Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932983AbcLIOA5 (ORCPT ); Fri, 9 Dec 2016 09:00:57 -0500 Received: from smtprelay0113.hostedemail.com ([216.40.44.113]:49703 "EHLO smtprelay.hostedemail.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753633AbcLIOA4 (ORCPT ); Fri, 9 Dec 2016 09:00:56 -0500 X-Session-Marker: 726F737465647440676F6F646D69732E6F7267 X-Spam-Summary: 2,0,0,,d41d8cd98f00b204,rostedt@goodmis.org,:::::,RULES_HIT:41:355:379:541:560:599:800:960:973:988:989:1260:1277:1311:1313:1314:1345:1359:1437:1515:1516:1518:1534:1537:1566:1593:1594:1711:1714:1730:1747:1777:1792:2393:2553:2559:2562:3138:3139:3140:3141:3142:3622:3865:3866:3867:3868:3870:3871:3873:3874:5007:6261:7875:10004:10400:10848:10967:11026:11232:11658:11914:12043:12740:12760:13069:13141:13230:13255:13311:13357:13439:14181:14659:14721:21080:21088:30034:30054:30070:30090:30091,0,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,LFtime:2,LUA_SUMMARY:none X-HE-Tag: book81_7e6821198e36 X-Filterd-Recvd-Size: 1285 Date: Fri, 9 Dec 2016 09:00:52 -0500 From: Steven Rostedt To: Marcin Nowakowski Cc: Ingo Molnar , Subject: Re: [PATCH 1/2] tracing/kprobes: add a helper method to return number of probe hits Message-ID: <20161209090052.106819b2@gandalf.local.home> In-Reply-To: <1481286352-31421-1-git-send-email-marcin.nowakowski@imgtec.com> References: <1481286352-31421-1-git-send-email-marcin.nowakowski@imgtec.com> X-Mailer: Claws Mail 3.14.0 (GTK+ 2.24.31; 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: 371 Lines: 11 On Fri, 9 Dec 2016 13:25:51 +0100 Marcin Nowakowski wrote: > The number of probe hits is stored in a percpu variable and therefore > can't be read directly. Add a helper method trace_kprobe_nhit() that > performs the required calculation. Can you please add the "why?" to this change log. Who needs this functionality, and why? -- Steve