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 9D060C77B73 for ; Thu, 20 Apr 2023 08:23:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234070AbjDTIX6 (ORCPT ); Thu, 20 Apr 2023 04:23:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54514 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229625AbjDTIX4 (ORCPT ); Thu, 20 Apr 2023 04:23:56 -0400 Received: from mail-pf1-x42b.google.com (mail-pf1-x42b.google.com [IPv6:2607:f8b0:4864:20::42b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CCBF04C31 for ; Thu, 20 Apr 2023 01:23:33 -0700 (PDT) Received: by mail-pf1-x42b.google.com with SMTP id d2e1a72fcca58-63b73203e0aso5200828b3a.1 for ; Thu, 20 Apr 2023 01:23:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1681979012; x=1684571012; h=content-transfer-encoding:in-reply-to:mime-version:user-agent:date :message-id:from:cc:references:to:subject:from:to:cc:subject:date :message-id:reply-to; bh=keIzP2s8exbHQqMK0zNkSUGUtutyvTfwC9cMr44POg8=; b=ctKNJEWjuu3lApTP63KdFeQfCndH2onovMc1AhhX71zoZWv4hXbSvO1PSMnGtohm07 8TpQkvy+VvqekNb9Oe5FrvbUEm34/yGzcQ8PqZRngzaXd1F6DbweW604cd0djCHowX8p /fJTSv4mdcPyH7Yvg6bZNdgHESewaP2fytMae08GiIGH6zNmVvUWeJpYc7RKK6dLc9Jt WR51wwTiuHVeSxmotOWoV1+UYi13Asu1CnECT5h9nI8YNUCLDnbH6Q3Za4ez0q6fIjBl DqzZHUzL2woHuj0oq0HDxI9efyr99WbPMIq+GjBczy4CBt8OTh453SmjP/JH8bWx0E4d nV/g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1681979012; x=1684571012; h=content-transfer-encoding:in-reply-to:mime-version:user-agent:date :message-id:from:cc:references:to:subject:x-gm-message-state:from:to :cc:subject:date:message-id:reply-to; bh=keIzP2s8exbHQqMK0zNkSUGUtutyvTfwC9cMr44POg8=; b=aHclsxgiOYi+v58fDVN5maGpcLLDKtEVIkFUG441RJaH5keCXdSwILt0N+bvUOcHjm z8Dk+ul249SPyU/ckJrTkcey+sF2EVgG05tzVlabVbHMUjHMA2+87JEFHzY/HxhqMSvr jil2MEGb3rvpjZeh5xmNB0pX21oQBqo1T3rGn/Dw8Eq5919EevQ2GyOwTK+PgAHPddZK t2m9eHlmQpUR3LVV8GoRlacvWs0iRIckjMfKQ9swoC0GjorTfHkbsLIsEkON2Htklagg 2MHVlVXmXtJ5tFP2UJKGg6MYG4lmZtQRkMu5TvBSqZ5bsW8dkl4oWdrqEvytU2MGwafd DK7g== X-Gm-Message-State: AAQBX9dpygDvoCsI3gBU3/rGAQAo3NX75BHUwHNrKk0fUTI1HG+0aEpv tS9sQMGkBijmGjtSbUp9vrKK8sYDQqI= X-Google-Smtp-Source: AKy350a7q+BRpAIbw9R7fvRfBhmVbXRUoiUCDqVupUsVWZCAlSHjaY+GTQQWUG2e0cCWf/IwC9S4SA== X-Received: by 2002:a17:902:ea07:b0:19b:64bb:d546 with SMTP id s7-20020a170902ea0700b0019b64bbd546mr679444plg.18.1681979012564; Thu, 20 Apr 2023 01:23:32 -0700 (PDT) Received: from [10.1.1.24] (222-152-172-8-fibre.sparkbb.co.nz. [222.152.172.8]) by smtp.gmail.com with ESMTPSA id h11-20020a170902748b00b001a810871797sm692542pll.38.2023.04.20.01.23.29 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Thu, 20 Apr 2023 01:23:32 -0700 (PDT) Subject: Re: reliable reproducer, was Re: core dump analysis To: Finn Thain References: <4a9c1d0d-07aa-792e-921f-237d5a30fc44.ref@yahoo.com> <87zg7rap45.fsf@igel.home> <5a5588ca-81c3-3f4c-fd43-c95e90b27939@linux-m68k.org> <67f6bc5f-e1fc-64b9-cb3c-1698cf4daf51@gmail.com> <9eea635f-c947-eae7-09fa-d39f00d91532@linux-m68k.org> <3dfea52a-b09e-517a-c3ca-4b559a3d9ce4@gmail.com> <23ddfd2a-1123-45ae-866d-158d45e23ba2@linux-m68k.org> <2f241963-44cd-3196-b39e-9c2d63cda1d3@linux-m68k.org> <60109ace-4e55-29da-86d9-35e931b11134@gmail.com> <54597ab3-2776-2a55-9952-3bfbbc329829@linux-m68k.org> <406cb339-0a0c-4d71-9b5c-c11568793c14@gmail.com> Cc: debian-68k@lists.debian.org, linux-m68k@lists.linux-m68k.org From: Michael Schmitz Message-ID: <71af7b52-a1d4-581c-d5af-afce6991c48d@gmail.com> Date: Thu, 20 Apr 2023 20:23:27 +1200 User-Agent: Mozilla/5.0 (X11; Linux ppc; rv:45.0) Gecko/20100101 Icedove/45.4.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-m68k@vger.kernel.org Hi Finn, Am 20.04.2023 um 19:47 schrieb Finn Thain: >>> So all the stack pages would have been faulted in well before the >>> failure shows up. It appears to be the signal that's the problem and >>> not the page fault. That's not surprising considering the PC in the >>> signal frame in the dash crash was a MOVEM saving registers onto the >>> stack. >> >> Well. without locking the faulted in pages in memory we can't be sure >> they were not swapped back out. Unless I misunderstand what's involved >> in that ... >> > > There was no swap enabled. > > 50000 frames * 36 bytes per frame == 1.8 MB OK - swap is enabled in my case. That may explain the different fault rates. But in any case, it looks like we can eliminate the bus error code. Same fault on both 030 and 040 with very different bus error handlers is highly unlikely. Cheers. Michael