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=-3.9 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,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 0D082C433E2 for ; Tue, 8 Sep 2020 20:02:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CD93D2137B for ; Tue, 8 Sep 2020 20:02:25 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="sXhlasBH"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="kxjaxt2d" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730993AbgIHUCX (ORCPT ); Tue, 8 Sep 2020 16:02:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50094 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730310AbgIHPfM (ORCPT ); Tue, 8 Sep 2020 11:35:12 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5B0E2C0619ED; Tue, 8 Sep 2020 08:14:33 -0700 (PDT) Date: Tue, 8 Sep 2020 17:12:29 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1599577950; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=lIVgIxTyroQddql8kti9o3VE5bSiFWAwUPsPZehXs9o=; b=sXhlasBHEKGmjbmZDMHbFD7Rsy2wjwblXmS7YU8lQi9EA9XqAewbLsZRFGt8nkjLTQXw8m zvObdrZX72xqJ9q18VgC85vQRLzqaFJWuwz2NhTol9lsNMd5XUs2iHQyUndQPPfwe1ObYU 4hS0AhQaQjpwUDgEH4gdT/S5SMvdRK7QZIVkFX+y2/qH6NR7/iikQiqvY4tovuObzBVRfP kU0j8vopuU9FkdMMkglSKe6aGOTRAbB+uqo3DB9QfD3RY04TkasmbP7xnB82T2Y2Fb/3lA gJ5riSIi14Cl5GEhKWbT681B2G48wMlt4t2OKPPt5uXsePgIv+Zsq+1OyjmJjA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1599577950; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=lIVgIxTyroQddql8kti9o3VE5bSiFWAwUPsPZehXs9o=; b=kxjaxt2dIjBlb5FiPBRsluID3bgNmV1B32kw3B0tymfXnJyo4JFDg6Dp5xE6ZrD035G1Al trsnmHCEmRg6jCAw== From: Sebastian Andrzej Siewior To: Mike Galbraith Cc: Thomas Gleixner , LKML , linux-rt-users , Steven Rostedt Subject: Re: v5.9-rc3-rt3 boot time networking lockdep splat Message-ID: <20200908151229.g24j4n4fderlm2pe@linutronix.de> References: <20200902155557.h2wl2qpfn2rwsofw@linutronix.de> <46a2b89ec8d953a4be18c7389c7d8c66310a7ff0.camel@gmx.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: Sender: linux-rt-users-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rt-users@vger.kernel.org On 2020-09-05 07:19:10 [+0200], Mike Galbraith wrote: > Lappy, which does not use bridge, boots clean... but lock leakage > pretty darn quickly inspires lockdep to craps its drawers. > > [ 209.001111] BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! > [ 209.001113] turning off the locking correctness validator. > [ 209.001114] CPU: 2 PID: 3773 Comm: Socket Thread Tainted: G S I E 5.9.0.gc70672d-rt3-rt #8 > [ 209.001117] Hardware name: HP HP Spectre x360 Convertible/804F, BIOS F.47 11/22/2017 > [ 209.001118] Call Trace: > [ 209.001123] dump_stack+0x77/0x9b > [ 209.001129] validate_chain+0xf60/0x1230 I have no idea how to debug this based on this report. Can you narrow it down to something? Is Lappy new, got a new something or has a new config switch? I'm just curious if this something or something that was always there but remained undetected. (Your other report was about something that was previously always "broken".) Sebastian