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 X-Spam-Level: X-Spam-Status: No, score=-1.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4D178C54FCB for ; Mon, 27 Apr 2020 15:49:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2511020661 for ; Mon, 27 Apr 2020 15:49:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588002563; bh=OyNRz7IsAlS0ADmWwL2MYfrE+apa1uCaMYPWIt9UIwY=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=hoUi3aJb5ntrKzIipPdOQOkuUSVNPiouEW/WrBE0tODNOD42cFzRemwRVOXEOCTlj bGo/OWiCzXziKtACL+9vPxNG/sqJJq8Zsdwbdy2G5wUNaTmB1jwP6998DrEJ3FLsfp y8wbivI5c8lLLNqy5HP2jnvlkdpt7hguUQ9zp330= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728440AbgD0PtW (ORCPT ); Mon, 27 Apr 2020 11:49:22 -0400 Received: from mail.kernel.org ([198.145.29.99]:58190 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727006AbgD0PtV (ORCPT ); Mon, 27 Apr 2020 11:49:21 -0400 Received: from localhost (unknown [213.57.247.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D14AA2064C; Mon, 27 Apr 2020 15:49:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588002561; bh=OyNRz7IsAlS0ADmWwL2MYfrE+apa1uCaMYPWIt9UIwY=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=zuPT42M9YmX7VY+ZqbSHQJlDBEhAbUdK/fU9+MY5pk67ORz/B6t/sh8QSXFh9EW7I VhPsjXizWfkuGmL4VqxU8NDRMneAvln8B5V7AQ+iVqoCrvkCAMyr4s3U6CyyRzc9Mf z64rzqlXvUVNJBcs3qLmLUwZWaXtC57e/anzudpQ= Date: Mon, 27 Apr 2020 18:49:17 +0300 From: Leon Romanovsky To: Thomas Gleixner Cc: Ingo Molnar , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , x86 , Suresh Siddha , linux-kernel@vger.kernel.org Subject: Re: [PATCH] x86/apic: Fix circular locking dependency between console and hrtimer locks Message-ID: <20200427154917.GF134660@unreal> References: <20200407170925.1775019-1-leon@kernel.org> <20200414054836.GA956407@unreal> <20200414062454.GA84326@gmail.com> <20200414070502.GR334007@unreal> <87v9llosax.fsf@nanos.tec.linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <87v9llosax.fsf@nanos.tec.linutronix.de> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Apr 27, 2020 at 05:35:18PM +0200, Thomas Gleixner wrote: > Leon Romanovsky writes: > > But if we are talking about other weirdnesses, I have another splat in my > > QEMU machine, which is different, but from the same code area. > > It's a completely different code area, really. This triggers in > deactivate_slab(). > > > [ 1.383968] ACPI: Added _OSI(Module Device) > > [ 1.385684] ACPI: Added _OSI(Processor Device) > > [ 1.389345] ACPI: Added _OSI(3.0 _SCP Extensions) > > [ 1.389345] ACPI: Added _OSI(Processor Aggregator Device) > > [ 1.393454] ACPI: Added _OSI(Linux-Dell-Video) > > [ 1.394920] ACPI: Added _OSI(Linux-Lenovo-NV-HDMI-Audio) > > [ 1.396481] ACPI: Added _OSI(Linux-HPI-Hybrid-Graphics) > > [ 1.793418] ACPI: 1 ACPI AML tables successfully acquired and loaded > > [ 1.845452] > > [ 1.846768] ============================= > > [ 1.849293] [ BUG: Invalid wait context ] > > Do you have CONFIG_PROVE_RAW_LOCK_NESTING enabled? If yes, please > disable it. The Kconfig option explains that this will trigger > splats. Yes, I have it enabled. Thanks for the tip. > > If not, then this is mysterious but has absolutely nothing to do with > the other thing. It's also completely unrelated to ACPI ... > > Thanks, > > tglx