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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham 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 BBF95C48BD6 for ; Thu, 27 Jun 2019 00:27:11 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7516C2083B for ; Thu, 27 Jun 2019 00:27:11 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7516C2083B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=telegraphics.com.au Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 45Z11T1J3fzDqX1 for ; Thu, 27 Jun 2019 10:27:09 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=none (mailfrom) smtp.mailfrom=telegraphics.com.au (client-ip=98.124.60.144; helo=kvm5.telegraphics.com.au; envelope-from=fthain@telegraphics.com.au; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=telegraphics.com.au Received: from kvm5.telegraphics.com.au (kvm5.telegraphics.com.au [98.124.60.144]) by lists.ozlabs.org (Postfix) with ESMTP id 45Z0zc0xzGzDqKK for ; Thu, 27 Jun 2019 10:25:31 +1000 (AEST) Received: from localhost (localhost.localdomain [127.0.0.1]) by kvm5.telegraphics.com.au (Postfix) with ESMTP id 453FC29B40; Wed, 26 Jun 2019 20:25:21 -0400 (EDT) Date: Thu, 27 Jun 2019 10:25:19 +1000 (AEST) From: Finn Thain To: Christophe Leroy Subject: Re: Bisected regression in v5.1 on PowerBook G3 (Wallstreet) In-Reply-To: <03df9f3c-003a-b4ae-6f76-ba8a20742b25@c-s.fr> Message-ID: References: <03df9f3c-003a-b4ae-6f76-ba8a20742b25@c-s.fr> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linuxppc-dev@lists.ozlabs.org, Stan Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Wed, 26 Jun 2019, Christophe Leroy wrote: > Hi Finn, > > On 06/26/2019 02:06 AM, Finn Thain wrote: > > Hi Christophe, > > > > I received a report of a regression between v5.0 and v5.1 which causes > > the current release to crash during boot with a machine check > > exception. Please see console log below. > > > > Stan (whom I've Cc'd) tells me that this happens on every attempt to > > boot. I asked him to try 'git bisect'. The results are given below. > > Can you see anything in commit 93c4a162b014 that might explain this? > > Might be a false positive. That commit has a problem, but that problem > is fixed by 4622a2d43101 ("powerpc/6xx: fix setup and use of > SPRN_SPRG_PGDIR for hash32") > > I would bet your problem is related to commit f7354ccac844 ("powerpc/32: > Remove CURRENT_THREAD_INFO and rename TI_CPU"). That problem is fixed by > commit 397d2300b08c ("powerpc/32s: fix flush_hash_pages() on SMP") > upstream, and in linux 5.1.4 by commit fda49aec2515 on > stable/linux-5.1.y > I see. I've just discovered that this issue has already been covered on this list. I should have done a bit more research. > Can you test ? > Stan did some more tests and confirmed that the problem has been fixed in 397d2300b08c and stable/linux-5.1.y. Thanks. -- > Thanks > Christophe >