From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755998AbbEUUbW (ORCPT ); Thu, 21 May 2015 16:31:22 -0400 Received: from cantor2.suse.de ([195.135.220.15]:53265 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753915AbbEUUbV (ORCPT ); Thu, 21 May 2015 16:31:21 -0400 Date: Fri, 22 May 2015 06:31:12 +1000 From: NeilBrown To: Dave Jones Cc: Linux Kernel Subject: Re: incomplete RAID0 array causing bdi_unregister WARN_ON. Message-ID: <20150522063112.6decfca6@notabene.brown> In-Reply-To: <20150521154749.GA20102@codemonkey.org.uk> References: <20150521154749.GA20102@codemonkey.org.uk> X-Mailer: Claws Mail 3.10.1-162-g4d0ed6 (GTK+ 2.24.25; x86_64-suse-linux-gnu) MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; boundary="Sig_/ooi1A9e8mGtScLcBPAllhYH"; protocol="application/pgp-signature" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --Sig_/ooi1A9e8mGtScLcBPAllhYH Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Thu, 21 May 2015 11:47:49 -0400 Dave Jones wro= te: > One of the disks in my 4 disk RAID0 stripe died. > It's a hardware problem, but this spew seems unnecessary.. >=20 > Dave >=20 > WARNING: CPU: 0 PID: 39 at mm/backing-dev.c:372 bdi_unregister+0x3a/0x50() > CPU: 0 PID: 39 Comm: kworker/0:1 Not tainted 4.1.0-rc4-gelk-debug+ #1 > Workqueue: md_misc mddev_delayed_delete [md_mod] > 0000000000000009 ffff8800baf9fbf8 ffffffffa6768350 0000000000000000 > 0000000000000000 ffff8800baf9fc38 ffffffffa607eaaa ffff8800baf9fc18 > ffff8800b57cdcd0 0000000000000000 0000000000000000 00000000ffffffff > Call Trace: > [] dump_stack+0x4f/0x7b > [] warn_slowpath_common+0x8a/0xc0 > [] warn_slowpath_null+0x1a/0x20 > [] bdi_unregister+0x3a/0x50 > [] del_gendisk+0x11f/0x250 > [] md_free+0x43/0x60 [md_mod] > [] kobject_release+0x7a/0x1c0 > [] kobject_put+0x35/0x70 > [] mddev_delayed_delete+0x34/0x40 [md_mod] > [] process_one_work+0x1f1/0x820 > [] ? process_one_work+0x160/0x820 > [] ? worker_thread+0xfb/0x4b0 > [] worker_thread+0x6b/0x4b0 > [] ? process_one_work+0x820/0x820 > [] ? process_one_work+0x820/0x820 > [] kthread+0x11f/0x140 > [] ? kthread_create_on_node+0x250/0x250 > [] ret_from_fork+0x42/0x70 > [] ? kthread_create_on_node+0x250/0x250 > ---[ end trace 424fb17cf914b7dc ]--- >=20 >=20 > 370 void bdi_unregister(struct backing_dev_info *bdi) > 371 { > 372 if (WARN_ON_ONCE(!bdi->dev)) > 373 return; > 374=20 https://lkml.org/lkml/2015/5/19/42 NeilBrown --Sig_/ooi1A9e8mGtScLcBPAllhYH Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIVAwUBVV5AkDnsnt1WYoG5AQJRJg//RJp64p7eZjbaRUAE8CyyIBAPH35fhc7j RJqRoqIKAYnFgEtmhkc4towRUmITwJtuTk0SBNxbPWk7fhISCQp6uLMx1ylkX+xH 6yvN1yzBytV3sqwYVsupt9Fwvc1sz8dYzWmlJ0kKlpGi6uUBA/FB9KU9x52HrYDO J1+O9mvXoTX+UXioHMkPiHcfRc+/zJiAZRPtlaw+OCJfBYx9Y6mTlESfPSbUE2xZ gDXyLeZcpTdq/YF9/LLH/Rvw2vxLPJ+lN3XfFJaWMg6l12pf832K7b3eaujyM3ag ig+veCq5FqQwzsUJMEivNyH1oF9E3Yr+o744clnAYckAb2QaKOwhulp69e0ilKKv u6yF/tt5HH1YxyDvhDoXreLywwLh7cjVukrLrOkiQAxbtwHJt/Qt4QxMlW1Ia1eG 02WvTMd0AWcfke9E4f2y9WD5Q5daJZ93qi8NTAN4v/0QYZ6YcLU4GZkWZiFbrYHc d91pTiCOeu3YVlB5Zy53H7cpGG3OuBxsmUXmQyFWPFKmiosQ2+2hDKAcl0q9fU76 1SRV+q1weD0tVGbe/WVKisRK6Y2Pv8SNYqVWQ9wprXMTJpRmLuL7z7NBOMChYIXE yQZ+mgUV3xxVXBub/JXl/sZmUrlF+UUK48SyatBOuuV+j14NMekL27V9Y5iH3ZN8 7bmhisZgmg8= =Qy81 -----END PGP SIGNATURE----- --Sig_/ooi1A9e8mGtScLcBPAllhYH--