_full.txt - * grep -v ^PFN page_owner_full.txt > page_owner.txt - * ./page_owner_sort page_owner.txt sorted_page_owner.txt + * ./page_owner_sort page_owner_full.txt sorted_page_owner.txt * * See Documentation/vm/page_owner.rst */ @@ -38,6 +37,8 @@ int read_block(char *buf, int buf_size, FILE *fin) while (buf_end - curr > 1 && fgets(curr, buf_end - curr, fin)) { if (*curr == '\n') /* empty line */ return curr - buf; + if (!strncmp(curr, "PFN", 3)) + continue; curr += strlen(curr); } -- 2.17.1