From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pd0-f177.google.com (mail-pd0-f177.google.com [209.85.192.177]) by kanga.kvack.org (Postfix) with ESMTP id 99B42900021 for ; Tue, 28 Oct 2014 01:32:20 -0400 (EDT) Received: by mail-pd0-f177.google.com with SMTP id v10so6978162pde.8 for ; Mon, 27 Oct 2014 22:32:20 -0700 (PDT) Received: from lgeamrelo02.lge.com (lgeamrelo02.lge.com. [156.147.1.126]) by mx.google.com with ESMTP id yl3si355481pbb.152.2014.10.27.22.32.17 for ; Mon, 27 Oct 2014 22:32:19 -0700 (PDT) From: Namhyung Kim Subject: Re: [RFC][PATCH 0/6] Another go at speculative page faults References: <20141020215633.717315139@infradead.org> <20141021162340.GA5508@gmail.com> <20141021170948.GA25964@node.dhcp.inet.fi> <20141021175603.GI3219@twins.programming.kicks-ass.net> <5448DB05.5050803@cn.fujitsu.com> <20141023110438.GQ21513@worktop.programming.kicks-ass.net> <20141024075423.GA24479@gmail.com> <20141024131440.GZ21513@worktop.programming.kicks-ass.net> Date: Tue, 28 Oct 2014 14:32:16 +0900 In-Reply-To: <20141024131440.GZ21513@worktop.programming.kicks-ass.net> (Peter Zijlstra's message of "Fri, 24 Oct 2014 15:14:40 +0200") Message-ID: <87mw8g7o9r.fsf@sejong.aot.lge.com> MIME-Version: 1.0 Content-Type: text/plain Sender: owner-linux-mm@kvack.org List-ID: To: Peter Zijlstra Cc: Ingo Molnar , Lai Jiangshan , "Kirill A. Shutemov" , torvalds@linux-foundation.org, paulmck@linux.vnet.ibm.com, tglx@linutronix.de, akpm@linux-foundation.org, riel@redhat.com, mgorman@suse.de, oleg@redhat.com, mingo@redhat.com, minchan@kernel.org, kamezawa.hiroyu@jp.fujitsu.com, viro@zeniv.linux.org.uk, dave@stgolabs.net, linux-kernel@vger.kernel.org, linux-mm@kvack.org Hi Peter, On Fri, 24 Oct 2014 15:14:40 +0200, Peter Zijlstra wrote: > On Fri, Oct 24, 2014 at 09:54:23AM +0200, Ingo Molnar wrote: >> >> * Peter Zijlstra wrote: >> > Its what I thought initially, I tried doing perf record with and >> > without, but then I ran into perf diff not quite working for me and I've >> > yet to find time to kick that thing into shape. >> >> Might be the 'perf diff' regression fixed by this: >> >> 9ab1f50876db perf diff: Add missing hists__init() call at tool start >> >> I just pushed it out into tip:master. > > I was on tip/master, so unlikely to be that as I was likely already > having it. > > perf-report was affected too, for some reason my CONFIG_DEBUG_INFO=y > vmlinux wasn't showing symbols (and I double checked that KASLR crap was > disabled, so that wasn't confusing stuff either). > > When I forced perf-report to use kallsyms it works, however perf-diff > doesn't have that option. > > So there's two issues there, 1) perf-report failing to generate useful > output and 2) per-diff lacking options to force it to behave. Did the perf-report fail to show any (kernel) symbols or are they wrong symbols? Maybe it's related to this: https://lkml.org/lkml/2014/9/22/78 Thanks, Namhyung -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org