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=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 98101C34047 for ; Wed, 19 Feb 2020 15:21:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6B27C24656 for ; Wed, 19 Feb 2020 15:21:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726683AbgBSPVO (ORCPT ); Wed, 19 Feb 2020 10:21:14 -0500 Received: from outgoing-auth-1.mit.edu ([18.9.28.11]:55067 "EHLO outgoing.mit.edu" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726634AbgBSPVO (ORCPT ); Wed, 19 Feb 2020 10:21:14 -0500 Received: from callcc.thunk.org (guestnat-104-133-8-109.corp.google.com [104.133.8.109] (may be forged)) (authenticated bits=0) (User authenticated as tytso@ATHENA.MIT.EDU) by outgoing.mit.edu (8.14.7/8.12.4) with ESMTP id 01JFKKQq000942 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 19 Feb 2020 10:20:22 -0500 Received: by callcc.thunk.org (Postfix, from userid 15806) id 730374211EF; Wed, 19 Feb 2020 10:20:20 -0500 (EST) Date: Wed, 19 Feb 2020 10:20:20 -0500 From: "Theodore Y. Ts'o" To: Jan Kara Cc: Yang Xu , fstests Subject: Re: generic/269 hangs on lastest upstream kernel Message-ID: <20200219152020.GH330201@mit.edu> References: <20200213211011.GB6600@quack2.suse.cz> <062ac52c-3a16-22ef-6396-53334ed94783@cn.fujitsu.com> <20200214150059.GA22815@quack2.suse.cz> <20200218082436.GF16121@quack2.suse.cz> <83cc6208-3fa3-86bb-eb91-77b90b22d98f@cn.fujitsu.com> <20200218110311.GI16121@quack2.suse.cz> <73af3d5c-ca64-3ad3-aee2-1e78ee4fae4a@cn.fujitsu.com> <20200219124324.GO16121@quack2.suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200219124324.GO16121@quack2.suse.cz> Sender: fstests-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: fstests@vger.kernel.org On Wed, Feb 19, 2020 at 01:43:24PM +0100, Jan Kara wrote: > This means, fsstress command has queued cache flush request (from > blkdev_issue_flush()), this has been dispatched to the driver ('D' event) > but it has never been completed by the driver and so blkdev_issue_flush() > never returns. > > To debug this further, you probably need to start looking into what happens > with the request inside QEMU. There's not much I can help you with at this > point since I'm not an expert there. Do you use image file as a backing store > or a raw partition? This is looking more and more like a Qemu bug or a host OS issue. Yang is using a two year old Qemu (qemu-kvm-2.12.0-32.el8+1900+70997154) and is using a QCOW backing file. It also could be a host kernel bug, although that's less likely. Yang, any chance you could have a chance to upgrade to a newer version of Qemu, and see if the problem goes away? If you have a RHEL support contract, perhaps you could file a support request with the Red Hat help desk? - Ted