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=-2.2 required=3.0 tests=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 9FCFBC43603 for ; Sun, 8 Dec 2019 20:41:20 +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 0936E2053B for ; Sun, 8 Dec 2019 20:41:19 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0936E2053B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=sandeen.net 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 47WJBj2jSVzDqNZ for ; Mon, 9 Dec 2019 07:41:17 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=sandeen.net (client-ip=63.231.237.45; helo=sandeen.net; envelope-from=sandeen@sandeen.net; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=sandeen.net X-Greylist: delayed 537 seconds by postgrey-1.36 at bilbo; Mon, 09 Dec 2019 07:39:34 AEDT Received: from sandeen.net (sandeen.net [63.231.237.45]) by lists.ozlabs.org (Postfix) with ESMTP id 47WJ8k1N4GzDqMT for ; Mon, 9 Dec 2019 07:39:34 +1100 (AEDT) Received: from [10.0.0.4] (erlite [10.0.0.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by sandeen.net (Postfix) with ESMTPSA id 15E034A0; Sun, 8 Dec 2019 14:30:34 -0600 (CST) Subject: Re: [bug] userspace hitting sporadic SIGBUS on xfs (Power9, ppc64le), v4.19 and later To: dftxbs3e , Jan Stancek , linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, hch@infradead.org, darrick.wong@oracle.com, linuxppc-dev@lists.ozlabs.org, Memory Management , LTP Mailing List , CKI Project , Michael Ellerman References: <9c0af967-4916-4e8b-e77f-087515793d77@free.fr> From: Eric Sandeen Autocrypt: addr=sandeen@sandeen.net; 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Intel Mac OS X 10.15; rv:68.0) Gecko/20100101 Thunderbird/68.3.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit 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: , Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On 12/6/19 6:09 PM, dftxbs3e wrote: > Hello! > > I am very happy that someone has found this issue. > > I have been suffering from rather random SIGBUS errors in similar > conditions described by the author. > > I don't have much troubleshooting information to provide, however, I hit > the issue regularly so I could investigate during that. > > How do you debug such an issue? I tried a debugger etc. but besides > crashing with SIGBUS, I couldnt get any other meaningful information. You may want to test the patch Christoph sent on the original thread for this issue. -Eric