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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 73FB9C07E8E for ; Wed, 16 Aug 2023 18:26:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345517AbjHPS0D (ORCPT ); Wed, 16 Aug 2023 14:26:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55806 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345561AbjHPSZt (ORCPT ); Wed, 16 Aug 2023 14:25:49 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 04FF010C1 for ; Wed, 16 Aug 2023 11:25:45 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 8E92064BEC for ; Wed, 16 Aug 2023 18:25:44 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6FAEFC433C9; Wed, 16 Aug 2023 18:25:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1692210344; bh=DJ9yu5ye0vD8Z+3A9KM6d52IQi769IRpEDvJol43U0I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IwQ/zgn6Ju8dXSzStCVffNaP+brRNto+YD81cUxwnQfBe2Ybw9ZAZvB0/wNjccxYg j99A3B+mXVeJKvCvR6h7qtOIRjwmYpZzrUtZ6KDcZ0AKW2hfph321dafwGp7f36Ua+ Hko7EHq6CWN5ynR5c2MMGBdGLeCr2mlsebd/6oLHyWHouBubQpB1enee/1DavQT5ii Z+hozl+Av+acqE5maGMEZOk2G8np8h04iErZTkn3bo9nr5gim4+yfG2ldoNlEoqqIn hAWjl4E4m5Z+EFNfzy6uG6dfhAaQn+2YmLkJrWx1ckIAFKV0oRv3pZTT3a5UIF3bLp drffeZBX+I+mQ== From: Will Deacon To: Waiman Long , Mark Rutland Cc: catalin.marinas@arm.com, kernel-team@android.com, Will Deacon , Robin Murphy , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v6] perf/arm-dmc620: Fix dmc620_pmu_irqs_lock/cpu_hotplug_lock circular lock dependency Date: Wed, 16 Aug 2023 19:25:27 +0100 Message-Id: <169219176343.1943871.17852741864277810991.b4-ty@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20230812235549.494174-1-longman@redhat.com> References: <20230812235549.494174-1-longman@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 12 Aug 2023 19:55:49 -0400, Waiman Long wrote: > The following circular locking dependency was reported when running > cpus online/offline test on an arm64 system. > > [ 84.195923] Chain exists of: > dmc620_pmu_irqs_lock --> cpu_hotplug_lock --> cpuhp_state-down > > [ 84.207305] Possible unsafe locking scenario: > > [...] Applied to will (for-next/perf), thanks! [1/1] perf/arm-dmc620: Fix dmc620_pmu_irqs_lock/cpu_hotplug_lock circular lock dependency https://git.kernel.org/will/c/4c1d2f56d685 Cheers, -- Will https://fixes.arm64.dev https://next.arm64.dev https://will.arm64.dev