From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752192AbbC0QNT (ORCPT ); Fri, 27 Mar 2015 12:13:19 -0400 Received: from smtprelay0140.hostedemail.com ([216.40.44.140]:47158 "EHLO smtprelay.hostedemail.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750819AbbC0QNP (ORCPT ); Fri, 27 Mar 2015 12:13:15 -0400 X-Session-Marker: 726F737465647440676F6F646D69732E6F7267 X-Spam-Summary: 2,0,0,,d41d8cd98f00b204,rostedt@goodmis.org,:::::::::::::::::::,RULES_HIT:41:355:379:541:599:800:960:973:981:988:989:1260:1277:1311:1313:1314:1345:1359:1437:1515:1516:1518:1534:1540:1593:1594:1711:1730:1747:1777:1792:2198:2199:2393:2553:2559:2562:2693:2731:2736:3138:3139:3140:3141:3142:3352:3622:3653:3865:3866:3867:3868:3870:3871:3872:5007:6119:6120:6261:7514:7875:7901:7903:10004:10400:10848:10967:11232:11658:11914:12517:12519:12740:13069:13311:13357:13846:14096:14097:21080,0,RBL:none,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fn,MSBL:0,DNSBL:none,Custom_rules:0:0:0 X-HE-Tag: angle61_72a44224d7260 X-Filterd-Recvd-Size: 1971 Date: Fri, 27 Mar 2015 12:13:06 -0400 From: Steven Rostedt To: Namhyung Kim Cc: Arnaldo Carvalho de Melo , Ingo Molnar , Peter Zijlstra , Jiri Olsa , LKML , David Ahern , Minchan Kim , Joonsoo Kim , linux-mm@kvack.org Subject: Re: [PATCH 1/7] tracing, mm: Record pfn instead of pointer to struct page Message-ID: <20150327121306.32ad44c1@gandalf.local.home> In-Reply-To: <1427422087-17239-2-git-send-email-namhyung@kernel.org> References: <1427422087-17239-1-git-send-email-namhyung@kernel.org> <1427422087-17239-2-git-send-email-namhyung@kernel.org> X-Mailer: Claws Mail 3.11.1 (GTK+ 2.24.25; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 27 Mar 2015 11:08:01 +0900 Namhyung Kim wrote: > The struct page is opaque for userspace tools, so it'd be better to save > pfn in order to identify page frames. > > The textual output of $debugfs/tracing/trace file remains unchanged and > only raw (binary) data format is changed - but thanks to libtraceevent, > userspace tools which deal with the raw data (like perf and trace-cmd) > can parse the format easily. So impact on the userspace will also be > minimal. > > Based-on-patch-by: Joonsoo Kim > Acked-by: Ingo Molnar > Cc: Steven Rostedt > Cc: linux-mm@kvack.org > Signed-off-by: Namhyung Kim > --- Acked-by: Steven Rostedt -- Steve