From patchwork Tue Apr 26 19:17:25 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steven Rostedt X-Patchwork-Id: 8943291 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 9E6739F441 for ; Tue, 26 Apr 2016 19:19:25 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 982EB2011E for ; Tue, 26 Apr 2016 19:19:24 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A8EFC200DB for ; Tue, 26 Apr 2016 19:19:23 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1av8Ud-0007Ty-Gy; Tue, 26 Apr 2016 19:17:55 +0000 Received: from smtprelay0251.hostedemail.com ([216.40.44.251] helo=smtprelay.hostedemail.com) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1av8UZ-0007RY-Uv for linux-arm-kernel@lists.infradead.org; Tue, 26 Apr 2016 19:17:52 +0000 Received: from filter.hostedemail.com (unknown [216.40.38.60]) by smtprelay05.hostedemail.com (Postfix) with ESMTP id B801B269195; Tue, 26 Apr 2016 19:17:27 +0000 (UTC) X-Session-Marker: 726F737465647440676F6F646D69732E6F7267 X-Spam-Summary: 2, 0, 0, , d41d8cd98f00b204, rostedt@goodmis.org, :::::::::::::, RULES_HIT:41:69:355:379:541:599:800:960:973:988:989:1260:1277:1311:1313:1314:1345:1359:1437:1515:1516:1518:1534:1542:1593:1594:1711:1730:1747:1777:1792:1981:2194:2199:2393:2553:2559:2562:3138:3139:3140:3141:3142:3353:3622:3865:3866:3867:3871:3872:3874:4321:4361:5007:6261:7208:7903:8957:9010:9040:9113:9163:10004:10400:10848:10967:11026:11232:11473:11658:11914:12043:12295:12438:12517:12519:12555:12740:13439:14096:14097:14181:14659:14721:21080, 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, LFtime:2, LUA_SUMMARY:none X-HE-Tag: duck58_23e452db3785a X-Filterd-Recvd-Size: 3651 Received: from gandalf.local.home (cpe-67-246-153-56.stny.res.rr.com [67.246.153.56]) (Authenticated sender: rostedt@goodmis.org) by omf01.hostedemail.com (Postfix) with ESMTPA; Tue, 26 Apr 2016 19:17:26 +0000 (UTC) Date: Tue, 26 Apr 2016 15:17:25 -0400 From: Steven Rostedt To: Tony Lindgren Subject: Re: [PATCH arm 1/1] arm: Use _rcuidle tracepoint to allow use from idle Message-ID: <20160426151725.657ae70c@gandalf.local.home> In-Reply-To: <20160426182939.GO5995@atomide.com> References: <1461617335-22372-1-git-send-email-paulmck@linux.vnet.ibm.com> <20160426150031.GP5995@atomide.com> <20160426175214.GJ3715@linux.vnet.ibm.com> <20160426182939.GO5995@atomide.com> X-Mailer: Claws Mail 3.13.2 (GTK+ 2.24.30; x86_64-pc-linux-gnu) MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160426_121752_162892_824B71C9 X-CRM114-Status: GOOD ( 15.71 ) X-Spam-Score: -1.9 (-) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "Paul E. McKenney" , Russell King , linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, mingo@kernel.org, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-5.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP On Tue, 26 Apr 2016 11:29:39 -0700 Tony Lindgren wrote: > * Paul E. McKenney [160426 10:53]: > > Does the following patch help? > > It just changes the output.. See below. > > > It is quite possible that there are quite a few more of these. If this > > is the case, then one way to make the kernel list more of them on a > > given boot is to build with CONFIG_PROVE_RCU_REPEATEDLY=y. > > OK > > Regards, > > Tony > > 8< ------------------ > CPU: Testing write buffer coherency: ok > CPU0: thread -1, cpu 0, socket 0, mpidr 80000000 > > > RCU used illegally from idle CPU! > rcu_scheduler_active = 1, debug_locks = 0 > RCU used illegally from extended quiescent state! > no locks held by swapper/1/0. > > stack backtrace: > CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.6.0-rc5-next-20160426+ #1113 > Hardware name: Generic OMAP4 (Flattened Device Tree) > [] (unwind_backtrace) from [] (show_stack+0x10/0x14) > [] (show_stack) from [] (dump_stack+0xb0/0xe4) > [] (dump_stack) from [] (pwrdm_set_next_pwrst+0x100/0x1d4) > [] (pwrdm_set_next_pwrst) from [] (omap4_enter_lowpower+0xc8/0x230) > [] (omap4_enter_lowpower) from [] (omap_enter_idle_coupled+0x6c/0x254) > [] (omap_enter_idle_coupled) from [] (cpuidle_enter_state+0x80/0x3d4) > [] (cpuidle_enter_state) from [] (cpuidle_enter_state_coupled+0x348/0x390) > [] (cpuidle_enter_state_coupled) from [] (cpu_startup_entry+0x198/0x3a0) > [] (cpu_startup_entry) from [<8010162c>] (0x8010162c) > hw-breakpoint: Failed to enable monitor mode on CPU 0. Time to play "Whack-a-Mole"(TM) Signed-off-by: Steven Rostedt diff --git a/arch/arm/mach-omap2/powerdomain.c b/arch/arm/mach-omap2/powerdomain.c index 78af6d8cf2e2..12b66b5bcc55 100644 --- a/arch/arm/mach-omap2/powerdomain.c +++ b/arch/arm/mach-omap2/powerdomain.c @@ -523,8 +523,8 @@ int pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst) if (arch_pwrdm && arch_pwrdm->pwrdm_set_next_pwrst) { /* Trace the pwrdm desired target state */ - trace_power_domain_target(pwrdm->name, pwrst, - smp_processor_id()); + trace_power_domain_target_rcuidle(pwrdm->name, pwrst, + smp_processor_id()); /* Program the pwrdm desired target state */ ret = arch_pwrdm->pwrdm_set_next_pwrst(pwrdm, pwrst); }