From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S968190AbdADPI4 (ORCPT ); Wed, 4 Jan 2017 10:08:56 -0500 Received: from smtprelay0034.hostedemail.com ([216.40.44.34]:59542 "EHLO smtprelay.hostedemail.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S965150AbdADPIJ (ORCPT ); Wed, 4 Jan 2017 10:08:09 -0500 X-Session-Marker: 726F737465647440676F6F646D69732E6F7267 X-Spam-Summary: 30,2,0,,d41d8cd98f00b204,rostedt@goodmis.org,:::::::::::::::::::::::::::::::::::::::,RULES_HIT:41:355:379:491:541:599:800:960:973:988:989:1260:1277:1311:1313:1314:1345:1359:1431:1437:1515:1516:1518:1534:1542:1593:1594:1711:1730:1747:1777:1792:2393:2553:2559:2562:3138:3139:3140:3141:3142:3167:3353:3622:3865:3866:3867:3868:3870:4043:4250:4605:5007:6261:6742:7514:7829:7875:7974:10004:10400:10848:10967:11026:11232:11658:11914:12043:12296:12438:12555:12740:12760:12895:12986:13255:13439:13846:14096:14097:14181:14659:14721:21060:21080:21451:30054:30055:30056:30064:30090:30091,0,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:9,LUA_SUMMARY:none X-HE-Tag: owner84_466ea1ca38b09 X-Filterd-Recvd-Size: 3901 Date: Wed, 4 Jan 2017 10:08:00 -0500 From: Steven Rostedt To: Thomas Gleixner , Ingo Molnar Cc: Daniel Bristot de Oliveira , linux-kernel@vger.kernel.org, "Peter Zijlstra (Intel)" , "H. Peter Anvin" , Tony Luck , Borislav Petkov , Dou Liyang , Nicolai Stange , Gu Zheng , Baoquan He , Denys Vlasenko , Claudio Fontana , Aaron Lu , Andrew Morton , Wanpeng Li , Hidehiro Kawai , linux-edac@vger.kernel.org, x86@kernel.org Subject: Re: [PATCH] x86, trace: Add __irq_entry annotation to x86's platform IRQ handlers Message-ID: <20170104100800.334a9a0e@gandalf.local.home> In-Reply-To: <059fdf437c2f0c09b13c18c8fe4e69999d3ffe69.1483528431.git.bristot@redhat.com> References: <059fdf437c2f0c09b13c18c8fe4e69999d3ffe69.1483528431.git.bristot@redhat.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 On Wed, 4 Jan 2017 12:20:33 +0100 Daniel Bristot de Oliveira wrote: > This patch adds the __irq_entry annotation to the defaults x86's > platform IRQ handlers. ftrace's function_graph tracer uses the > __irq_entry annotation to notify the entry and return of IRQ > handlers. > > For example, before the patch: > 354549.667252 | 3) d..1 | default_idle_call() { > 354549.667252 | 3) d..1 | arch_cpu_idle() { > 354549.667253 | 3) d..1 | default_idle() { > 354549.696886 | 3) d..1 | smp_trace_reschedule_interrupt() { > 354549.696886 | 3) d..1 | irq_enter() { > 354549.696886 | 3) d..1 | rcu_irq_enter() { > > After the patch: > 366416.254476 | 3) d..1 | arch_cpu_idle() { > 366416.254476 | 3) d..1 | default_idle() { > 366416.261566 | 3) d..1 ==========> | > 366416.261566 | 3) d..1 | smp_trace_reschedule_interrupt() { > 366416.261566 | 3) d..1 | irq_enter() { > 366416.261566 | 3) d..1 | rcu_irq_enter() { > > KASAN also uses this annotation. The smp_apic_timer_interrupt > was already annotated. Acked-by: Steven Rostedt (VMware) Thomas or Ingo, want to take this in tip? -- Steve > > Signed-off-by: Daniel Bristot de Oliveira > Cc: Thomas Gleixner > Cc: Ingo Molnar > Cc: "Peter Zijlstra (Intel)" > Cc: "H. Peter Anvin" > Cc: Steven Rostedt > Cc: Tony Luck > Cc: Borislav Petkov > Cc: Dou Liyang > Cc: Nicolai Stange > Cc: Gu Zheng > Cc: Baoquan He > Cc: Denys Vlasenko > Cc: Claudio Fontana > Cc: Aaron Lu > Cc: Andrew Morton > Cc: Wanpeng Li > Cc: Hidehiro Kawai > Cc: linux-kernel@vger.kernel.org > Cc: linux-edac@vger.kernel.org > Cc: x86@kernel.org