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=-3.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 5DC50C433DF for ; Wed, 3 Jun 2020 23:03:25 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 204B9221FE for ; Wed, 3 Jun 2020 23:03:25 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="VDx7hPku" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 204B9221FE Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id BBDB3280080; Wed, 3 Jun 2020 19:03:24 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id B6ED228006C; Wed, 3 Jun 2020 19:03:24 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id AAA61280080; Wed, 3 Jun 2020 19:03:24 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 92FD228006C for ; Wed, 3 Jun 2020 19:03:24 -0400 (EDT) Received: from smtpin07.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 5A9CC180AD806 for ; Wed, 3 Jun 2020 23:03:24 +0000 (UTC) X-FDA: 76889428728.07.crown60_3ac9e1b074416 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin07.hostedemail.com (Postfix) with ESMTP id 3D15A1803F9AA for ; Wed, 3 Jun 2020 23:03:24 +0000 (UTC) X-HE-Tag: crown60_3ac9e1b074416 X-Filterd-Recvd-Size: 3458 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf30.hostedemail.com (Postfix) with ESMTP for ; Wed, 3 Jun 2020 23:03:23 +0000 (UTC) Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id DB166221FD; Wed, 3 Jun 2020 23:03:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591225403; bh=LIONEK6YVQpOTVhcftFJ2SgRC5fWMkYfs2+rwRZ1gfM=; h=Date:From:To:Subject:In-Reply-To:From; b=VDx7hPku0Jo7PiZEpCxZBcxKCMqE+JU8aZJMyHgfocBSRccd4UP+JTYC7neQfwE0S hEFkzEmWUXe+hp+ykA/XGLVz0aHQkyEE44St7zqlJS/+KgRTLJJH3P/icIUof4GOaw W/4b6vbw1+5dyWHrHqi9IcALe2G/HVPVwi+hp0ng= Date: Wed, 03 Jun 2020 16:03:22 -0700 From: Andrew Morton To: akpm@linux-foundation.org, ch0.han@lge.com, corbet@lwn.net, iamjoonsoo.kim@lge.com, linux-mm@kvack.org, mm-commits@vger.kernel.org, torvalds@linux-foundation.org, vbabka@suse.cz Subject: [patch 119/131] tools/vm/page_owner_sort.c: filter out unneeded line Message-ID: <20200603230322.JNHaLaumS%akpm@linux-foundation.org> In-Reply-To: <20200603155549.e041363450869eaae4c7f05b@linux-foundation.org> User-Agent: s-nail v14.8.16 X-Rspamd-Queue-Id: 3D15A1803F9AA X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam04 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: From: Changhee Han Subject: tools/vm/page_owner_sort.c: filter out unneeded line To see a sorted result from page_owner, there must be a tiresome preprocessing step before running page_owner_sort. This patch simply filters out lines which start with "PFN" while reading the page owner report. Link: http://lkml.kernel.org/r/20200429052940.16968-1-ch0.han@lge.com Signed-off-by: Changhee Han Reviewed-by: Andrew Morton Cc: Vlastimil Babka Cc: Joonsoo Kim Cc: Jonathan Corbet Signed-off-by: Andrew Morton --- Documentation/vm/page_owner.rst | 3 +-- tools/vm/page_owner_sort.c | 5 +++-- 2 files changed, 4 insertions(+), 4 deletions(-) --- a/Documentation/vm/page_owner.rst~tools-vm-page_owner_sort-filter-out-unneeded-line +++ a/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``. --- a/tools/vm/page_owner_sort.c~tools-vm-page_owner_sort-filter-out-unneeded-line +++ a/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, 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); } _