From patchwork Wed Apr 29 05:29:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Changhee Han X-Patchwork-Id: 11516031 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1201981 for ; Wed, 29 Apr 2020 05:30:27 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id A2A7D2076B for ; Wed, 29 Apr 2020 05:30:26 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A2A7D2076B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lge.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id ACB9D8E0005; Wed, 29 Apr 2020 01:30:25 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id A55328E0001; Wed, 29 Apr 2020 01:30:25 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 91D1D8E0005; Wed, 29 Apr 2020 01:30:25 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0027.hostedemail.com [216.40.44.27]) by kanga.kvack.org (Postfix) with ESMTP id 7AACE8E0001 for ; Wed, 29 Apr 2020 01:30:25 -0400 (EDT) Received: from smtpin27.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 3389F5827 for ; Wed, 29 Apr 2020 05:30:25 +0000 (UTC) X-FDA: 76759767210.27.chalk76_20a3f9cd2ad3c X-Spam-Summary: 1,0,0,,d41d8cd98f00b204,ch0.han@lge.com,,RULES_HIT:30054:30070:30075,0,RBL:156.147.23.51:@lge.com:.lbl8.mailshell.net-64.10.201.10 62.18.1.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:24,LUA_SUMMARY:none X-HE-Tag: chalk76_20a3f9cd2ad3c X-Filterd-Recvd-Size: 2826 Received: from lgeamrelo11.lge.com (lgeamrelo11.lge.com [156.147.23.51]) by imf26.hostedemail.com (Postfix) with ESMTP for ; Wed, 29 Apr 2020 05:30:23 +0000 (UTC) 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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); }