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=-2.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 8F824C33CA9 for ; Mon, 13 Jan 2020 15:59:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 599BA20678 for ; Mon, 13 Jan 2020 15:59:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="iDXLgDDv" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728778AbgAMP7j (ORCPT ); Mon, 13 Jan 2020 10:59:39 -0500 Received: from merlin.infradead.org ([205.233.59.134]:35298 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728641AbgAMP7j (ORCPT ); Mon, 13 Jan 2020 10:59:39 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=/pevCa93KHqfbMoDCpY5wsv4jaMKrRibMGIqXRPVA6E=; b=iDXLgDDvIoj9wg5DltxvLrdR4 Eupi3SdBufVUgd1ffaogni2b203DcAZ0wTsFDfrijEf4+59yeq/1yVe9ZKiRNI+WXHeJVbInj4F2I lEXcox2nGBWH0gB1PPxmZEVlNDKqmgRk0zNaGRAeD0Fb3N48ZgqfNOye0aRF5AzKzt30b3+s5YTn4 yGuQ5fbNq9O+WovLYNEWlCOenZcg2baXz+tqI8If/ic07fGuvaoZf1VbSGvBzcdv+hjacruyw4nhh 0lggbRIeQ/f/b1L0UcbGx/VJJ2W6htYHi34yZS3LlMV9oCJUMKKG6ybaa5gb5Fb9dJp2h7gNpVID1 hJD/Q/2sQ==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by merlin.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1ir27r-0000E9-So; Mon, 13 Jan 2020 15:59:36 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 2E5403042BC; Mon, 13 Jan 2020 16:57:59 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 9938920427392; Mon, 13 Jan 2020 16:59:34 +0100 (CET) Date: Mon, 13 Jan 2020 16:59:34 +0100 From: Peter Zijlstra To: Waiman Long Cc: Ingo Molnar , Will Deacon , linux-kernel@vger.kernel.org, Bart Van Assche Subject: Re: [PATCH v2 4/6] locking/lockdep: Reuse freed chain_hlocks entries Message-ID: <20200113155934.GZ2844@hirez.programming.kicks-ass.net> References: <20191216151517.7060-1-longman@redhat.com> <20191216151517.7060-5-longman@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191216151517.7060-5-longman@redhat.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Dec 16, 2019 at 10:15:15AM -0500, Waiman Long wrote: > An internal nfsd test that ran for more than an hour could cause the > following message to be displayed. > > [ 4318.443670] BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! I'm guessing the pertinent detail you forget to mention here is that that test re-loads the nfs modules lots of times?