From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id AAD57C43334 for ; Tue, 26 Jul 2022 10:46:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Subject:Cc:To: From:Date:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=ozENl76HOzMM1rOIm3V6E2MP797fFwOE9zQEOOREkgo=; b=AgAFmMvu23OMMq W5a3SPRWTsVktaFUUjlraamkPh7o6ewDgWklmJNk3GE3JQI9e6L2kWVL8ZmdiGMp81EL6HL0SP95M 8Y9uOvtMmoqWd2K7shyJZzk4Q+QIErO4E3zmIjQ6hyhkNn/Nek+SuMiiDO66GP/RwoqwnPSb0ORuP sdPFRTJYZvZ5cSq3hcy4qfdWwo2SiGuFFU8UsPKlyLnpQgb1hRlyEy9ogmi6VNvXTYKjz5m8LfaoJ RE0B+Kq8pQQUzxBUTDirrQLIV/enydmClSFgaDAfVroyDPW7Sj86+dOVgOzeVOVkcM+Cnv3YfJShA Mla6xGp+nmr0vWBYsbCw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oGI3V-00EESA-30; Tue, 26 Jul 2022 10:44:49 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oGI0U-00E8qk-DO for linux-arm-kernel@lists.infradead.org; Tue, 26 Jul 2022 10:41:44 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 6381D1FB; Tue, 26 Jul 2022 03:41:38 -0700 (PDT) Received: from bogus (e103737-lin.cambridge.arm.com [10.1.197.49]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 3F3C93F70D; Tue, 26 Jul 2022 03:41:37 -0700 (PDT) Date: Tue, 26 Jul 2022 11:41:34 +0100 From: Sudeep Holla To: linux-kernel@vger.kernel.org Cc: linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [-next] Lockdep warnings Message-ID: <20220726104134.3b3awfphvafljdgp@bogus> MIME-Version: 1.0 Content-Disposition: inline X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220726_034142_532125_A521D472 X-CRM114-Status: UNSURE ( 7.08 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org I was seeing the below lockdep warnings on my arm64 Juno development platform almost 2 weeks back with -next. I wanted to check for similar reports before post and forgot. --->8 DEBUG_LOCKS_WARN_ON(lockdep_hardirqs_enabled()) hardirqs last enabled at (46157): cpuidle_enter_state+0x174/0x2b4 WARNING: CPU: 5 PID: 0 at kernel/locking/lockdep.c:5506 check_flags+0x90/0x1e8 hardirqs last disabled at (46158): el1_interrupt+0x2c/0xc8 Modules linked in: softirqs last enabled at (46154): __do_softirq+0x2c0/0x388 softirqs last disabled at (46139): __irq_exit_rcu+0x118/0x18c CPU: 5 PID: 0 Comm: swapper/5 Not tainted 5.19.0-rc6-next-20220714 #9 pstate: 600000c5 (nZCv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : check_flags+0x90/0x1e8 lr : check_flags+0x90/0x1e8 Call trace: check_flags+0x90/0x1e8 lock_is_held_type+0x80/0x164 rcu_read_lock_sched_held+0x40/0x7c trace_rcu_dyntick+0x5c/0x140 ct_kernel_enter+0x78/0xd4 ct_idle_exit+0x1c/0x44 cpu_idle_poll+0x74/0xb8 do_idle+0x90/0x2c4 cpu_startup_entry+0x30/0x34 secondary_start_kernel+0x130/0x144 __secondary_switched+0xb0/0xb4 irq event stamp: 64229 hardirqs last enabled at (64229): cpu_idle_poll+0x40/0xb8 hardirqs last disabled at (64228): do_idle+0xbc/0x2c4 softirqs last enabled at (64190): __do_softirq+0x2c0/0x388 softirqs last disabled at (64185): __irq_exit_rcu+0x118/0x18c ---[ end trace 0000000000000000 ]--- possible reason: unannotated irqs-off. irq event stamp: 64229 hardirqs last enabled at (64229): cpu_idle_poll+0x40/0xb8 hardirqs last disabled at (64228): do_idle+0xbc/0x2c4 softirqs last enabled at (64190): __do_softirq+0x2c0/0x388 softirqs last disabled at (64185): __irq_exit_rcu+0x118/0x18c ---- However I don't see the above warning with the latest -next. When I tried yesterday's -next now, I see a different warning. Not sure if they are related. I haven't tried to bisect. --->8 ============================= [ BUG: Invalid wait context ] 5.19.0-rc8-next-20220725 #38 Not tainted ----------------------------- swapper/0/0 is trying to lock: (&drvdata->spinlock){....}-{3:3}, at: cti_cpu_pm_notify+0x54/0x114 other info that might help us debug this: context-{5:5} 1 lock held by swapper/0/0: #0: (cpu_pm_notifier.lock){....}-{2:2}, at: cpu_pm_enter+0x2c/0x80 stack backtrace: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.19.0-rc8-next-20220725-00004-g599e6691ed8c #38 Call trace: dump_backtrace+0xe8/0x108 show_stack+0x18/0x4c dump_stack_lvl+0x90/0xc8 dump_stack+0x18/0x54 __lock_acquire+0xa70/0x32d0 lock_acquire+0x160/0x308 _raw_spin_lock+0x60/0xa0 cti_cpu_pm_notify+0x54/0x114 raw_notifier_call_chain_robust+0x50/0xd4 cpu_pm_enter+0x48/0x80 psci_enter_idle_state+0x34/0x74 cpuidle_enter_state+0x120/0x2a8 cpuidle_enter+0x38/0x50 do_idle+0x1e8/0x2b8 cpu_startup_entry+0x24/0x28 kernel_init+0x0/0x1a0 start_kernel+0x0/0x470 start_kernel+0x34c/0x470 __primary_switched+0xbc/0xc4 ---- -- Regards, Sudeep _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel