Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753826AbbEHQPV (ORCPT ); Fri, 8 May 2015 12:15:21 -0400 Received: from smtprelay0011.hostedemail.com ([216.40.44.11]:40027 "EHLO smtprelay.hostedemail.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753033AbbEHQPR (ORCPT ); Fri, 8 May 2015 12:15:17 -0400 X-Session-Marker: 726F737465647440676F6F646D69732E6F7267 X-Spam-Summary: 2,0,0,,d41d8cd98f00b204,rostedt@goodmis.org,:::::::::::::::::,RULES_HIT:41:355:379:541:599:800:960:973:988:989:1042:1260:1277:1311:1313:1314:1345:1359:1437:1515:1516:1518:1534:1539:1593:1594:1711:1714:1730:1747:1777:1792:2198:2199:2393:2553:2559:2562:2692:2693:3138:3139:3140:3141:3142:3351:3622:3865:3866:3867:3870:3871:3874:5007:6119:6261:7875:7903:10004:10400:10848:10967:11026:11232:11473:11658:11914:12296:12517:12519:12740:13069:13161:13229:13311:13357:21080,0,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: bite75_6817dde4fe700 X-Filterd-Recvd-Size: 2179 Date: Fri, 8 May 2015 12:15:14 -0400 From: Steven Rostedt To: John Stultz Cc: Drew Richardson , Peter Zijlstra , Mathieu Desnoyers , Ingo Molnar , "linux-kernel@vger.kernel.org" , Thomas Gleixner , Wade Cherry , Pawel Moll Subject: Re: [PATCHv3] ftrace: Provide trace clock monotonic raw Message-ID: <20150508121514.51863aed@gandalf.local.home> In-Reply-To: References: <1430750469-16428-1-git-send-email-drew.richardson@arm.com> <199091314.42407.1430752205090.JavaMail.zimbra@efficios.com> <20150504200515.GA24626@dreric01-Precision-T1650> <20150504205748.GB21418@twins.programming.kicks-ass.net> <20150505145438.GA5145@dreric01-Precision-T1650> <20150508100903.39641009@gandalf.local.home> <20150508143037.GB1276@dreric01-Precision-T1650> <20150508104120.3de866e0@gandalf.local.home> 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 Content-Length: 827 Lines: 24 On Fri, 8 May 2015 09:05:24 -0700 John Stultz wrote: > Yea. No objections from me wrt the functionality of the patch. Can I take that as an Acked-by? > > I'd just again maybe caution folks to not go too far in assuming > CLOCK_MONOTONIC_RAW doesn't have frequency changes, as the underlying > hardware will drift due to varying thermal conditions. I totally understand this, but that's a hardware limitation (outside the control of software). But CLOCK_MONOTONIC can drift due to software updates, which to me, is a significant difference. -- Steve -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/